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  • AERODYNAMICS  (7,979)
  • Climate
  • 2020-2023  (7)
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  • 1
    Electronic Resource
    Electronic Resource
    Mediterranean climate and geriatrics (1987)
    Springer
    Cellular and molecular life sciences 43 (1987), S. 57-63 
    Details
    ISSN: 1420-9071
    Keywords: Climate ; health ; human bioclimatology ; meteoropathology ; geriatrics ; Mediterranean area
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01940354
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  • 2
    Electronic Resource
    Electronic Resource
    The 15N/14N ratios of plants in South Africa and Namibia: relationship to climate and coastal/saline environments (1987)
    Springer
    Oecologia 74 (1987), S. 236-246 
    Details
    ISSN: 1432-1939
    Keywords: Plants ; 15N/14N ratios ; Climate ; Coastal ; Saline
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Data are presented for the 15N/14N ratios of 140 indigenous terrestrial plants from a wide variety of natural habitats in South Africa and Namibia. Over much of the area, from high-rainfall mountains to arid deserts, the δ 15N values of plants lie typically in the range -1 to +6‰; with no evident differences between C3 plants and C4 grasses. There is a slight correlation between δ 15N and aridity, but this is less marked than the correlation between the δ 15N values of animal bones and aridity. At coastal or saline sites, however, the mean δ 15N values for plants are higher than those at nearby inland or non-saline sites-e.g.: arid Namib coast (10‰ higher than inland Namib); wet Natal beach (5‰ higher than inland Natal); saline soils 500 km from coast (4‰ higher than non-saline soils). High values were also found at one site where there were no marked coastal or saline influences. These environmental effects on the isotopic composition of plants will extend upwards to the animals and humans they support. They therefore have important consequences for the use of nitrogen isotope data in the study of the dietary habits and trophic structures of modern and prehistoric communities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00379365
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  • 3
    Electronic Resource
    Electronic Resource
    Effects of clonal variation of the host plant, interspecific competition, and climate on the population size of a folivorous thrips (1987)
    Springer
    Oecologia 74 (1987), S. 298-303 
    Details
    ISSN: 1432-1939
    Keywords: Climate ; Clonal variation ; Community structure ; Herbivory ; Interspecific competition ; Plant-insect interactions ; Thrips
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The effects of clonal variation, interspecific competition, and climate upon the population size of Apterothrips secticornis was assessed by a series of observations and experimental manipulations. Three clones of the host plant, Erigeron glaucus, consistently supported different numbers of thrips during monthly censuses. When rosettes of the three clones were transplanted to a common garden, relative numbers of thrips on the clones remained the same as those observed where the clones grew in situ. The presence or absence of other hervivores had no effect on thrips numbers in the common garden. Plume moth caterpillars and thrips were observed to co-occur less often than expected in the field but this was caused by differences in habitat selection by these two species rather than being the result of interspecific competition. Populations of thrips were affected by climate, but analyses suggest that the host clone was a more important factor.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00379373
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  • 4
    Electronic Resource
    Electronic Resource
    Macroclimate, microclimate and dune formation along the West European coast (1991)
    Springer
    Landscape ecology 6 (1991), S. 15-27 
    Details
    ISSN: 1572-9761
    Keywords: Climate ; microclimate ; energy balance ; dunes ; dune formation ; wind ; temperature ; precipitation ; evaporation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Extremely important to the climate in any region are the radiation balance and the exchange processes of heat, water vapour and momentum. Most climatological parameters (e.g. temperature, humidity, wind speed, cloudiness and precipitation) are the direct or indirect result of the radiation balance and these exchange processes. The weather of the West European coast from Tarifa (Spain) to Skagen (Denmark) is especially suitable for the formation of dunes. Often a wind is blowing, varying widely in force and direction. The conditions are optimal for the formation of high and wide dune complexes, given a large supply of sand by the sea. The annual precipitation surplus is considerable for most of this coast. This favours the establishment of vegetation, and thereby it enhances dune formation. The short distance to the land-sea border causes strong gradients in several climatological parameters. These gradients lead to mesoscale effects, such as land-sea breezes and coastal fronts. The varying vegetation cover and the presence of slopes in all directions induce a strongly varying microclimate. However, this microclimate is not unique to the coastal dunes. Unique is the interaction with the wide range of ambient weather, which is inherent to the coast. It is not possible to be conclusive about the effects of climatic change on coastal dunes because climate models are not yet able to predict the changes adequately and because these models supply information on the expected mean climate, but not on the actual weather.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00157741
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  • 5
    Electronic Resource
    Electronic Resource
    Impact of coupled perturbations of atmospheric trace gases on Earth's climate and ozone (1982)
    Springer
    Pure and applied geophysics 120 (1982), S. 626-641 
    Details
    ISSN: 1420-9136
    Keywords: Climate ; Ozone ; Photochemical model
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract We have studied the effects on the ozone concentration and surface temperature, of perturbations in the atmospheric content of nitrous oxide, methane, carbon dioxide and chlorofluorocarbons (CFC). The sensitivity study has been carried out with a radiative-convective-photochemical model. The doubling of carbon dioxide concentration has the effect of warming the troposphere and cooling the stratosphere. As a result of this cooling, the change of ozone columnar density produced by 10 ppb of chlorine amount to 9.3% as compared to −10.9% obtained without temperature feedback. Perturbation in nitrous oxide correspond to an increase in NO x of the stratosphere with consequent ozone reduction while doubling the methane concentration correspond to a slight increase in columnar density. The effect of the increased methane concentration in the stratosphere contributes to reduce the effect of CFC due to the enhanced formation of HCl. The perturbation of these two minor constituents appreciably increase the greenhouse effect to 2.30 from 1.67°, obtained when carbon dioxide alone is considered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00876648
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  • 6
    Electronic Resource
    Electronic Resource
    Significance evaluation of factors controlling river water composition (1993)
    Springer
    Environmental geology 22 (1993), S. 178-185 
    Details
    ISSN: 1432-0495
    Keywords: River water chemistry ; Petrography ; Geomorphology ; Climate ; Pollution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract In the present paper the factors controlling river water chemistry are described and their significance is evaluated, including: climate, petrography, soils/sediments, geomorphology of the catchment area, hydrography, pollution, biological activity of rivers, and rainwater composition. The results of this study indicate that the dominant factors influencing riverwater chemistry are the climate and the petrography of the catchment area. In the case of heavily polluted rivers, pollution appears to be the dominant factor. The approach followed is based on the watershed information, e.g., climatic, geomorphological, petrographical (percentage distribution of geochemical important petrographic units), soil/sediment composition, rainwater composition, as well as the hydrographic and the hydrochemical data of the rivers. In order to achieve a better understanding of the nature of the factors influencing river water composition as well as to specify them quantitatively, multivariate statistical analyses (factor and cluster analyses) were performed on the rain-corrected hydrochemical and petrographic information of the watersheds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00789329
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  • 7
    Electronic Resource
    Electronic Resource
    Age at menarche: the influence of environmental conditions (1988)
    Springer
    International journal of biometeorology 32 (1988), S. 33-35 
    Details
    ISSN: 1432-1254
    Keywords: Climate ; Age at menarche ; High school girls ; Environmental temperature
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Notes: Abstract Age at menarche was studied by the recollection method in two groups of Causasian Jewish high school girls, inhabitants of two towns in Israel, Safad and Elat. The two towns differ mainly in climatic conditions. The age at menarche was found to be significantly lower (P〈0.02) in the hot town of Elat than in the temperate town of Safad: 13.30±1.21 and 13.58±0.9 years, respectively (mean ±SD). A significant association was found between the age at menarche and the town in which the girls lived. Accordingly, in the hot town of Elat, the percentage of girls who had their first menstrual cycle by the age of 12 years and earlier, was more than double that of the girls in Safad (17.9% and 7.1%, respectively). It is concluded that the environmental temperature, with or without any possible interaction of humidity, is probably responsible for the tendency for an earlier onset of menarche in girls living in the hot town of Elat.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01623990
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  • 8
    Electronic Resource
    Electronic Resource
    Climate and natural production of rubber (Hevea brasiliensis) in Xishuangbanna, southern part of Yunnan province, China (1988)
    Springer
    International journal of biometeorology 32 (1988), S. 280-282 
    Details
    ISSN: 1432-1254
    Keywords: Climate ; Rubber ; Yield ; overwintering ; Growth
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Notes: Abstract According to the author's and his collaborators' investigations, the climate influences the growth of rubber trees (Hevea brasiliensis) in Xishuangbanna, the southern part of Yunnan Province, China, in at least four aspects: (1) The yield of latex per tapping and the final yield of dry rubber per tree per year or per unit area per year; (2) the growth rate, as expressed by increment of girth in cm; (3) the survival during the over-wintering period; (4) the initiation or suppression of certain diseases; In this paper the author would like to describe the influence of climatic elements on yield of latex and on survival during the over-wintering period. As for the other two aspects, only general comments are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01080028
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  • 9
    Electronic Resource
    Electronic Resource
    Ecological classification of the climate of the Rhine catchment (1990)
    Springer
    International journal of biometeorology 34 (1990), S. 194-203 
    Details
    ISSN: 1432-1254
    Keywords: Climate ; Classification ; Principal components analysis ; Landscape ecology ; Rhine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Notes: Abstract An ordination and classification it carried out on the climate of the Rhine catchment based on data from meteorological stations. The objective of the classification is to provide an ecological interpretation of climate data. The climate of northern France, Belgium, Luxemburg, the Netherlands, the Federal Republic of Germany and northern Switzerland is divided into five classes, of which two, the Atlantic and the subcontinental are subdivided further into subclasses. The climate classes can be interpreted ecologically and are correlated with floristic and vegetation data. The Rhine valley has a distinctive and characteristic climate. Interpolation of the classification is not carried out, because of the uneven geographical spread of the sites in the dataset.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01048720
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  • 10
    Electronic Resource
    Electronic Resource
    Quests for cures: A history of tourism for climate and health (1993)
    Springer
    International journal of biometeorology 37 (1993), S. 113-124 
    Details
    ISSN: 1432-1254
    Keywords: History ; Climate ; Health ; Tourism ; Hippocratic corpus philosophy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Notes: Abstract This paper creates a framework for the study of the history of tourism for climate and health. It traces the ways in which people have both moved away from detrimental health conditions and towards places thought to provide climatic cures. It brings to light the complex issues that have affected the course of the tourist trade. In this way it helps to explain that the modern geographical distribution of the highly fashionable resort areas of the world owe a great deal to past and present interpretations of the HippocraticCorpus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01212620
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  • 11
    Electronic Resource
    Electronic Resource
    The distribution of the most favorable temperatures for citrus flower induction in Israel (1992)
    Springer
    International journal of biometeorology 36 (1992), S. 108-112 
    Details
    ISSN: 1432-1254
    Keywords: Citrus flowers ; Induction ; Israel ; Climate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Notes: Abstract In this study the distribution of optimum temperatures for the induction of citrus blossoms in Israel has been determined. The number of flowers that form on citrus plants grown in the subtropics is known to be affected by the temperatures to which the plants are exposed. However, too few records of hourly temperatures exist in Israel to make an estimate of the occurrence and/or distribution of temperatures beneficial for citrus flower induction, although maximum and minimum temperatures are widely recorded. Thus, a model derived from the hourly records could be applied to the stations recording only maximum and minimum temperatures. The average optimum temperature was mapped for citrus flower induction throughout Israel.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01208921
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  • 12
    Electronic Resource
    Electronic Resource
    Carbon isotope discrimination by plants follows latitudinal and altitudinal trends (1991)
    Springer
    Oecologia 88 (1991), S. 30-40 
    Details
    ISSN: 1432-1939
    Keywords: Alpine ecology ; CO2 ; Climate ; δ13C ; Leaf structure ; Oxygen ; Photosynthesis ; Temperature
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary In an earlier paper we provided evidence that carbon isotope discrimination during photosynthesis of terrestrial C3 plants decreases with altitude, and it was found that this was associated with greater carboxylation efficiency at high altitudes. Changing partial pressures of CO2 and O2 and changing temperature are possible explanations, since influences of moisture and light were reduced to a minimum by selective sampling. Here we analyse plants sampled using the same criteria, but from high and low altitudes along latitudinal gradients from the equator to the polar ends of plant distribution. These data should permit separation of the pressure and temperature components (Fig. 1). Only leaves of fully sunlit, non-water-stressed, herbaceous C3 plants are compared. The survey covers pressure differences of 400 mbar (ca. 5000 m) and 78 degrees of latitude (ca 25 K of mean temperature of growth period). When habitats of similar low temperature (i.e. high altitude at low latitude and low altitude at polar latitude) are compared, discrimination increases towards the pole (with decreasing altitude and thus increasing atmospheric pressure). Latitudinally decreasing temperature at almost constant atmospheric pressure (samples from low altitude) is associated with a decrease in discrimination. So, polar low-altitude plants have δ13C values half way between humid tropical lowland and tropical alpine plants. It is unlikely that latitudinal changes of the light regime had an effect, since low and high altitude plants show contrasting latitudinal trends in δ13C although local altitudinal differences in overall light consumption were small. These results suggest that both temperature and atmospheric pressure are responsible for the altitudinal trends in 13C discrimination. Temperature effects may partly be related to increased leaf thickness (within the same leaf type) in cold environments. Theoretical considerations and laboratory experiments suggest that it is the oxygen partial pressure that is responsible for the pressure related change in discrimination. The study also provided results of practical significance for the use of carbon isotope data. Within a community of C3 plants, discrimination in species of similar life form, exposed to similar light, water and ambient CO2 conditions ranges over 4‰, with standard deviations for 10–30 species of ±0.6 to 1.2‰. This natural variation has to be taken into account by using a sufficient sample size and standardization of sampling in any attempt at ecological site characterization using carbon isotope data. Evidence of a pronounced genotypic component of this variation in 13C discrimination in wild C3 plant species is provided. Correlations with dry matter partitioning, mesophyll thickness and nitrogen content are also present.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00328400
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  • 13
    Electronic Resource
    Electronic Resource
    Variation in the diversity of ducks along a gradient of environmental variability (1993)
    Springer
    Oecologia 93 (1993), S. 242-250 
    Details
    ISSN: 1432-1939
    Keywords: Climate ; Ducks ; Diversity ; Multivariate analysis ; Prairies
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Tramer (1969) proposed that communities regulated by competition in benign, predictable environments were characterized by (i) damped variation in evenness relative to variation in richness over time, and (ii) high evenness relative to communities regulated by variation in the abundance and diversity of resources in rigorous, unpredictable environments. To test whether patterns of variation in diversity could reflect the mechanisms proposed to regulate community structure, temporal and spatial changes in the diversity, richness and evenness of breeding duck communities were examined along a gradient of variability in wetland conditions using thirty-three years of duck census and climate data from the Canadian prairie and boreal forest regions. Temporal variation in evenness was independent of wetland habitat variability. Changes in richness were more parsimoniously explained by the appearance of ducks displaced (by drought) from rigorous, variable, wetland habitats into relatively benign ones, than by competition in benign areas. Evenness was not significantly higher for duck guilds in more constant wetland habitats, as predicted. Variation in richness, evenness and diversity, predicted by Tramer, do not provide a basis for distinguishing the factors that regulate duck community structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00317677
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  • 14
    Electronic Resource
    Electronic Resource
    Proximate factors influencing egg cannibalism in the land snail Arianta arbustorum (Pulmonata, Helicidae) (1986)
    Springer
    Oecologia 70 (1986), S. 283-287 
    Details
    ISSN: 1432-1939
    Keywords: Arianta ; Pulmonata ; Egg cannibalism ; Oophagy ; Climate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Factors affecting oophagy among siblings in the land snail Arianta arbustorum were studied in 3 populations from different altitudes in Switzerland. The degree of egg cannibalism in A. arbustorum is a function of hatching asynchrony since the earliest hatched snails will devour the unhatched eggs in the same clutch. Clutch size, egg density and amount of vegetable food available to newly hatched snails did not affect the degree of cannibalism. Snails from 3 populations were similar in terms of incubation time and intrinsic hatching asynchrony of the clutches. However, they differed in degree of cannibalism when the hatching asynchrony had been experimentally increased. Snails from a lowland forest showed a higher degree of cannibalism than did those from an alpine mountain slope. The parent snails differed in terms of incubation time and hatching synchrony in their clutches. Under natural conditions, the length of the hatching spread and, as a result, the degree of cannibalism will depend additionally on the mode of oviposition (batches or single; clumped or dispersed), on the spatial heterogeneity of egg-laying places and on climatic conditions (e.g. drought).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00379252
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  • 15
    Electronic Resource
    Electronic Resource
    Distribution of C3 and C4 grasses at different altitudes in a temperate arid region of Argentina (1988)
    Springer
    Oecologia 76 (1988), S. 273-277 
    Details
    ISSN: 1432-1939
    Keywords: Grasses ; Photosynthetic type ; Distribution ; Climate ; Altitude ; Argentina
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The distribution of native C3 and C4 grasses in a temperate arid region of Mendoza, Argentina, was studied in six areas at different altitudes. C4 species predominate at low elevations in both relative species abundance and plant cover. At high elevations C3 species are dominant in cover and composition. At medium altitudes (1100–1600 m) grass species composition is balanced but plant cover of C3 species is greater. Of 31 genera in the whole area, 19 were C4. Only the genera Stipa (C3) and Aristida (C4) were present in all the six areas surveyed. The pattern of grass distribution shows high correlation with evapotranspiration and temperature parameters, but low correlation with rainfall. The relation between grass distribution and different climatic parameters is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00379962
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  • 16
    Electronic Resource
    Electronic Resource
    Differences among model simulations of climate change on the scale of resource regions (1989)
    Springer
    Environmental management 13 (1989), S. 789-795 
    Details
    ISSN: 1432-1009
    Keywords: Climate ; General circulation models ; Regional analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The climate simulations from atmospheric general circulation models (GCMs) are often used to analyze the potential effects of climate change on environmental resources. It has been demonstrated that there are differences among the simulations from various GCMs, on spatial scales ranging from global to regional. This paper quantifies the differences in temperature and precipitation simulated by three major GCMs for four specific regions: an agricultural region (the North American winter wheat belt), a hydrologic region (the Great Basin), a demographic region (the high-density population corridor of the northeast United States), and a political region (the state of Texas). Both the current (control) climate and the climatic response to a doubling of atmospheric carbon dioxide (CO2) are considered In each region, even when the data are averaged on a seasonal basis, marked differences occurred in the areal average climate simulated by the different GCMs for both the control climate and the doubled-CO2 climate. Thus, climate impact studies based on the simulations of more than one GCM could easily yield a range of possible results
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01868318
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  • 17
    Electronic Resource
    Electronic Resource
    Prehistoric land use as recorded in a lake-shore core at Lake Constance (1993)
    Springer
    Vegetation history and archaeobotany 2 (1993), S. 213-232 
    Details
    ISSN: 1617-6278
    Keywords: Human impact ; Lake Constance ; Neolithic ; Bronze Age ; Climate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Archaeology , Biology
    Notes: Abstract The second part of a pollen profile from Hornstaad/Lake Constance (Germany), containing the Atlantic and Subboreal (6400 cal B.C. to 700 cal B.C.) is presented. The diagram has a sampling interval of 1 cm and an average time resolution of 10 years. The cereal curve provided the basis for cereal zones, which are used to classify the human impact. Twenty-six cereal zones can be distinguished, most of them divided into subzones, from 5500 cal B.C. to 700 cal B.C. They correspond to both known and, mostly, unknown settlements in the surrounding landscape from the Early Neolithic to the Late Bronze Age. Charcoal and chemical analyses as well as sediment accumulation, confirmed by accelerator dates, provide evidence for human impact on the environment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00198163
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  • 18
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    Electronic Resource
    Factors affecting the diversity of flora and vegetation in central European settlements (1993)
    Springer
    Plant ecology 106 (1993), S. 89-100 
    Details
    ISSN: 1573-5052
    Keywords: Climate ; Landscape islands ; Number of communities ; Number of species ; Settlement size ; Species-area relationships
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Published data on the number of plant species and/or communities were gathered for 77 European cities and 85 villages. The relationships between the floristic and vegetation diversity and some environmental variables were analysed. Species number in cities showed log linear increase with city size (expressed as the population size or city area). A linear increase in the species number with size was found in the village flora. The richness of both city and village flora was not significantly related to any climatic variable. On the contrary, the number of communities in both villages and cities was correlated not only with settlement size but also with altitude and mean annual temperature. The diversity of village vegetation was closely related to the climax type of the respective region. The features of human settlements that make it possible to consider them as landscape islands are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00044860
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  • 19
    Electronic Resource
    Electronic Resource
    Distribution of plant species and vegetation types in relation to climate (1983)
    Springer
    Plant ecology 54 (1983), S. 17-25 
    Details
    ISSN: 1573-5052
    Keywords: Climate ; Distribution ; Precipitation ; Temperature
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The distribution of plant species and vegetation types in the Prairie provinces of Canada can be related to climatic phenomena. The ratio of summer/spring precipitation appears to be especially important, with temperatures of less importance. Climatic areas can be outlined; within these areas differences in soils are important.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00036076
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  • 20
    Electronic Resource
    Electronic Resource
    A predictive model relating North American plant formations and climate (1985)
    Springer
    Plant ecology 60 (1985), S. 103-111 
    Details
    ISSN: 1573-5052
    Keywords: Climate ; Discriminant analysis ; Distribution ; Formation ; Model ; North America ; Prediction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A discriminant model was produced that predicts North American plant formations with basic climatic variables (monthly mean temperatures, monthly precipitation, and latitude). The model is based on data from 176 weather stations. Climatic variables from 30 additional randomly-selected weather stations were used to test the model. The predicted formation and actual formation at each site were compared; four sites were classified into the wrong formations (87% accuracy). This predictive model indicates a strong correlation between climate and formations in North America. Vegetation-climate models produced by canonical discriminant analysis may be useful in detecting geographical localities where non-climatic factors are particularly influential.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00040353
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  • 21
    Electronic Resource
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    Plant communities along the Medina-Badr road across the Hejaz mountains, Saudi Arabia (1983)
    Springer
    Plant ecology 53 (1983), S. 33-43 
    Details
    ISSN: 1573-5052
    Keywords: Climate ; Habitat feature ; Hejaz mountains ; Plant community ; Saudi Arabia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The present study gives an assessment of the environmental factors and their effect on the pattern and distribution of the plant communities in the area along the road from Medina to Badr, Saudi Arabia. The road crosses the Hejaz mountains and the study area presents three main ecogeomorphological systems which are differentiated into various habitats. Rainfall and plant cover show wide variation, both in quantity and distribution in the different sectors of the study area. Also, the wide variations in topography, rock types and soil characteristics, have a marked influence on the water resources and consequently on the vegetation. Twenty-three communities, recognized by species dominance and habitat features, have been distinguished. These include ten communities dominated by trees and shrubs; five of them are dominated by one of the Acacia spp. growing in the area. Seven communities are dominated by suffrutescent species and six are dominated by ephemeral species. The latter communities appear only during the wet season and disappear at the beginning of summer. The floristic conoposition and the habitat features are described and the ecological relationships between the communities are briefly discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00039769
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  • 22
    Electronic Resource
    Electronic Resource
    Climate and plant distribution at global and local scales (1987)
    Springer
    Plant ecology 69 (1987), S. 189-197 
    Details
    ISSN: 1573-5052
    Keywords: Climate ; Drought ; Frost resistance ; Gap ; Life-cycle ; Plant distribution ; Population dynamics ; Temperature
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract This paper investigates, with predictive models, the utility of ecophysiological responses to climate as predictors of plant distribution. At the global scale responses to extreme minimum temperatures and to the hydrological budget effectively predict the distribution limits of the major vegetation types of the World. A minimum temperature of -15°C, for example, appears critical in controlling the poleward spread of vegetation that is dominated by evergreen broadleaved species; however, the presence or absence of more frost resistant species, such as those that are deciduous broadleaved, is not obviously explained in terms of extremes of climate. In such cases, predicting the competitive relationships between species is necessary and dependent on the climatic sensitivity of population dynamics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00038700
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    Electronic Resource
    A 7000-year pollen record from the Amazon lowlands, Ecuador (1988)
    Springer
    Plant ecology 76 (1988), S. 141-154 
    Details
    ISSN: 1573-5052
    Keywords: Cereal ; Climate ; Fossil pollen ; Holocene ; Palynology ; Vegetational history
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The longest continuous Amazonian palynological record (ca 7010 yrs B.P. to present) from Lake Ayauchi, Ecuador, reveals species-by-species abundance changes during a period of climatic change. Pollen influx from a wet tropical rain forest was found to be high, 1×104−105 grains cm-2 yr-1, although mature forest taxa were poorly represented. Horizons of laminated sediments and weathered gyttja, dated to ca 4200–3150 B.P., evidence a period of reduced net water availability. During this period Ficus, Alchornea and Palmae pollen representation appears to decline, although there is no evidence of a major forest compositional change. The lake was reduced to a shallow, possibly seasonal, pool. Zea cultivation was recorded between ca 2850 B.P., (the earliest paleoecological record to date in the Amazon basin) and ca 800 B.P. It is suggested that Zea was cultivated on exposed lake sediment within the crater at times of low water levels. The abandonment of Zea cultivation may have been due to rising water levels or social unrest.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00045475
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    Electronic Resource
    Vegetation structure and microclimate of three Dutch Calthion palustris communities under different climatic conditions (1985)
    Springer
    Plant ecology 59 (1985), S. 159-169 
    Details
    ISSN: 1573-5052
    Keywords: Biomass ; Calthion palustris ; Climate ; LAI ; Microclimate ; Vegetation structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Three Dutch Calthion palustris communities, situated in different phytogeographic districts which vary in elimatic conditions, are compared with respect to vegetation structure and microclimate. The three Calthion stands which are similar in soil, management and hydrology, differ slightly in total aboveground biomass in the period just before cutting, but there is a larger difference in the biomass contributed by phanerogams, bryophytes and litter. The structure of the Calthion communities varies in vertical distribution of biomass and leaf area (LAI), and growth form and leaf size composition. These differences are interpreted in terms of elimatic differences such as length of growing season, temperature and wind. Profiles of decreasing light intensity within the vegetation canopy are related to the vertical distribution of biomass, LAI and leaf inclination of the various Calthion communities. Temperature and saturation deficit of the air on the different sites show profiles of a similar shape which suggests that in such ecologically comparable plant communities, vegetation structure differs under influence of the macroclimate in such a way that the resulting vegetation canopies modify the microclimate within the vegetation to become homologous.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00055686
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    Electronic Resource
    Electronic Resource
    Multivariate analysis of climatic patterns of the Meditrranean basin (1992)
    Springer
    Plant ecology 98 (1992), S. 1-12 
    Details
    ISSN: 1573-5052
    Keywords: Climate ; Mediterranean ; Cluster analysis ; Principal Component Analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Climatic data from 444 weather-recording stations in the Mediterranean basin are examined by cluster analysis and principal component analysis. The application of numerical clustering distinguished several groups of climatic stations clearly interpretable in geographic and climatic terms. The hierarchical structure of the dendrograms could be used to identify at different scales uniform climatic regions. The complementary application of principal component analysis produced an ordination of climatic types, which clearly showed the main trends of variation in the precipitation and temperature patterns.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00031632
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    Electronic Resource
    Electronic Resource
    Body size variation in baboons: A reconsideration of ecological determinism (1988)
    Springer
    Primates 29 (1988), S. 135-137 
    Details
    ISSN: 0032-8332
    Keywords: Papio ; Body size ; Ecology ; Climate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Popp (1983) presented an intriguing argument regarding the covariation of body size in baboons and rainfall. However, a reanalysis of the data indicates that “Principle 2” of the model is not supported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02380856
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    Electronic Resource
    Crop production and management under saline conditions (1985)
    Springer
    Plant and soil 89 (1985), S. 253-271 
    Details
    ISSN: 1573-5036
    Keywords: Climate ; Co2 concentration ; Drip ; Fertilization ; Irrigation interval ; Leaching ; Salt tolerance ; Salinity ; Sprinkler ; Stand
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary This review evaluates management practices that may minimize yield reduction under saline conditions according to three strategies: (I) control of root-zone salinity; (II) reduced damage to the crop; (III) reduced damage to individual plants. Plant response to salinity is described by an unchanged yield up to a threshold soil salinity (a), then a linear reduction in relative yield (b), to a maximum soil salinity that corresponds to zero yield (Yo). Strategies I and II do not take into consideration any change in the parameters of the response curve, while strategy III is aimed at modifying them. Control of root zone salinity is obtained by irrigation and leaching. From the review of existing data it is concluded that the effective soil salinity parameter should be taken as the mean electrical conductivity of the saturated paste extract or of the soil solution over time and space. Several irrigation and leaching practices are discussed. It is shown that intermittent leaching is more advantageous than leaching at each irrigation. Specific cultivation and irrigation practices that result in soil salinity reduction adjacent to young seedlings and the use of water of low salinity at specifically sensitive growth stages may be highly beneficial. Recent data do not show that reduced irrigation intervals improve crop response more under saline than under nonsaline irrigation. Alternate use of water of different salt concentrations results in mixing in the soil and the crop responds to the mean water salinity. Reduced damage at the fiel level when soil or irrigation water salinity is too high to maintain full yield of single plants requires a larger crop stand. For row crops reduced inter-row spacing is more effective than reduced intra-row spacing. Reduced damage at the plant level while the salinity tolerance of the plants remains constant shows up in the response curve parameters as larger threshold and slope and constant salinity at zero yield. This is the effect of a reduced atmospheric water demand that results in reduced stress in the plant under given salinity. Management can also change the salt tolerance of the crop. This will show up as higher salinity at zero yield, as well as changes in threshold and slope. Such changes in the response curve were found at different growth stages, under different atmospheric CO2, under different fertilization, and when sprinkler irrigation was compared with drip irrigation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02182246
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    Electronic Resource
    Electronic Resource
    Distribution of spring barley roots in Danish soils, of different texture and under different climatic conditions (1985)
    Springer
    Plant and soil 88 (1985), S. 31-43 
    Details
    ISSN: 1573-5036
    Keywords: Barley ; Climate ; Roots ; Texture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Spring barley root profiles have been investigated in three years with different climatological conditions during the growing season. In total, 50 root profiles were determined by measuring cm root/ml soil in different 10 cm sections of the profile. The investigations, show that the root density was nearly identical for all soil types within the upper part of the plough layer. The decrease in root density with depth is most pronounced for the sandy soils and less for the loamy soils. The mean max. root depth in the sandy soils was roughly 70 cm, while it was roughly 140 cm for the loamy soils. A comparison between the clay and silt content in the subsoil and the thickness of soil layers with more than given root densities shows that there is no correlation between texture and thickness of soil layers with more than 1.0 cm root/ml soil, while there was a clear, positive correlation between thickness of soil layers with lower root densities and the clay and silt content in the subsoil. The different climatological conditions during the growing season give rise to differences in the root development. Very wet springs seem to impede root development in loamy soils with slowly permeable subsoils, while this is not the case in the sandy soils.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02140664
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    SINTA - SImulations of climate chaNge in the mediTerranean Area - Final scientific report (2008)
    Details
    Publication Date: 2020-12-21
    Description: This SINTA Project establish a scientific cooperation between the Italian Scientific Institution INGV (National Institute of Geophysics and Volcanology) and the Serbian Scientific Institutions such as the Republic HydroMeteorological Service (RHMSS) and the University of Belgrade (UB). INGV contributes the global models, University of Belgrade and RHMSS contribute their expertise on regional models, parameterization ofphysical processes and numerical schemes. In particular, the main objectives of this Project are: 1) Perform a set of global simulations with a Global Climate Model (GCM) available at INGV; 2) Perform a set of regional simulations with the UB Regional Climate Model (RCM) forced by boundary conditions from the GCM simulations; 3) Test the convection parameterization developed at UB in the INGV global model; 4) Training and visit exchanges of Serbian scientists in Italy.
    Description: INGV
    Description: Unpublished
    Description: 3.7. Dinamica del clima e dell'oceano
    Description: open
    Keywords: Climate ; Mediterranean Area ; 01. Atmosphere::01.01. Atmosphere::01.01.02. Climate
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: report
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    Changes in Tropical Cyclone Activity due to Global Warming: Results from a High-Resolution Coupled General Circulation Model. (2008)
    Details
    Publication Date: 2017-04-04
    Description: This study investigates the possible changes that greenhouse global warming might generate in the characteristics of tropical cyclones (TCs). The analysis has been performed using scenario climate simulations carried out with a fully coupled high-resolution global general circulation model. The capability of the model to reproduce a reasonably realistic TC climatology has been assessed by comparing the model results from a simulation of the twentieth century with observations. The model appears to be able to simulate tropical cyclone–like vortices with many features similar to the observed TCs. The simulated TC activity exhibits realistic geographical distribution, seasonal modulation, and interannual variability, suggesting that the model is able to reproduce the major basic mechanisms that link TC occurrence with large-scale circulation. The results from the climate scenarios reveal a substantial general reduction of TC frequency when the atmospheric CO2 concentration is doubled and quadrupled. The reduction appears particularly evident for the tropical western North Pacific (WNP) and North Atlantic (ATL). In the NWP the weaker TC activity seems to be associated with reduced convective instabilities. In the ATL region the weaker TC activity seems to be due to both the increased stability of the atmosphere and a stronger vertical wind shear. Despite the generally reduced TC activity, there is evidence of increased rainfall associated with the simulated cyclones. Finally, the action of the TCs remains well confined to the tropical region and the peak of TC number remains equatorward of 20° latitude in both hemispheres, notwithstanding the overall warming of the tropical upper ocean and the expansion poleward of warm SSTs.
    Description: Euro-Mediterranean Centre for Climate Change. European Community project ENSEMBLES, Contract GOCE-CT-2003-505539.
    Description: Published
    Description: 5204-5228
    Description: 3.7. Dinamica del clima e dell'oceano
    Description: JCR Journal
    Description: reserved
    Keywords: Tropical Cyclone ; Climate ; 01. Atmosphere::01.01. Atmosphere::01.01.02. Climate
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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    Il programma di monitoraggio C6: Climatic Changes and Carbon Cycle in Canyons and Caves (2008)
    Details
    Publication Date: 2017-04-04
    Description: L'acronimo C6 sta per "Climatic Changes and Carbon Cycle in Canyons and Caves". E' un progetto di monitoraggio dei parametri climatici e dell'anidride carbonica, nato come tale nel 2005, ma che ha raggruppato al proprio interno attività di monitoraggio ambientale promosse da gestori di aree protette ed associazioni sportivo-ambientali sin dal 1999. Allo stato attuale sono attivi 6 siti di misura, disposti lungo un transetto Sud-Nord nell'areale mediterraneo, dalla Giordania sino all’Appennino Settentrionale. Un settimo sito sarà attivato entro l'estate 2006 in una cavità carsica in prossimità di Sarajevo (Bosnia Herzegovina). Il progetto si propone di monitorare parametri climatici ed ambientali all'interno di gole e grotte, con particolare riferimento alle concentrazioni di anidride carbonica in atmosfera, a temperatura ed umidità atmosferiche ed alle intensità di pioggia e stillicidio.Il progetto C6 assume rilevanza ai fini della conservazione della biodiversità in quanto le gole, specialmente in ambienti aridi e semi-aridi, rappresentano spesso l'unico luogo della superficie dove è presente acqua, costituendo quindi un rifugio preferenziale per tutte quelle specie viventi per le quali la disponibilità costante di acqua è fondamentale per il proprio ciclo vitale. Attraverso la rete C6 ci si propone di valutare la criticità dei parametri monitorati ai fini della conservazione degli ecosistemi presenti ed i possibili effetti derivanti da processi di cambiamento climatico
    Description: Published
    Description: Viterbo/Civitavecchia (Italia)
    Description: 3.7. Dinamica del clima e dell'oceano
    Description: open
    Keywords: Climate ; Canyon ; Cave ; Infiltration ; Air temperature ; 01. Atmosphere::01.01. Atmosphere::01.01.02. Climate
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Oral presentation
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    Monitoring climatic changes and carbon cycle in canyons and caves: the C6 project. (2008)
    Details
    Publication Date: 2017-04-04
    Description: The acronym C6 means "Climatic Changes and Carbon Cycle in Canyons and Caves". It is a monitoring project, for the evaluation of climate change signals, based on measuring sites located inside canyons and caves; it merged in the year 2005, under the scientific supervision of the Palermo Branch of the Italian National Institute for Geophysics and Volcanology (I.N.G.V.), two different monitoring programs active since 1999. The choice of these environments is based on their morphological structure: being them more or less segregated respect the outer atmosphere, they act as low-pass filters respect the variations of the monitored parameters, which are rainfall and dropping water amounts and rates, air temperatures and relative humidity and carbon dioxide concentrations in the atmosphere. On the basis of the preliminary data, reported and discussed in the paper, the C6 network seems to be capable to give useful information on the local effects of global changes, even if at the moment the monitored parameters concern only the abiotic components of the studied ecosystems.
    Description: Published
    Description: Malta
    Description: 3.7. Dinamica del clima e dell'oceano
    Description: open
    Keywords: Climate ; Carbon Dioxide ; Cave ; Canyon ; 01. Atmosphere::01.01. Atmosphere::01.01.02. Climate
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Conference paper
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    Filling the North European Early/Middle Eocene (Ypresian/Lutetian) boundary gap: Insights from the Pyrenean continental to deep-marine record (2009)
    Elsevier
    Details
    Publication Date: 2017-04-04
    Description: The Early/Middle Eocene (Ypresian/Lutetian) transition is represented by a hiatus in many North European sections, including those in which the classic stratotypes were originally defined. However, the Global Stratotype Section and Point of the Lutetian Stage, which is still pending definition, should be placed at a globally correlatable event included within that unrepresented interval. The Pyrenean Eocene outcrops display sedimentary successions that offer the rare opportunity to analyse the Ypresian/Lutetian boundary interval in almost continuous sections and in very different settings. Seven reference stratigraphic sections were selected on the basis of their quality and correlated by means of biomagnetostratigraphic data. This correlation framework casts light on the sequence of chronostratigraphic events that characterize the Ypresian/Lutetian boundary interval, which may prove useful in defining the main correlation criterion of the base of the Lutetian. All of the Pyrenean sections show a similar sedimentary evolution, despite being up to 350 km apart from each other, containing deposits of different origins (intrabasinal carbonate sediments, siliciclastic sediments sourced from the Iberian plate, and terrigenous sediments sourced from the uplifting Pyrenees) and despite having been accumulated in different sedimentary environments (from continental to deep marine) and in different geodynamic settings (piggy-back basin, foreland basin and cratonic margin). This common evolution can be readily interpreted in terms of a sea-level driven depositional sequence whose lowstand and transgressive systems tracts are included within the Ypresian/Lutetian boundary interval. The Pyrenean Ypresian/Lutetian depositional sequence can reasonably be correlated with depositional sequences from classic North European areas, shedding light on the palaeoenvironmental history which in those areas has not been recorded. Furthermore, these depositional sequences may possibly correlate with others from the Antarctic Ocean and from New Jersey, as well as with oceanic temperature variations, suggesting that they might be the result of climatically-driven glacioeustatic sea-level changes. Should this hypothesis prove correct, it would confirm previous suggestions that the onset of Antarctic glaciations needs to be backshifted to the late Ypresian at least.
    Description: Published
    Description: 313-332
    Description: 2.2. Laboratorio di paleomagnetismo
    Description: JCR Journal
    Description: reserved
    Keywords: Eocene ; Lutetian ; Chronostratigraphy ; Sequence stratigraphy ; Climate ; Pyrenees ; 03. Hydrosphere::03.01. General::03.01.06. Paleoceanography and paleoclimatology ; 04. Solid Earth::04.04. Geology::04.04.10. Stratigraphy ; 04. Solid Earth::04.05. Geomagnetism::04.05.02. Geomagnetic field variations and reversals ; 04. Solid Earth::04.05. Geomagnetism::04.05.06. Paleomagnetism
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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    West African Monsoon And Satellite Observations Of Water Vapor. (2005)
    Details
    Publication Date: 2021-05-19
    Description: The atmospheric water vapor, a main climatic parameter, remains also one of the less well known in the inter tropical area. Different space programs have been carried out to improve its measure: the data provided by these experimental or operational programs, give an alternate and complementary information the model’s analysis. Moreover, the time series available today, are long enough to allow studies of variability of different climatic parameters. The following contribution, dedicated to the climate of the Western Africa, analyses the atmospheric humidity as retrieved by NOAA8/TOVS12 dated over the last 20 years. The climatology of the upper tropospheric humidity (UTH13), retrieved from HIRS-121, evidences the importance of the position and the "strength" of dynamic component such as convergence zone, subtropical high: the relative position and the intensity of the subsidence linked to the St-Helena anticyclone appear as a key parameters for the quality of the sahelian rainfall season. Moreover, the integrated water vapor content over the Gulf of Guinea, as extracted from the NVAP9 data base (blended satellite and radiosondes observations) indicates that water vapor changes slowly; its inertia may be used for trend analysis : excess or deficit of water vapor coincides with wet or dry rainy season over the Sahel. Computations of water vapor fluxes for the lower levels (coupling the TOVS humidity to NCEP7 winds), precise the localization of the monsoon fluxes entry over the western Africa .
    Description: Published
    Keywords: Climate ; Noaa/Tovs ; Intertropical convergence zone ; Subsidence ; Satellites ; SSM/I ; Evaporation ; Monsoons
    Repository Name: AquaDocs
    Type: Report , Non-Refereed
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    Global climate patterns explain range-wide synchronicity in survival of a migratory seabird (2009)
    Details
    Publication Date: 2022-05-25
    Description: Author Posting. © The Authors, 2008. This is the author's version of the work. It is posted here by permission of John Wiley & Sons, for personal use, not for redistribution. The definitive version was published in Global Change Biology 15 (2009): 268-279, doi:10.1111/j.1365-2486.2008.01715.x.
    Description: To predict the impact of climate change over the whole species distribution range, comparison of adult survival variations over large spatial scale is of primary concern for long-lived species populations that are particularly susceptible to decline if adult survival is reduced. In this study, we estimated and compared adult survival rates between 1989 and 1997 of six populations of Cory’s shearwater (Calonectris diomedea) spread across 4600 km using capture-recapture models. We showed that mean annual adult survival rates are different among populations along a longitudinal gradient and between sexes. Variation in adult survival is synchronized among populations, with three distinct groups: (1) both females and males of Corsica, Tremiti and Selvagem (annual survival range 0.88-0.96); (2) both females and males of Frioul and females from Crete (0.82-0.92); and (3) both females and males of Malta and males from Crete (0.74-0.88). The total variation accounted for by the common pattern of variation is on average 71%, suggesting strong environmental forcing. At least 61% of the variation in survival is explained by the Southern Oscillation Index fluctuations. We suggested that Atlantic hurricanes and storms during La Niña years may increase adult mortality for Cory’s shearwater during winter months. For long-lived seabird species, variation in adult survival is buffered against environmental variability, although extreme climate conditions such as storms significantly affect adult survival. The effect of climate at large spatial scales on adult survival during the non-breeding period may lead to synchronization of variation in adult survival over the species’ range and have large effects on the meta-population trends. One can thus worry about the future of such long-lived seabirds species under the predictions of higher frequency of extreme large scale climatic events.
    Keywords: Adult survival ; Capture-recapture models ; Synchrony ; Climate ; Southern Oscillation ; Cory’s shearwater ; Calonectris diomedea
    Repository Name: Woods Hole Open Access Server
    Type: Preprint
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    Role of carbon cycle observations and knowledge in carbon management (2005)
    Annual Reviews
    Details
    Publication Date: 2022-05-25
    Description: Author Posting. © Annual Reviews, 2003. This article is posted here by permission of Annual Reviews for personal use, not for redistribution. The definitive version was published in Annual Review of Environment and Resources 28 (2003): 521-558, doi:10.1146/annurev.energy.28.011503.163443.
    Description: Agriculture and industrial development have led to inadvertent changes in the natural carbon cycle. As a consequence, concentrations of carbon dioxide and other greenhouse gases have increased in the atmosphere and may lead to changes in climate. The current challenge facing society is to develop options for future management of the carbon cycle. A variety of approaches has been suggested: direct reduction of emissions, deliberate manipulation of the natural carbon cycle to enhance sequestration, and capture and isolation of carbon from fossil fuel use. Policy development to date has laid out some of the general principles to which carbon management should adhere. These are summarized as: how much carbon is stored, by what means, and for how long. To successfully manage carbon for climate purposes requires increased understanding of carbon cycle dynamics and improvement in the scientific capabilities available for measurement as well as for policy needs. The specific needs for scientific information to underpin carbon cycle management decisions are not yet broadly known. A stronger dialogue between decision makers and scientists must be developed to foster improved application of scientific knowledge to decisions. This review focuses on the current knowledge of the carbon cycle, carbon measurement capabilities (with an emphasis on the continental scale) and the relevance of carbon cycle science to carbon sequestration goals.
    Description: The National Center for Atmospheric Research is supported by the National Science Foundation.
    Keywords: Carbon sequestration ; Measurement techniques ; Climate ; Kyoto protocol
    Repository Name: Woods Hole Open Access Server
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    Sedimentary evidence of hurricane strikes in western Long Island, New York (2007)
    American Geophysical Union
    Details
    Publication Date: 2022-05-25
    Description: Author Posting. © American Geophysical Union, 2007. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geochemistry Geophysics Geosystems 8 (2007): Q06011, doi:10.1029/2006GC001463.
    Description: Evidence of historical landfalling hurricanes and prehistoric storms has been recovered from backbarrier environments in the New York City area. Overwash deposits correlate with landfalls of the most intense documented hurricanes in the area, including the hurricanes of 1893, 1821, 1788, and 1693 A.D. There is little evidence of intense hurricane landfalls in the region for several hundred years prior to the late 17th century A.D. The apparent increase in intense hurricane landfalls around 300 years ago occurs during the latter half of the Little Ice Age, a time of lower tropical sea surface temperatures. Multiple washovers laid down between ~2200 and 900 cal yr B.P. suggest an interval of frequent intense hurricane landfalls in the region. Our results provide preliminary evidence that fluctuations in intense hurricane landfall in the northeastern United States were roughly synchronous with hurricane landfall fluctuations observed for the Caribbean and Gulf Coast, suggesting North Atlantic–wide changes in hurricane activity.
    Description: Grants from the National Science Foundation (EAR 0519118), Risk Prediction Initiative at the Bermuda Biological Station for Research, and the Coastal Ocean Institute of Woods Hole Oceanographic Institution supported this research.
    Keywords: Hurricane ; Climate ; Coastal geology ; Salt marsh ; Sedimentation ; New York
    Repository Name: Woods Hole Open Access Server
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    Climate variability of southern Chile since the Last Glacial Maximum : a continuous sedimentological record from Lago Puyehue (40°S) (2008)
    Details
    Publication Date: 2022-05-25
    Description: Author Posting. © Springer, 2007. This is the author's version of the work. It is posted here by permission of Springer for personal use, not for redistribution. The definitive version was published in Journal of Paleolimnology 39 (2008): 179-195, doi:10.1007/s10933-007-9117-y.
    Description: This paper presents a multi-proxy climate record of an 11 m long core collected in Lago Puyehue (southern Chile, 40°S) and extending back to 18,000 cal yr BP. The multi-proxy analyses include sedimentology, mineralogy, grain size, geochemistry, loss-on-ignition, magnetic susceptibility and radiocarbon datings. Results demonstrate that sediment grain size is positively correlated with the biogenic sediment content and can be used as a proxy for lake paleoproductivity. On the other hand, the magnetic susceptibility signal is correlated with the aluminium and titanium concentrations and can be used as a proxy for the terrigenous supply. Temporal variations of sediment composition evidence that, since the last glacial maximum, the Chilean Lake District was characterized by 3 abrupt climate changes superimposed on a long-term climate evolution. These rapid climate changes are: (1) an abrupt warming at the end of the last glacial maximum at 17,300 cal yr BP; (2) a 13,100-12,300 cal yr BP cold event, ending rapidly and interpreted as the local counter part of the Younger Dryas cold period, and (3) a 3400-2900 cal yr BP climatic instability synchronous with a period of low solar activity. The timing of the 13,100-12,300 cold event is compared with similar records in both hemispheres and demonstrates that this southern hemisphere climate change lags behind the northern hemisphere Younger Dryas cold period by 500 to 1000 years.
    Description: This research is supported by the Belgian OSTC project EV/12/10B "A continuous Holocene record of ENSO variability in southern Chile".
    Keywords: Sediment ; Lake ; Grain size ; Magnetic susceptibility ; Climate ; Younger Dryas ; South America
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    Report of the Regional Co-ordinator for the El Niño Region (2007)
    Details
    Publication Date: 2021-05-19
    Description: Supported by IOC/IODE
    Description: Sixteenth Session
    Keywords: Oceanography ; Climate
    Repository Name: AquaDocs
    Type: Non-Refereed , Paper
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    Stratus Ocean Reference Station (20˚S, 85˚W), mooring recovery and deployment cruise R/V Ronald H. Brown cruise 05-05, September 26, 2005–October 21, 2005 (2006)
    Woods Hole Oceanographic Institution
    Details
    Publication Date: 2022-05-26
    Description: The Ocean Reference Station at 20°S, 85°W under the stratus clouds west of northern Chile is being maintained to provide ongoing, climate-quality records of surface meteorology, of air-sea fluxes of heat, freshwater, and momentum, and of upper ocean temperature, salinity, and velocity variability. The Stratus Ocean Reference Station (ORS Stratus) is supported by the National Oceanic and Atmospheric Administration’s (NOAA) Climate Observation Program. It is recovered and redeployed annually, with cruises that have come between October and December. During the October 2005 cruise of NOAA’s R/V Ronald H. Brown to the ORS Stratus site, the primary activities were recovery of the WHOI surface mooring that had been deployed in December 2004, deployment of a new WHOI surface mooring at that site, in-situ calibration of the buoy meteorological sensors by comparison with instrumentation put on board by staff of the NOAA Environmental Technology Laboratory (ETL), and observations of the stratus clouds and lower atmosphere by NOAA ETL. The ORS Stratus buoys are equipped with two Improved Meteorological (IMET) systems, which provide surface wind speed and direction, air temperature, relative humidity, barometric pressure, incoming shortwave radiation, incoming longwave radiation, precipitation rate, and sea surface temperature. The IMET data are made available in near real time using satellite telemetry. The mooring line carries instruments to measure ocean salinity, temperature, and currents. The ETL instrumentation used during the 2005 cruise included cloud radar, radiosonde ballons, and sensors for mean and turbulent surface meteorology. In addition, two technicians from the University of Concepcion collected water samples for chemical analysis. Finally, the cruise hosted a teacher participating in NOAA’s Teacher at Sea Program.
    Description: Funding was provided by the National Oceanic and Atmospheric Administration under Grant No. NA17RJ1223 and the Cooperative Institute for Climate and Ocean Research (CICOR).
    Keywords: STRATUS ; Ocean ; Climate ; Ronald H. Brown (Ship) Cruise RB05-05
    Repository Name: Woods Hole Open Access Server
    Type: Technical Report
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    Updated Cariaco Basin C-14 calibration dataset from 0-60 cal kyr BP (2020)
    Cambridge University Press
    Details
    Publication Date: 2022-10-26
    Description: © The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Hughen, K. A., & Heaton, T. J. Updated Cariaco Basin C-14 calibration dataset from 0-60 cal kyr BP. Radiocarbon, 62(4), (2020): 1001-1043, doi:10.1017/RDC.2020.53.
    Description: We present new updates to the calendar and radiocarbon (14C) chronologies for the Cariaco Basin, Venezuela. Calendar ages were generated by tuning abrupt climate shifts in Cariaco Basin sediments to those in speleothems from Hulu Cave. After the original Cariaco-Hulu calendar age model was published, Hulu Cave δ18O records have been augmented with increased temporal resolution and a greater number of U/Th dates. These updated Hulu Cave records provide increased accuracy as well as precision in the final Cariaco calendar age model. The depth scale for the Ocean Drilling Program Site 1002D sediment core, the primary source of samples for 14C dating, has been corrected to account for missing sediment from a core break, eliminating age-depth anomalies that afflicted the earlier calendar age models. Individual 14C dates for the Cariaco Basin remain unchanged from previous papers, although detailed comparisons of the Cariaco calibration dataset to those from Hulu Cave and Lake Suigetsu suggest that the Cariaco marine reservoir age may have shifted systematically during the past. We describe these recent changes to the Cariaco datasets and provide the data in a comprehensive format that will facilitate use by the community.
    Description: K.A. Hughen was supported by funds from U.S. NSF grant #OCE-1657191, and by the Investment in Science Fund at WHOI. T.J. Heaton is supported by a Leverhulme Trust Fellowship RF-2019-140\9, “Improving the Measurement of Time Using Radiocarbon”.
    Keywords: Calibration ; Climate ; Radiocarbon
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    Coral reefs in the Anthropocene Ocean: novel insights from skeletal proxies of climate change, impacts, and resilience (2021)
    Massachusetts Institute of Technology and Woods Hole Oceanographic Institution
    Details
    Publication Date: 2022-10-20
    Description: Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Oceanography at the Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution February 2021.
    Description: Anthropogenic emissions of greenhouse gases are driving rapid changes in ocean conditions. Shallow-water coral reefs are experiencing the brunt of these changes, including intensifying marine heatwaves (MHWs) and rapid ocean acidification (OA). Consequently, coral reefs are in broad-scale decline, threatening the livelihoods of hundreds of millions of people. Ensuring survival of coral reefs in the 21st century will thus require a new management approach that incorporates robust understanding of reef-scale climate change, the mechanisms by which these changes impact corals, and their potential for adaptation. In this thesis, I extract information from within coral skeletons to 1) Quantify the climate changes occurring on coral reefs and the effects on coral growth, 2) Identify differences in the sensitivity of coral reefs to these changes, and 3) Evaluate the adaptation potential of the keystone reef-building coral, Porites. First, I develop a mechanistic Porites growth model and reveal the physicochemical link between OA and skeletal formation. I show that the thickening (densification) of coral skeletal framework is most vulnerable to OA and that, under 21st century climate model projections, OA will reduce Porites skeletal density globally, with greatest impact in the Coral Triangle. Second, I develop an improved metric of thermal stress, and use a skeletal bleaching proxy to quantify coral responses to intensifying heatwaves in the central equatorial Pacific (CEP) since 1982. My work reveals a long history of bleaching in the CEP, and reef-specific differences in thermal tolerance linked to past heatwave exposure implying that, over time, reef communities have adapted to tolerate their unique thermal regimes. Third, I refine the Sr-U paleo-thermometer to enable monthly-resolved sea surface temperatures (SST) generation using laser ablation ICPMS. I show that laser Sr-U accurately captures CEP SST, including the frequency and amplitude of MHWs. Finally, I apply laser Sr-U to reconstruct the past 100 years of SST at Jarvis Island in the CEP, and evaluate my proxy record of bleaching severity in this context. I determine that Porites coral populations on Jarvis Island have not yet adapted to the pace of anthropogenic climate change.
    Description: This research was supported by US National Science Foundation Awards OCE-1220529, ANT-1246387, OCE-1737311, CE-1601365, OCE-1805618, OCE-1537338, OCE-2016133, and from the Woods Hole Oceanographic Institution through the Ocean Life Institute, the Ocean Ventures Fund, the Grassle Fellowship Fund, and the MIT-WHOI Academic Programs Office. Additional funding was provided by the Taiwan MOST Grant 104-2628-M-001-007-MY3, the Robertson Foundation, the Leverhulme Trust in UK, the Atlantic Donor Advised Fund, The Prince Albert 2 of Monaco Foundation, the Akiko Shiraki Dynner Fund, the New England Aquarium, the Martin Family Society Fellowship for Sustainability, the Gates Millenium Scholarship, the Arthur Vining Davis Foundation, the NOAA Coral Reef Conservation Program, and from the Woods Hole Oceanographic Institution through Investment in Science Fund, the Early Career Award, and the Access to the Sea Award.
    Keywords: Coral reef ; Climate ; Proxy
    Repository Name: Woods Hole Open Access Server
    Type: Thesis
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    A preindustrial sea-level rise hotspot along the Atlantic Coast of North America (2020)
    American Geophysical Union
    Details
    Publication Date: 2022-10-26
    Description: © The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Gehrels, W. R., Dangendorf, S., Barlow, N. L. M., Saher, M. H., Long, A. J., Woodworth, P. L., Piecuch, C. G., & Berk, K. A preindustrial sea-level rise hotspot along the Atlantic Coast of North America. Geophysical Research Letters, 47(4), (2020): e2019GL085814, doi:10.1029/2019GL085814.
    Description: The Atlantic coast of North America north of Cape Hatteras has been proposed as a “hotspot” of late 20th century sea‐level rise. Here we test, using salt‐marsh proxy sea‐level records, if this coast experienced enhanced sea‐level rise over earlier multidecadal‐centennial periods. While we find in agreement with previous studies that 20th century rates of sea‐level change were higher compared to rates during preceding centuries, rates of 18th century sea‐level rise were only slightly lower, suggesting that the “hotspot” is a reoccurring feature for at least three centuries. Proxy sea‐level records from North America (Iceland) are negatively (positively) correlated with centennial changes in the North Atlantic Oscillation. They are consistent with sea‐level “fingerprints” of Arctic ice melt, and we therefore hypothesize that sea‐level fluctuations are related to changes in Arctic land‐ice mass. Predictions of future sea‐level rise should take into account these long‐term fluctuating rates of natural sea‐level change.
    Description: This work is funded by the Natural Environment Research Council (grant NE/G003440/1). All radiocarbon dating was supported by the Natural Environment Research Council Radiocarbon Facility (allocations 1490.0810, 1566.0511, 1604.0112). Mark Wood assisted with fieldwork. Rob Scaife analyzed pollen data for core SN‐3.3. Sönke Dangendorf and Kevin Berk acknowledge the University of Siegen for their support within the PEPSEA project. Christopher Piecuch was supported by National Science Foundation awards OCE‐1558966 and OCE‐1834739. We thank project members Miguel Ángel Morales Maqueda, Chris Hughes, Vassil Roussenov and Ric Williams for valuable discussions. We are grateful to the International Space Science Institute (ISSI; Bern, Switzerland) for support of the International Team “Towards a unified Sea Level Record”. Data used in this paper are freely available online (https://www.doi.org/10/dgvq).
    Keywords: Sea level ; Late Holocene ; Common Era ; Climate ; Ocean
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    Trends in physical properties at the southern New England shelf break (2020)
    American Geophysical Union
    Details
    Publication Date: 2022-10-26
    Description: Author Posting. © American Geophysical Union, 2020. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Oceans 125(2), (2020): e2019JC015784, doi:10.1029/2019JC015784.
    Description: We analyze 11 years (2003–2013) of repeat temperature and salinity sections from across the New England shelf break south of Cape Cod during early summer (June–July). The mean sections resolved the shelf break front which supports the Shelf Break Jet, a vital component of the regional circulation. Individual sections showed a great deal of variability associated with meanders in the shelf break front consistent with previous studies in the region. Over the 11 year record, the shelf region (inshore of the 100 m isobath) warmed by 0.26 °C yr -1, with the majority of this warming occurring shallower than 20 m (0.58 °C yr -1). The full‐depth trend agrees well with previous studies of shelf warming to the north and the south of our study region. The temperature and salinity of the offshore edge of the Cold Pool Water on the shelf did not change significantly during this period. The surface warming on the shelf resulted in a decrease in near‐surface density of 0.12 kg m -3 yr -1 and an increase in stratification between 10 and 15 m of 6.7 X 10(-5) S -2 yr -1 . Offshore of the shelf break, the Slope Water also warmed and became more saline by 0.21 °C yr -1 and 0.04 yr -1 respectively, resulting in a maximal reduction in density of 0.01 kg m -3 yr -1. In the Shelf Break Front, there is some evidence of freshening and a reduction in density, which may have resulted from an offshore shift in the Cold Pool but the statistical significance is small.
    Description: We wish to thank the Sea Education Association and the Woods Hole Oceanographic Institution for maintaining this collaboration. We also extend our warmest thanks to the numerous chief scientists, crew members, and student participants who collected the data and made this work possible. This work was supported by NSF Grants OCE‐1657853 and OCE‐1851261. G. G. was also supported by a Senior Scientist Chair from the Woods Hole Oceanographic Institution. The Jake Peirson Summer Cruises were supported using funds provided by a WHOI‐MIT Joint Program alumnus and by the WHOI Academic Programs Office. M. I. was supported by The Woods Hole Partnership Education Program, the Sea Education Association, and the Woods Hole Oceanographic Institution for her summer research work. We thank Jacob Forsyth for discussions on the seasonal variability of warming over the New Jersey shelf and warming rates for different time frames. Data used in this paper are available from the WHOI‐MBL Library (https://darchive.mblwhoilibrary.org/handle/1912/25158, doi:10.26025/dz4w‐kk13).
    Keywords: Temperature and salinity trends ; Stratification ; New England ; Shelf Break Jet ; Climate
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    Evidence for massive and recurrent toxic blooms of Alexandrium catenella in the Alaskan Arctic (2021)
    National Academy of Sciences
    Details
    Publication Date: 2022-10-26
    Description: © The Author(s), 2021. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Anderson, D. M., Fachon, E., Pickart, R. S., Lin, P., Fischer, A. D., Richlen, M. L., Uva, V., Brosnahan, M. L., McRaven, L., Bahr, F., Lefebvre, K., Grebmeier, J. M., Danielson, S. L., Lyu, Y., & Fukai, Y. Evidence for massive and recurrent toxic blooms of Alexandrium catenella in the Alaskan Arctic. Proceedings of the National Academy of Sciences of the United States of America, 118(41) (2021): e2107387118, https://doi.org/10.1073/pnas.2107387118.
    Description: Among the organisms that spread into and flourish in Arctic waters with rising temperatures and sea ice loss are toxic algae, a group of harmful algal bloom species that produce potent biotoxins. Alexandrium catenella, a cyst-forming dinoflagellate that causes paralytic shellfish poisoning worldwide, has been a significant threat to human health in southeastern Alaska for centuries. It is known to be transported into Arctic regions in waters transiting northward through the Bering Strait, yet there is little recognition of this organism as a human health concern north of the Strait. Here, we describe an exceptionally large A. catenella benthic cyst bed and hydrographic conditions across the Chukchi Sea that support germination and development of recurrent, locally originating and self-seeding blooms. Two prominent cyst accumulation zones result from deposition promoted by weak circulation. Cyst concentrations are among the highest reported globally for this species, and the cyst bed is at least 6× larger in area than any other. These extraordinary accumulations are attributed to repeated inputs from advected southern blooms and to localized cyst formation and deposition. Over the past two decades, warming has likely increased the magnitude of the germination flux twofold and advanced the timing of cell inoculation into the euphotic zone by 20 d. Conditions are also now favorable for bloom development in surface waters. The region is poised to support annually recurrent A. catenella blooms that are massive in scale, posing a significant and worrisome threat to public and ecosystem health in Alaskan Arctic communities where economies are subsistence based.
    Description: Funding for D.M.A., R.S.P., E.F., P.L., A.D.F., V.U., M.L.B., L.M., F.B., and M.L.R. was provided by grants from the NSF Office of Polar Programs (Grants OPP-1823002 and OPP-1733564) and the National Ocanic and Atmospheric Administration (NOAA) Arctic Research program (through the Cooperative Institute for the North Atlantic Region [CINAR; Grants NA14OAR4320158 and NA19OAR4320074]), for J.M.G. through CINAR 22309.07 UMCES (University of Maryland Center for Environmental Science), and for D.M.A. and K.L. through NOAA’s Center for Coastal and Ocean Studies Ecology and Oceanography of Harmful Algal Blooms (ECOHAB) Program (NA20NOS4780195). Funding for D.M.A., M.L.R., M.L.B., E.F., V.U., and A.D.F. was also provided by NSF (Grant OCE-1840381) and NIH (Grant 1P01-ES028938-01) through the Woods Hole Center for Oceans and Human Health. S.L.D. was supported by North Pacific Research Board IERP Grants A91-99a and A91-00a. This is IERP publication ArcticIERP-41 and ECOHAB Contribution No. ECO983.
    Keywords: Harmful algal bloom ; HAB ; Alexandrium ; Alaskan Arctic ; Climate
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    Strong margin influence on the Arctic Ocean Barium Cycle revealed by pan‐Arctic synthesis (2022)
    American Geophysical Union
    Details
    Publication Date: 2022-10-26
    Description: © The Author(s), 2022. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Whitmore, L., Shiller, A., Horner, T., Xiang, Y., Auro, M., Bauch, D., Dehairs, F., Lam, P., Li, J., Maldonado, M., Mears, C., Newton, R., Pasqualini, A., Planquette, H., Rember, R., & Thomas, H. Strong margin influence on the Arctic Ocean Barium Cycle revealed by pan‐Arctic synthesis. Journal of Geophysical Research: Oceans, 127(4), (2022): e2021JC017417, https://doi.org/10.1029/2021jc017417.
    Description: Early studies revealed relationships between barium (Ba), particulate organic carbon and silicate, suggesting applications for Ba as a paleoproductivity tracer and as a tracer of modern ocean circulation. But, what controls the distribution of barium (Ba) in the oceans? Here, we investigated the Arctic Ocean Ba cycle through a one-of-a-kind data set containing dissolved (dBa), particulate (pBa), and stable isotope Ba ratio (δ138Ba) data from four Arctic GEOTRACES expeditions conducted in 2015. We hypothesized that margins would be a substantial source of Ba to the Arctic Ocean water column. The dBa, pBa, and δ138Ba distributions all suggest significant modification of inflowing Pacific seawater over the shelves, and the dBa mass balance implies that ∼50% of the dBa inventory (upper 500 m of the Arctic water column) was supplied by nonconservative inputs. Calculated areal dBa fluxes are up to 10 μmol m−2 day−1 on the margin, which is comparable to fluxes described in other regions. Applying this approach to dBa data from the 1994 Arctic Ocean Survey yields similar results. The Canadian Arctic Archipelago did not appear to have a similar margin source; rather, the dBa distribution in this section is consistent with mixing of Arctic Ocean-derived waters and Baffin Bay-derived waters. Although we lack enough information to identify the specifics of the shelf sediment Ba source, we suspect that a sedimentary remineralization and terrigenous sources (e.g., submarine groundwater discharge or fluvial particles) are contributors.
    Description: This research was supported by the National Science Foundation [OCE-1434312 (AMS), OCE-1436666 (RN), OCE-1535854 (PL), OCE-1736949, OCE-2023456 (TJH), and OCE-1829563 (R. Anderson for open access support)], Natural Sciences and Engineering Research Council of Canada (NSERC)-Climate Change and Atmospheric Research (CCAR) Program (MTM), and LEFE-CYBER EXPATE (HP). HT acknowledges support by the Canadian GEOTRACES via NSERC-CCAR and the German Academic Exchange Service (DAAD): MOPGA-GRI (Make Our Planet Great Again—Research Initiative) sponsored by BMBF (Federal German Ministry of Education and Research; Grant No. 57429828).
    Keywords: GEOTRACES ; Barium isotopes ; Geochemical cycles ; Climate ; Continental shelves
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    The ocean twilight zone’s role in climate change (2022)
    Woods Hole Oceanographic Institution
    Details
    Publication Date: 2022-05-27
    Description: Buesseler, K., Jin, D., Kourantidou, M., Levin, D., Ramakrishna, K., Renaud, P., Ausubel, J., Baltes, K., Gjerde, K., Holland, M., Kostel, K., LaCapra, V., Martin, A., Sosik, H., Thorrold, S., Tierney, T., Joyce, K., Renier, N., Taylor, E. (2022). The Ocean Twilight Zone’s Role in Climate Change. Woods Hole Oceanographic Institution, 32 pp.
    Description: The ocean twilight zone (more formally known as the mesopelagic zone) plays a fundamental role in global climate. It is the mid-ocean region roughly 100 to 1000 meters below the surface, encompassing a half-mile deep belt of water that spans more than two-thirds of our planet. The top of the ocean twilight zone only receives 1% of incident sunlight and the bottom level is void of sunlight. Life in the ocean twilight zone helps to transport billions of metric tons (gigatonnes) of carbon annually from the upper ocean into the deep sea, due in part to processes known as the biological carbon pump. Once carbon moves below roughly 1000 meters depth in the ocean, it can remain out of the atmosphere for centuries to millennia. Without the benefits of the biological carbon pump, the atmospheric CO 2 concentration would increase by approximately 200 ppm 1 which would significantly amplify the negative effects of climate change that the world is currently trying to curtail and reverse. Unfortunately, existing scientific knowledge about this vast zone of the ocean, such as how chemical elements flow through its living systems and the physical environment, is extremely limited, jeopardizing the efforts to improve climate predictions and to inform fisheries management and ocean policy development.
    Description: Funding is: The Audacious Project housed at TED
    Keywords: Climate ; Mesopelagic ; Twilight Zone ; Fisheries ; Carbon Dioxide Removal ; Ocean ; Biological Carbon Pump ; Solubility Pump ; Carbon ; Marine Snow
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    Late Pliocene Greenland glaciation controlled by a decline in atmospheric CO2 levels (2008)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2008-08-30
    Description: It is thought that the Northern Hemisphere experienced only ephemeral glaciations from the Late Eocene to the Early Pliocene epochs (about 38 to 4 million years ago), and that the onset of extensive glaciations did not occur until about 3 million years ago. Several hypotheses have been proposed to explain this increase in Northern Hemisphere glaciation during the Late Pliocene. Here we use a fully coupled atmosphere-ocean general circulation model and an ice-sheet model to assess the impact of the proposed driving mechanisms for glaciation and the influence of orbital variations on the development of the Greenland ice sheet in particular. We find that Greenland glaciation is mainly controlled by a decrease in atmospheric carbon dioxide during the Late Pliocene. By contrast, our model results suggest that climatic shifts associated with the tectonically driven closure of the Panama seaway, with the termination of a permanent El Nino state or with tectonic uplift are not large enough to contribute significantly to the growth of the Greenland ice sheet; moreover, we find that none of these processes acted as a priming mechanism for glacial inception triggered by variations in the Earth's orbit.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lunt, Daniel J -- Foster, Gavin L -- Haywood, Alan M -- Stone, Emma J -- England -- Nature. 2008 Aug 28;454(7208):1102-5. doi: 10.1038/nature07223.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉BRIDGE, School of Geographical Sciences, University of Bristol, University Road, Bristol BS8 1SS, UK. d.j.lunt@bristol.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18756254" target="_blank"〉PubMed〈/a〉
    Keywords: Atmosphere/*chemistry ; Carbon Dioxide/analysis/*metabolism ; Climate ; Greenland ; History, Ancient ; *Ice Cover ; North America ; Rain ; Time Factors
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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    Biogeochemistry: nitrous oxide in flux (2008)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2008-12-19
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Billings, Sharon A -- England -- Nature. 2008 Dec 18;456(7224):888-9. doi: 10.1038/456888a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19092923" target="_blank"〉PubMed〈/a〉
    Keywords: Atmosphere/chemistry ; Climate ; Droughts ; Europe ; Humidity ; Nitrous Oxide/*metabolism ; Picea/metabolism ; Rain ; Soil/*analysis ; Trees/*metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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    Megacity project seeks to gauge urban pollution (2008)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2008-09-12
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Butler, Declan -- England -- Nature. 2008 Sep 11;455(7210):142-3. doi: 10.1038/455142b.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18784680" target="_blank"〉PubMed〈/a〉
    Keywords: Air Pollution/*statistics & numerical data ; Cities/*statistics & numerical data ; City Planning/trends ; Climate ; Data Collection/economics ; Databases, Factual ; Europe ; Models, Theoretical ; Population Density
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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    Holocene oscillations in temperature and salinity of the surface subpolar North Atlantic (2009)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2009-02-06
    Description: The Atlantic meridional overturning circulation (AMOC) transports warm salty surface waters to high latitudes, where they cool, sink and return southwards at depth. Through its attendant meridional heat transport, the AMOC helps maintain a warm northwestern European climate, and acts as a control on the global climate. Past climate fluctuations during the Holocene epoch ( approximately 11,700 years ago to the present) have been linked with changes in North Atlantic Ocean circulation. The behaviour of the surface flowing salty water that helped drive overturning during past climatic changes is, however, not well known. Here we investigate the temperature and salinity changes of a substantial surface inflow to a region of deep-water formation throughout the Holocene. We find that the inflow has undergone millennial-scale variations in temperature and salinity ( approximately 3.5 degrees C and approximately 1.5 practical salinity units, respectively) most probably controlled by subpolar gyre dynamics. The temperature and salinity variations correlate with previously reported periods of rapid climate change. The inflow becomes more saline during enhanced freshwater flux to the subpolar North Atlantic. Model studies predict a weakening of AMOC in response to enhanced Arctic freshwater fluxes, although the inflow can compensate on decadal timescales by becoming more saline. Our data suggest that such a negative feedback mechanism may have operated during past intervals of climate change.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Thornalley, David J R -- Elderfield, Harry -- McCave, I Nick -- England -- Nature. 2009 Feb 5;457(7230):711-4. doi: 10.1038/nature07717.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Godwin Laboratory for Palaeoclimate Research, Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK. d.thornalley@cantab.net〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19194447" target="_blank"〉PubMed〈/a〉
    Keywords: Atlantic Ocean ; Calcium Carbonate/analysis ; Climate ; Feedback ; Fresh Water/analysis/chemistry ; History, Ancient ; Oxygen Isotopes ; Plankton/metabolism ; *Salinity ; Seawater/*chemistry ; *Temperature ; *Water Movements
    Print ISSN: 0028-0836
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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    Archaeology: Maya, Khmer and Inca (2009)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2009-09-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Diamond, Jared -- England -- Nature. 2009 Sep 24;461(7263):479-80. doi: 10.1038/461479a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19779438" target="_blank"〉PubMed〈/a〉
    Keywords: Agriculture/history ; Animals ; Archaeology ; Cambodia ; Central America ; Civilization/*history ; Climate ; Droughts ; Forestry/*history ; History, 15th Century ; History, 16th Century ; History, 17th Century ; History, Medieval ; Population Density ; South America ; Trees/growth & development ; Wood/history
    Print ISSN: 0028-0836
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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    Early-warning signals for critical transitions (2009)
    Nature Publishing Group (NPG)
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    Publication Date: 2009-09-04
    Description: Complex dynamical systems, ranging from ecosystems to financial markets and the climate, can have tipping points at which a sudden shift to a contrasting dynamical regime may occur. Although predicting such critical points before they are reached is extremely difficult, work in different scientific fields is now suggesting the existence of generic early-warning signals that may indicate for a wide class of systems if a critical threshold is approaching.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Scheffer, Marten -- Bascompte, Jordi -- Brock, William A -- Brovkin, Victor -- Carpenter, Stephen R -- Dakos, Vasilis -- Held, Hermann -- van Nes, Egbert H -- Rietkerk, Max -- Sugihara, George -- England -- Nature. 2009 Sep 3;461(7260):53-9. doi: 10.1038/nature08227.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Environmental Sciences, Wageningen University, PO Box 47, 6700 AA Wageningen, The Netherlands. marten.scheffer@wur.nl〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19727193" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Asthma/physiopathology ; Climate ; *Ecosystem ; Eutrophication ; Extinction, Biological ; Humans ; *Models, Biological ; *Models, Economic ; Seizures/physiopathology ; Stochastic Processes
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    Stable isotope constraints on Holocene carbon cycle changes from an Antarctic ice core (2009)
    Nature Publishing Group (NPG)
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    Publication Date: 2009-09-26
    Description: Reconstructions of atmospheric CO(2) concentrations based on Antarctic ice cores reveal significant changes during the Holocene epoch, but the processes responsible for these changes in CO(2) concentrations have not been unambiguously identified. Distinct characteristics in the carbon isotope signatures of the major carbon reservoirs (ocean, biosphere, sediments and atmosphere) constrain variations in the CO(2) fluxes between those reservoirs. Here we present a highly resolved atmospheric delta(13)C record for the past 11,000 years from measurements on atmospheric CO(2) trapped in an Antarctic ice core. From mass-balance inverse model calculations performed with a simplified carbon cycle model, we show that the decrease in atmospheric CO(2) of about 5 parts per million by volume (p.p.m.v.). The increase in delta(13)C of about 0.25 per thousand during the early Holocene is most probably the result of a combination of carbon uptake of about 290 gigatonnes of carbon by the land biosphere and carbon release from the ocean in response to carbonate compensation of the terrestrial uptake during the termination of the last ice age. The 20 p.p.m.v. increase of atmospheric CO(2) and the small decrease in delta(13)C of about 0.05 per thousand during the later Holocene can mostly be explained by contributions from carbonate compensation of earlier land-biosphere uptake and coral reef formation, with only a minor contribution from a small decrease of the land-biosphere carbon inventory.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Elsig, Joachim -- Schmitt, Jochen -- Leuenberger, Daiana -- Schneider, Robert -- Eyer, Marc -- Leuenberger, Markus -- Joos, Fortunat -- Fischer, Hubertus -- Stocker, Thomas F -- England -- Nature. 2009 Sep 24;461(7263):507-10. doi: 10.1038/nature08393.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Climate and Environmental Physics, Physics Institute, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19779448" target="_blank"〉PubMed〈/a〉
    Keywords: Air/analysis ; Animals ; Antarctic Regions ; Anthozoa/growth & development/metabolism ; Atmosphere/chemistry ; Carbon/*analysis/*metabolism ; Carbon Dioxide/analysis/*metabolism ; Carbon Isotopes ; Climate ; Ecosystem ; History, Ancient ; Ice Cover/*chemistry ; Time Factors
    Print ISSN: 0028-0836
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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    Observed variations of methane on Mars unexplained by known atmospheric chemistry and physics (2009)
    Nature Publishing Group (NPG)
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    Publication Date: 2009-08-08
    Description: The detection of methane on Mars has revived the possibility of past or extant life on this planet, despite the fact that an abiogenic origin is thought to be equally plausible. An intriguing aspect of the recent observations of methane on Mars is that methane concentrations appear to be locally enhanced and change with the seasons. However, methane has a photochemical lifetime of several centuries, and is therefore expected to have a spatially uniform distribution on the planet. Here we use a global climate model of Mars with coupled chemistry to examine the implications of the recently observed variations of Martian methane for our understanding of the chemistry of methane. We find that photochemistry as currently understood does not produce measurable variations in methane concentrations, even in the case of a current, local and episodic methane release. In contrast, we find that the condensation-sublimation cycle of Mars' carbon dioxide atmosphere can generate large-scale methane variations differing from those observed. In order to reproduce local methane enhancements similar to those recently reported, we show that an atmospheric lifetime of less than 200 days is necessary, even if a local source of methane is only active around the time of the observation itself. This implies an unidentified methane loss process that is 600 times faster than predicted by standard photochemistry. The existence of such a fast loss in the Martian atmosphere is difficult to reconcile with the observed distribution of other trace gas species. In the case of a destruction mechanism only active at the surface of Mars, destruction of methane must occur with an even shorter timescale of the order of approximately 1 hour to explain the observations. If recent observations of spatial and temporal variations of methane are confirmed, this would suggest an extraordinarily harsh environment for the survival of organics on the planet.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lefevre, Franck -- Forget, Francois -- England -- Nature. 2009 Aug 6;460(7256):720-3. doi: 10.1038/nature08228.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉LATMOS, UPMC Universite Paris 06, CNRS, Paris 75005, France. franck.lefevre@upmc.fr〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19661912" target="_blank"〉PubMed〈/a〉
    Keywords: Atmosphere/chemistry ; Carbon Dioxide/analysis ; Climate ; Electrochemistry ; Exobiology ; Extraterrestrial Environment/*chemistry ; *Mars ; Methane/*analysis ; Models, Chemical ; Photochemistry ; Time Factors
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    The role of terrestrial plants in limiting atmospheric CO(2) decline over the past 24 million years (2009)
    Nature Publishing Group (NPG)
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    Publication Date: 2009-07-03
    Description: Environmental conditions during the past 24 million years are thought to have been favourable for enhanced rates of atmospheric carbon dioxide drawdown by silicate chemical weathering. Proxy records indicate, however, that the Earth's atmospheric carbon dioxide concentrations did not fall below about 200-250 parts per million during this period. The stabilization of atmospheric carbon dioxide concentrations near this minimum value suggests that strong negative feedback mechanisms inhibited further drawdown of atmospheric carbon dioxide by high rates of global silicate rock weathering. Here we investigate one possible negative feedback mechanism, occurring under relatively low carbon dioxide concentrations and in warm climates, that is related to terrestrial plant productivity and its role in the decomposition of silicate minerals. We use simulations of terrestrial and geochemical carbon cycles and available experimental evidence to show that vegetation activity in upland regions of active orogens was severely limited by near-starvation of carbon dioxide in combination with global warmth over this period. These conditions diminished biotic-driven silicate rock weathering and thereby attenuated an important long-term carbon dioxide sink. Although our modelling results are semi-quantitative and do not capture the full range of biogeochemical feedbacks that could influence the climate, our analysis indicates that the dynamic equilibrium between plants, climate and the geosphere probably buffered the minimum atmospheric carbon dioxide concentrations over the past 24 million years.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pagani, Mark -- Caldeira, Ken -- Berner, Robert -- Beerling, David J -- England -- Nature. 2009 Jul 2;460(7251):85-8. doi: 10.1038/nature08133.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Geology and Geophysics, Yale University, New Haven, Connecticut 06520, USA. mark.pagani@yale.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19571882" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Atmosphere/*chemistry ; Biomass ; Carbon Dioxide/*analysis ; Climate ; Eukaryota ; Geologic Sediments/*chemistry ; Geology ; History, Ancient ; Ice Cover ; Models, Biological ; Plant Leaves/metabolism ; Plant Roots/growth & development ; Plant Transpiration ; Plants/*metabolism ; Silicates/*chemistry
    Print ISSN: 0028-0836
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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    Early Palaeogene temperature evolution of the southwest Pacific Ocean (2009)
    Nature Publishing Group (NPG)
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    Publication Date: 2009-10-09
    Description: Relative to the present day, meridional temperature gradients in the Early Eocene age ( approximately 56-53 Myr ago) were unusually low, with slightly warmer equatorial regions but with much warmer subtropical Arctic and mid-latitude climates. By the end of the Eocene epoch ( approximately 34 Myr ago), the first major Antarctic ice sheets had appeared, suggesting that major cooling had taken place. Yet the global transition into this icehouse climate remains poorly constrained, as only a few temperature records are available portraying the Cenozoic climatic evolution of the high southern latitudes. Here we present a uniquely continuous and chronostratigraphically well-calibrated TEX(86) record of sea surface temperature (SST) from an ocean sediment core in the East Tasman Plateau (palaeolatitude approximately 65 degrees S). We show that southwest Pacific SSTs rose above present-day tropical values (to approximately 34 degrees C) during the Early Eocene age ( approximately 53 Myr ago) and had gradually decreased to about 21 degrees C by the early Late Eocene age ( approximately 36 Myr ago). Our results imply that there was almost no latitudinal SST gradient between subequatorial and subpolar regions during the Early Eocene age (55-50 Myr ago). Thereafter, the latitudinal gradient markedly increased. In theory, if Eocene cooling was largely driven by a decrease in atmospheric greenhouse gas concentration, additional processes are required to explain the relative stability of tropical SSTs given that there was more significant cooling at higher latitudes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bijl, Peter K -- Schouten, Stefan -- Sluijs, Appy -- Reichart, Gert-Jan -- Zachos, James C -- Brinkhuis, Henk -- England -- Nature. 2009 Oct 8;461(7265):776-9. doi: 10.1038/nature08399.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Palaeoecology, Institute of Environmental Biology, Faculty of Science, Laboratory of Palaeobotany and Palynology, Utrecht University, Budapestlaan 4, 3584 CD Utrecht, The Netherlands. p.k.bijl@uu.nl〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19812670" target="_blank"〉PubMed〈/a〉
    Keywords: Antarctic Regions ; Biological Evolution ; Climate ; Geologic Sediments/analysis/chemistry ; History, Ancient ; Ice Cover ; Oxygen Isotopes ; Pacific Ocean ; Plankton/metabolism ; Seawater/*analysis ; *Temperature ; Water Movements
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    Biogeochemistry: Climatic plant power (2009)
    Nature Publishing Group (NPG)
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    Publication Date: 2009-07-03
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Godderis, Yves -- Donnadieu, Yannick -- England -- Nature. 2009 Jul 2;460(7251):40-1. doi: 10.1038/460040a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19571871" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Atmosphere/*chemistry ; Carbon Dioxide/*analysis/chemistry ; Climate ; Geologic Sediments/*chemistry ; History, Ancient ; Plants/*metabolism
    Print ISSN: 0028-0836
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    Isotopic evidence for dietary variability in the early hominin Paranthropus robustus (2006)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2006-11-11
    Description: Traditional methods of dietary reconstruction do not allow the investigation of dietary variability within the lifetimes of individual hominins. However, laser ablation stable isotope analysis reveals that the delta13C values of Paranthropus robustus individuals often changed seasonally and interannually. These data suggest that Paranthropus was not a dietary specialist and that by about 1.8 million years ago, savanna-based foods such as grasses or sedges or animals eating these foods made up an important but highly variable part of its diet.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sponheimer, Matt -- Passey, Benjamin H -- de Ruiter, Darryl J -- Guatelli-Steinberg, Debbie -- Cerling, Thure E -- Lee-Thorp, Julia A -- New York, N.Y. -- Science. 2006 Nov 10;314(5801):980-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Anthropology, University of Colorado at Boulder, Boulder, CO 80309, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17095699" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Carbon Isotopes/*analysis ; Climate ; Dental Enamel/*chemistry ; *Diet ; Ecosystem ; *Fossils ; *Hominidae ; Lasers ; *Paleodontology ; Plants ; Poaceae ; Rain ; Seasons ; South Africa
    Print ISSN: 0036-8075
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    Ecology. Photosymbiosis and the evolution of modern coral reefs (2006)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2006-05-13
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stanley, George D Jr -- New York, N.Y. -- Science. 2006 May 12;312(5775):857-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉University of Montana Paleontology Center, Missoula, MT 59812, USA. george.stanley@umontana.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16690848" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptation, Physiological ; Animals ; Anthozoa/growth & development/*physiology ; *Biological Evolution ; Calcification, Physiologic ; Calcium Carbonate/metabolism ; Carbon Dioxide/metabolism ; Climate ; *Ecosystem ; Eukaryota/growth & development/*physiology ; Fossils ; Photosynthesis ; Sunlight ; *Symbiosis
    Print ISSN: 0036-8075
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    Group competition, reproductive leveling, and the evolution of human altruism (2006)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2006-12-13
    Description: Humans behave altruistically in natural settings and experiments. A possible explanation-that groups with more altruists survive when groups compete-has long been judged untenable on empirical grounds for most species. But there have been no empirical tests of this explanation for humans. My empirical estimates show that genetic differences between early human groups are likely to have been great enough so that lethal intergroup competition could account for the evolution of altruism. Crucial to this process were distinctive human practices such as sharing food beyond the immediate family, monogamy, and other forms of reproductive leveling. These culturally transmitted practices presuppose advanced cognitive and linguistic capacities, possibly accounting for the distinctive forms of altruism found in our species.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bowles, Samuel -- New York, N.Y. -- Science. 2006 Dec 8;314(5805):1569-72.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Santa Fe Institute, 1399 Hyde Park Road, Santa Fe, NM 87501, USA, and Universita di Siena, 17 Piazza San Francesco, Siena, Italy. bowles@santafe.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17158320" target="_blank"〉PubMed〈/a〉
    Keywords: *Altruism ; Archaeology ; *Biological Evolution ; Climate ; *Competitive Behavior ; Cultural Evolution ; Genetic Variation ; Genetics, Population ; *Group Processes ; Humans ; Mathematics ; Models, Theoretical ; Population Dynamics ; *Reproduction ; Selection, Genetic ; Violence ; Warfare
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    Reefs of the deep: the biology and geology of cold-water coral ecosystems (2006)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2006-04-29
    Description: Coral reefs are generally associated with shallow tropical seas; however, recent deep-ocean exploration using advanced acoustics and submersibles has revealed unexpectedly widespread and diverse coral ecosystems in deep waters on continental shelves, slopes, seamounts, and ridge systems around the world. Advances reviewed here include the use of corals as paleoclimatic archives and their biogeological functioning, biodiversity, and biogeography. Threats to these fragile, long-lived, and rich ecosystems are mounting: The impacts of deep-water trawling are already widespread, and effects of ocean acidification are potentially devastating.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Roberts, J Murray -- Wheeler, Andrew J -- Freiwald, Andre -- New York, N.Y. -- Science. 2006 Apr 28;312(5773):543-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Scottish Association for Marine Science, Dunstaffnage Marine Laboratory, Oban, Argyll, PA37 1QA, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16645087" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Anthozoa/growth & development ; *Biodiversity ; Climate ; *Cold Temperature ; Conservation of Natural Resources ; *Ecosystem ; Environment ; Fishes ; Genetics, Population ; Geologic Sediments ; Hydrogen-Ion Concentration ; *Seawater ; Time
    Print ISSN: 0036-8075
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    Back to the people (2006)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2006-08-12
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kennedy, Donald -- New York, N.Y. -- Science. 2006 Aug 11;313(5788):733.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16902092" target="_blank"〉PubMed〈/a〉
    Keywords: Climate ; Embryo Research/*legislation & jurisprudence ; Embryo, Mammalian/cytology ; Financing, Government ; Humans ; Politics ; Research Support as Topic/*legislation & jurisprudence ; *Stem Cells ; United States ; Vehicle Emissions/legislation & jurisprudence
    Print ISSN: 0036-8075
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    Hydroengineering. Going against the flow (2006)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2006-08-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stone, Richard -- Jia, Hawk -- New York, N.Y. -- Science. 2006 Aug 25;313(5790):1034-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16931733" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biodiversity ; China ; Climate ; Conservation of Natural Resources ; Costs and Cost Analysis ; *Ecosystem ; *Engineering/economics ; Humans ; *Rivers ; Schistosomiasis/prevention & control ; Seasons ; Snails/parasitology ; Water Movements ; Water Pollution ; *Water Supply
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Global hydrological cycles and world water resources (2006)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2006-08-26
    Description: Water is a naturally circulating resource that is constantly recharged. Therefore, even though the stocks of water in natural and artificial reservoirs are helpful to increase the available water resources for human society, the flow of water should be the main focus in water resources assessments. The climate system puts an upper limit on the circulation rate of available renewable freshwater resources (RFWR). Although current global withdrawals are well below the upper limit, more than two billion people live in highly water-stressed areas because of the uneven distribution of RFWR in time and space. Climate change is expected to accelerate water cycles and thereby increase the available RFWR. This would slow down the increase of people living under water stress; however, changes in seasonal patterns and increasing probability of extreme events may offset this effect. Reducing current vulnerability will be the first step to prepare for such anticipated changes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Oki, Taikan -- Kanae, Shinjiro -- New York, N.Y. -- Science. 2006 Aug 25;313(5790):1068-72.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan. taikan@iis.u-tokyo.ac.jp〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16931749" target="_blank"〉PubMed〈/a〉
    Keywords: Agriculture ; Animals ; Climate ; *Fresh Water ; Humans ; Industry ; Rivers ; Water Purification ; *Water Supply ; Weather
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    Climate science. U.S. Supreme Court gets arguments for EPA to regulate CO2 (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-09-09
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kintisch, Eli -- New York, N.Y. -- Science. 2006 Sep 8;313(5792):1375.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16959983" target="_blank"〉PubMed〈/a〉
    Keywords: Air Pollution/*legislation & jurisprudence ; *Carbon Dioxide ; Climate ; *Greenhouse Effect ; Massachusetts ; United States ; United States Environmental Protection Agency/*legislation & jurisprudence
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Plant science. Seeking agriculture's ancient roots (2007)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2007-06-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Balter, Michael -- New York, N.Y. -- Science. 2007 Jun 29;316(5833):1830-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17600193" target="_blank"〉PubMed〈/a〉
    Keywords: Agriculture/*history ; *Archaeology ; Climate ; Crops, Agricultural/genetics/*history ; History, Ancient ; Humans ; Plants/genetics ; Selection, Genetic ; Time
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    Global-scale similarities in nitrogen release patterns during long-term decomposition (2007)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2007-01-20
    Description: Litter decomposition provides the primary source of mineral nitrogen (N) for biological activity in most terrestrial ecosystems. A 10-year decomposition experiment in 21 sites from seven biomes found that net N release from leaf litter is dominantly driven by the initial tissue N concentration and mass remaining regardless of climate, edaphic conditions, or biota. Arid grasslands exposed to high ultraviolet radiation were an exception, where net N release was insensitive to initial N. Roots released N linearly with decomposition and exhibited little net N immobilization. We suggest that fundamental constraints on decomposer physiologies lead to predictable global-scale patterns in net N release during decomposition.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Parton, William -- Silver, Whendee L -- Burke, Ingrid C -- Grassens, Leo -- Harmon, Mark E -- Currie, William S -- King, Jennifer Y -- Adair, E Carol -- Brandt, Leslie A -- Hart, Stephen C -- Fasth, Becky -- New York, N.Y. -- Science. 2007 Jan 19;315(5810):361-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Natural Resource Ecology Laboratory, Colorado State University, 200 West Lake, Campus Mail 1499, Fort Collins, CO 80523-1499, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17234944" target="_blank"〉PubMed〈/a〉
    Keywords: *Biodegradation, Environmental ; Carbon/metabolism ; Climate ; *Ecosystem ; Humidity ; Mathematics ; Nitrogen/*metabolism ; Plant Leaves/metabolism ; Plant Roots/metabolism ; Plants/*metabolism ; Poaceae ; Regression Analysis ; Seasons ; Soil Microbiology ; Temperature ; Time Factors ; Trees
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    Ancient biomolecules from deep ice cores reveal a forested southern Greenland (2007)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2007-07-07
    Description: It is difficult to obtain fossil data from the 10% of Earth's terrestrial surface that is covered by thick glaciers and ice sheets, and hence, knowledge of the paleoenvironments of these regions has remained limited. We show that DNA and amino acids from buried organisms can be recovered from the basal sections of deep ice cores, enabling reconstructions of past flora and fauna. We show that high-altitude southern Greenland, currently lying below more than 2 kilometers of ice, was inhabited by a diverse array of conifer trees and insects within the past million years. The results provide direct evidence in support of a forested southern Greenland and suggest that many deep ice cores may contain genetic records of paleoenvironments in their basal sections.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2694912/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2694912/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Willerslev, Eske -- Cappellini, Enrico -- Boomsma, Wouter -- Nielsen, Rasmus -- Hebsgaard, Martin B -- Brand, Tina B -- Hofreiter, Michael -- Bunce, Michael -- Poinar, Hendrik N -- Dahl-Jensen, Dorthe -- Johnsen, Sigfus -- Steffensen, Jorgen Peder -- Bennike, Ole -- Schwenninger, Jean-Luc -- Nathan, Roger -- Armitage, Simon -- de Hoog, Cees-Jan -- Alfimov, Vasily -- Christl, Marcus -- Beer, Juerg -- Muscheler, Raimund -- Barker, Joel -- Sharp, Martin -- Penkman, Kirsty E H -- Haile, James -- Taberlet, Pierre -- Gilbert, M Thomas P -- Casoli, Antonella -- Campani, Elisa -- Collins, Matthew J -- 076905/Wellcome Trust/United Kingdom -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 2007 Jul 6;317(5834):111-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Centre for Ancient Genetics, University of Copenhagen, Denmark. ewillerslev@bi.ku.dk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17615355" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acids/*analysis/history/isolation & purification ; Animals ; Bayes Theorem ; Climate ; DNA/*analysis/history/isolation & purification ; *Ecosystem ; Fossils ; Geography ; Greenland ; History, Ancient ; Ice Cover/*chemistry ; *Invertebrates/classification/genetics ; *Plants/classification/genetics ; Polymerase Chain Reaction ; Time ; *Trees
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    A sustainable future, if we pay up front (2007)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2007-02-10
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Clery, Daniel -- New York, N.Y. -- Science. 2007 Feb 9;315(5813):782-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17289970" target="_blank"〉PubMed〈/a〉
    Keywords: Climate ; *Conservation of Energy Resources ; *Energy-Generating Resources ; Europe ; Fossil Fuels ; *Research ; United States
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    Evolution and development of inflorescence architectures (2007)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2007-05-26
    Description: To understand the constraints on biological diversity, we analyzed how selection and development interact to control the evolution of inflorescences, the branching structures that bear flowers. We show that a single developmental model accounts for the restricted range of inflorescence types observed in nature and that this model is supported by molecular genetic studies. The model predicts associations between inflorescence architecture, climate, and life history, which we validated empirically. Paths, or evolutionary wormholes, link different architectures in a multidimensional fitness space, but the rate of evolution along these paths is constrained by genetic and environmental factors, which explains why some evolutionary transitions are rare between closely related plant taxa.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Prusinkiewicz, Przemyslaw -- Erasmus, Yvette -- Lane, Brendan -- Harder, Lawrence D -- Coen, Enrico -- New York, N.Y. -- Science. 2007 Jun 8;316(5830):1452-6. Epub 2007 May 24.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Computer Science, University of Calgary, 2500 University Drive N.W. Calgary, Alberta T2N 1N4, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17525303" target="_blank"〉PubMed〈/a〉
    Keywords: Arabidopsis/*anatomy & histology/genetics/*growth & development ; Arabidopsis Proteins/genetics/physiology ; *Biological Evolution ; Climate ; Computer Simulation ; Flowers/*anatomy & histology/genetics/*growth & development ; Gene Expression ; Genes, Plant ; Mathematics ; Meristem/growth & development ; *Models, Biological ; Selection, Genetic ; Transcription Factors/genetics/physiology
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    Entomology. The case of the empty hives (2007)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2007-05-19
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stokstad, Erik -- New York, N.Y. -- Science. 2007 May 18;316(5827):970-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17510336" target="_blank"〉PubMed〈/a〉
    Keywords: Agriculture ; Animal Nutritional Physiological Phenomena ; Animals ; Bacteria/isolation & purification ; *Bees/microbiology/parasitology/physiology ; Climate ; Diet ; Fungi/isolation & purification ; Mites ; Pesticides ; Population Dynamics ; United States ; United States Department of Agriculture ; Viruses/isolation & purification
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    Climate change. Global warming is changing the world (2007)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2007-04-14
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kerr, Richard A -- New York, N.Y. -- Science. 2007 Apr 13;316(5822):188-90.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17431148" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Climate ; Disasters ; *Greenhouse Effect ; Humans ; United Nations
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    Comment on "Carbon-negative biofuels from low-input high-diversity grassland biomass" (2007)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2007-06-16
    Description: Tilman et al. (Reports, 8 December 2006, p. 1598) argued that low-input high-diversity grasslands can provide a substantial proportion of global energy needs. We contend that their conclusions are not substantiated by their experimental protocol. The authors understated the management inputs required to establish prairies, extrapolated globally from site-specific results, and presented potentially misleading energy accounting.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Russelle, Michael P -- Morey, R Vance -- Baker, John M -- Porter, Paul M -- Jung, Hans-Joachim G -- New York, N.Y. -- Science. 2007 Jun 15;316(5831):1567; author reply 1567.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉U.S. Department of Agriculture, Agricultural Research Service, St. Paul, MN 55108, USA. michael.russelle@ars.usda.org〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17569846" target="_blank"〉PubMed〈/a〉
    Keywords: Agriculture ; *Biomass ; *Carbon/analysis ; Climate ; Ecosystem ; *Energy-Generating Resources ; Fabaceae/growth & development/metabolism ; Plant Development ; *Plants/metabolism ; *Poaceae/growth & development/metabolism ; Soil
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    A molecular basis for natural selection at the timeless locus in Drosophila melanogaster (2007)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2007-06-30
    Description: Diapause is a protective response to unfavorable environments that results in a suspension of insect development and is most often associated with the onset of winter. The ls-tim mutation in the Drosophila melanogaster clock gene timeless has spread in Europe over the past 10,000 years, possibly because it enhances diapause. We show that the mutant allele attenuates the photosensitivity of the circadian clock and causes decreased dimerization of the mutant TIMELESS protein isoform to CRYPTOCHROME, the circadian photoreceptor. This interaction results in a more stable TIMELESS product. These findings reveal a molecular link between diapause and circadian photoreception.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sandrelli, Federica -- Tauber, Eran -- Pegoraro, Mirko -- Mazzotta, Gabriella -- Cisotto, Paola -- Landskron, Johannes -- Stanewsky, Ralf -- Piccin, Alberto -- Rosato, Ezio -- Zordan, Mauro -- Costa, Rodolfo -- Kyriacou, Charalambos P -- New York, N.Y. -- Science. 2007 Jun 29;316(5833):1898-900.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, University of Padova, 35131 Padova, Italy.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17600216" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Animals ; *Circadian Rhythm/genetics ; Climate ; Cryptochromes ; Dimerization ; Drosophila Proteins/chemistry/*genetics/*metabolism ; Drosophila melanogaster/*genetics/metabolism/*physiology ; Europe ; Female ; Flavoproteins/*metabolism ; Light ; Motor Activity ; Mutation ; *Photoperiod ; Protein Isoforms/chemistry/genetics/metabolism ; Seasons ; *Selection, Genetic ; Temperature ; Transgenes ; Two-Hybrid System Techniques
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    The role of wheat awns in the seed dispersal unit (2007)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2007-05-15
    Description: The dispersal unit of wild wheat bears two pronounced awns that balance the unit as it falls. We discovered that the awns are also able to propel the seeds on and into the ground. The arrangement of cellulose fibrils causes bending of the awns with changes in humidity. Silicified hairs that cover the awns allow propulsion of the unit only in the direction of the seeds. This suggests that the dead tissue is analogous to a motor. Fueled by the daily humidity cycle, the awns induce the motility required for seed dispersal.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Elbaum, Rivka -- Zaltzman, Liron -- Burgert, Ingo -- Fratzl, Peter -- New York, N.Y. -- Science. 2007 May 11;316(5826):884-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Biomaterials Department, Max Planck Institute of Colloids and Interfaces, Golm, Germany. elbaum@mpikg.mpg.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17495170" target="_blank"〉PubMed〈/a〉
    Keywords: Cellulose/analysis ; Climate ; Humidity ; Lignin/analysis/chemistry/*ultrastructure ; Microscopy, Acoustic ; Microscopy, Electron, Scanning ; Plant Epidermis/physiology/ultrastructure ; Seeds/chemistry/*physiology/*ultrastructure ; Silicon Dioxide/analysis ; Soil ; Stress, Mechanical ; Triticum/*physiology/ultrastructure
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    Comment on "Why are there so many species of herbivorous insects in tropical rainforests?" (2007)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2007-03-24
    Description: Novotny et al. (Reports, 25 August 2006, p. 1115) argued that higher herbivore diversity in tropical forests results from greater phylogenetic diversity of host plants, not from higher host specificity. However, if host specificity is related to host abundance, differences in relative host abundance between tropical and temperate regions may limit any general conclusion that herbivore diversity scales directly with host-plant diversity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Norton, David A -- Didham, Raphael K -- New York, N.Y. -- Science. 2007 Mar 23;315(5819):1666; author reply 1666.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉School of Forestry, University of Canterbury, Private Bag 4800, Christchurch, New Zealand.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17379792" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biodiversity ; Climate ; *Insects ; Phylogeny ; Population Density ; *Trees ; *Tropical Climate
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    Nuclear war. Consequences of regional-scale nuclear conflicts (2007)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2007-03-03
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Toon, Owen B -- Robock, Alan -- Turco, Richard P -- Bardeen, Charles -- Oman, Luke -- Stenchikov, Georgiy L -- New York, N.Y. -- Science. 2007 Mar 2;315(5816):1224-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Atmospheric and Oceanic Sciences, Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO 80309, USA. toon@lasp.colorado.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17332396" target="_blank"〉PubMed〈/a〉
    Keywords: Agriculture ; Atmosphere ; Climate ; Humans ; International Cooperation ; Mortality ; *Nuclear Warfare/prevention & control/statistics & numerical data ; Smoke
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    Evolution. Dynamics of body size evolution (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-09-13
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Roy, Kaustuv -- New York, N.Y. -- Science. 2008 Sep 12;321(5895):1451-2. doi: 10.1126/science.1163097.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Section of Ecology, Behavior and Evolution, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA. kroy@ucsd.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18787156" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biological Evolution ; *Body Size ; Climate ; Ecosystem ; Extinction, Biological ; Greenhouse Effect ; Models, Biological ; Population Dynamics ; Stochastic Processes ; Temperature
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    Planetary science. Layers within layers hint at a wobbly Martian climate (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-05-20
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kerr, Richard A -- New York, N.Y. -- Science. 2008 May 16;320(5878):867. doi: 10.1126/science.320.5878.867.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18487168" target="_blank"〉PubMed〈/a〉
    Keywords: Climate ; Extraterrestrial Environment ; Geologic Sediments ; Ice ; *Mars
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    A dynamic marine calcium cycle during the past 28 million years (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-12-17
    Description: Multiple lines of evidence have shown that the isotopic composition and concentration of calcium in seawater have changed over the past 28 million years. A high-resolution, continuous seawater calcium isotope ratio curve from marine (pelagic) barite reveals distinct features in the evolution of the seawater calcium isotopic ratio suggesting changes in seawater calcium concentrations. The most pronounced increase in the delta44/40Ca value of seawater (of 0.3 per mil) occurred over roughly 4 million years following a period of low values around 13 million years ago. The major change in marine calcium corresponds to a climatic transition and global change in the carbon cycle and suggests a reorganization of the global biogeochemical system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Griffith, Elizabeth M -- Paytan, Adina -- Caldeira, Ken -- Bullen, Thomas D -- Thomas, Ellen -- New York, N.Y. -- Science. 2008 Dec 12;322(5908):1671-4. doi: 10.1126/science.1163614.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Geological and Environmental Sciences, Stanford University, Building 320, Room 118, Stanford, CA 94305, USA. egriffith@ucsc.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19074345" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Barium Sulfate/chemistry ; Calcium/*analysis/metabolism ; Calcium Carbonate/analysis ; Calcium Isotopes/analysis ; Climate ; Geologic Sediments/chemistry ; Seawater/*chemistry ; Time
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    Lunar and Planetary Science Conference. What was a 'wet and warm' early Mars really like? (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-03-29
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kerr, Richard A -- New York, N.Y. -- Science. 2008 Mar 28;319(5871):1757. doi: 10.1126/science.319.5871.1757b.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18369121" target="_blank"〉PubMed〈/a〉
    Keywords: Climate ; Extraterrestrial Environment ; *Mars ; Time ; *Water
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    A global map of human impact on marine ecosystems (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-02-16
    Description: The management and conservation of the world's oceans require synthesis of spatial data on the distribution and intensity of human activities and the overlap of their impacts on marine ecosystems. We developed an ecosystem-specific, multiscale spatial model to synthesize 17 global data sets of anthropogenic drivers of ecological change for 20 marine ecosystems. Our analysis indicates that no area is unaffected by human influence and that a large fraction (41%) is strongly affected by multiple drivers. However, large areas of relatively little human impact remain, particularly near the poles. The analytical process and resulting maps provide flexible tools for regional and global efforts to allocate conservation resources; to implement ecosystem-based management; and to inform marine spatial planning, education, and basic research.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Halpern, Benjamin S -- Walbridge, Shaun -- Selkoe, Kimberly A -- Kappel, Carrie V -- Micheli, Fiorenza -- D'Agrosa, Caterina -- Bruno, John F -- Casey, Kenneth S -- Ebert, Colin -- Fox, Helen E -- Fujita, Rod -- Heinemann, Dennis -- Lenihan, Hunter S -- Madin, Elizabeth M P -- Perry, Matthew T -- Selig, Elizabeth R -- Spalding, Mark -- Steneck, Robert -- Watson, Reg -- New York, N.Y. -- Science. 2008 Feb 15;319(5865):948-52. doi: 10.1126/science.1149345.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉National Center for Ecological Analysis and Synthesis, 735 State Street, Santa Barbara, CA 93101, USA. halpern@nceas.ucsb.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18276889" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Climate ; Conservation of Natural Resources ; *Ecosystem ; Fisheries ; *Human Activities ; Humans ; Mathematics ; Models, Theoretical ; Oceans and Seas
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    China's energy policy comes at a price (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-08-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wang, Qiang -- New York, N.Y. -- Science. 2008 Aug 29;321(5893):1156-7; author reply 1156-7. doi: 10.1126/science.321.5893.1156.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18755956" target="_blank"〉PubMed〈/a〉
    Keywords: China ; Climate ; Conservation of Energy Resources ; Energy-Generating Resources/*economics ; *Public Policy
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Oceans. On phytoplankton trends (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-03-08
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smetacek, Victor -- Cloern, James E -- New York, N.Y. -- Science. 2008 Mar 7;319(5868):1346-8. doi: 10.1126/science.1151330.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Alfred Wegener Institute for Polar and Marine Research of the Helmholtz Foundation, 27570 Bremerhaven, and the University of Bremen, FB 2, 28334 Bremen, Germany. Victor.Smetacek@awi.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18323440" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biomass ; Climate ; Diatoms/growth & development/physiology ; *Ecosystem ; Environment ; Food Chain ; Life Cycle Stages ; Oceans and Seas ; *Phytoplankton/growth & development/physiology ; Population Dynamics ; Seasons ; Temperature
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    John Beddington interview. U.K. science adviser makes his U.S. debut. Interview by Daniel Clery (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-09-27
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Beddington, John -- New York, N.Y. -- Science. 2008 Sep 26;321(5897):1756-7. doi: 10.1126/science.321.5897.1756a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18818330" target="_blank"〉PubMed〈/a〉
    Keywords: Climate ; Energy-Generating Resources ; Food Supply ; *Government ; Great Britain ; Public Policy ; *Science/education ; United States
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Virology. Coming out of Asia--year in, year out (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-04-19
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Enserink, Martin -- New York, N.Y. -- Science. 2008 Apr 18;320(5874):311. doi: 10.1126/science.320.5874.311.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18420912" target="_blank"〉PubMed〈/a〉
    Keywords: Asia/epidemiology ; Climate ; Genes, Viral ; Hemagglutinin Glycoproteins, Influenza Virus/genetics/immunology ; Humans ; *Influenza A Virus, H3N2 Subtype/immunology ; Influenza, Human/*epidemiology/transmission/virology ; Seasons
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Conservation with caveats (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-07-19
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Coetzee, Bernard W T -- New York, N.Y. -- Science. 2008 Jul 18;321(5887):340-2; author reply 340-2. doi: 10.1126/science.321.5887.340b.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18635778" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biodiversity ; Climate ; *Conservation of Natural Resources/economics ; Costs and Cost Analysis ; Madagascar
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Hopping hotspots: global shifts in marine biodiversity (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-08-02
    Description: Hotspots of high species diversity are a prominent feature of modern global biodiversity patterns. Fossil and molecular evidence is starting to reveal the history of these hotspots. There have been at least three marine biodiversity hotspots during the past 50 million years. They have moved across almost half the globe, with their timing and locations coinciding with major tectonic events. The birth and death of successive hotspots highlights the link between environmental change and biodiversity patterns. The antiquity of the taxa in the modern Indo-Australian Archipelago hotspot emphasizes the role of pre-Pleistocene events in shaping modern diversity patterns.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Renema, W -- Bellwood, D R -- Braga, J C -- Bromfield, K -- Hall, R -- Johnson, K G -- Lunt, P -- Meyer, C P -- McMonagle, L B -- Morley, R J -- O'Dea, A -- Todd, J A -- Wesselingh, F P -- Wilson, M E J -- Pandolfi, J M -- New York, N.Y. -- Science. 2008 Aug 1;321(5889):654-7. doi: 10.1126/science.1155674.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Nationaal Natuurhistorisch Museum, Naturalis, 2300 RA, Leiden, Netherlands. Renema@naturalis.nl〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18669854" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anthozoa/classification ; *Biodiversity ; Climate ; Ecosystem ; Fishes/classification ; *Fossils ; Geological Phenomena ; Geology ; *Marine Biology ; Mollusca/classification ; Phylogeny ; Rhizophoraceae/classification ; *Seawater ; Time
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 90
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    Unmasking the Indus. Indus collapse: the end or the beginning of an Asian culture? (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-06-07
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lawler, Andrew -- New York, N.Y. -- Science. 2008 Jun 6;320(5881):1281-3. doi: 10.1126/science.320.5881.1281.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18535222" target="_blank"〉PubMed〈/a〉
    Keywords: *Archaeology ; Asia ; Cities/history ; Civilization/*history ; Climate ; *Culture ; History, Ancient ; Humans ; India ; Pakistan
    Print ISSN: 0036-8075
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    Animal versus wind dispersal and the robustness of tree species to deforestation (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-06-07
    Description: Studies suggest that populations of different species do not decline equally after habitat loss. However, empirical tests have been confined to fine spatiotemporal scales and have rarely included plants. Using data from 89,365 forest survey plots covering peninsular Spain, we explored, for each of 34 common tree species, the relationship between probability of occurrence and the local cover of remaining forest. Twenty-four species showed a significant negative response to forest loss, so that decreased forest cover had a negative effect on tree diversity, but the responses of individual species were highly variable. Animal-dispersed species were less vulnerable to forest loss, with six showing positive responses to decreased forest cover. The results imply that plant-animal interactions help prevent the collapse of forest communities that suffer habitat destruction.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Montoya, Daniel -- Zavala, Miguel A -- Rodriguez, Miguel A -- Purves, Drew W -- New York, N.Y. -- Science. 2008 Jun 13;320(5882):1502-4. doi: 10.1126/science.1158404. Epub 2008 Jun 5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Departamento de Ecologia, Universidad de Alcala, 28871 Alcala de Henares, Madrid, Spain. daniel.montoya@alu.uah.es〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18535208" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biodiversity ; Climate ; *Conservation of Natural Resources ; *Ecosystem ; Environment ; Logistic Models ; Phylogeny ; *Seeds ; Soil ; Spain ; Species Specificity ; *Trees/classification/growth & development ; *Wind
    Print ISSN: 0036-8075
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    Transformation of the nitrogen cycle: recent trends, questions, and potential solutions (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-05-20
    Description: Humans continue to transform the global nitrogen cycle at a record pace, reflecting an increased combustion of fossil fuels, growing demand for nitrogen in agriculture and industry, and pervasive inefficiencies in its use. Much anthropogenic nitrogen is lost to air, water, and land to cause a cascade of environmental and human health problems. Simultaneously, food production in some parts of the world is nitrogen-deficient, highlighting inequities in the distribution of nitrogen-containing fertilizers. Optimizing the need for a key human resource while minimizing its negative consequences requires an integrated interdisciplinary approach and the development of strategies to decrease nitrogen-containing waste.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Galloway, James N -- Townsend, Alan R -- Erisman, Jan Willem -- Bekunda, Mateete -- Cai, Zucong -- Freney, John R -- Martinelli, Luiz A -- Seitzinger, Sybil P -- Sutton, Mark A -- New York, N.Y. -- Science. 2008 May 16;320(5878):889-92. doi: 10.1126/science.1136674.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Environmental Sciences Department, University of Virginia, Charlottesville, VA 22904, USA. jng@virginia.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18487183" target="_blank"〉PubMed〈/a〉
    Keywords: Agriculture/trends ; Animals ; Atmosphere ; Climate ; Commerce/trends ; Ecosystem ; *Environment ; Fossil Fuels ; Human Activities/trends ; Humans ; Industry/trends ; Interdisciplinary Communication ; *Nitrogen/analysis/metabolism ; Nitrogen Fixation ; *Reactive Nitrogen Species/analysis/chemistry/metabolism ; Tropical Climate
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    The future of forests (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-06-17
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sugden, Andrew -- Smith, Jesse -- Pennisi, Elizabeth -- New York, N.Y. -- Science. 2008 Jun 13;320(5882):1435. doi: 10.1126/science.320.5882.1435.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18556541" target="_blank"〉PubMed〈/a〉
    Keywords: Biodiversity ; Climate ; Conservation of Natural Resources ; *Ecosystem ; Forecasting ; Forestry ; *Trees
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    Polymorphic Y chromosomes harbor cryptic variation with manifold functional consequences (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-01-05
    Description: The paucity of polymorphisms in single-copy genes on the Y chromosome of Drosophila contrasts with data indicating that this chromosome has polymorphic phenotypic effects on sex ratio, temperature sensitivity, behavior, and fitness. We show that the Y chromosome of D. melanogaster harbors substantial genetic diversity in the form of polymorphisms for genetic elements that differentially affect the expression of hundreds of X-linked and autosomal genes. The affected genes are more highly expressed in males, more meagerly expressed in females, and more highly divergent between species. Functionally, they affect microtubule stability, lipid and mitochondrial metabolism, and the thermal sensitivity of spermatogenesis. Our findings provide a mechanism for adaptive phenotypic variation associated with the Y chromosome.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lemos, Bernardo -- Araripe, Luciana O -- Hartl, Daniel L -- GM065169/GM/NIGMS NIH HHS/ -- GM068465/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2008 Jan 4;319(5859):91-3. doi: 10.1126/science.1148861.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Organismic and Evolutionary Biology, Harvard University, 16 Divinity Avenue, Cambridge, MA 02138, USA. blemos@oeb.harvard.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18174442" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Evolution ; Climate ; DNA Transposable Elements ; Drosophila/*genetics/physiology ; Drosophila melanogaster/*genetics/physiology ; Epigenesis, Genetic ; Female ; *Gene Expression Regulation ; Genes, Insect ; Genetic Linkage ; Genetic Variation ; Heterochromatin/genetics ; Male ; *Polymorphism, Genetic ; Spermatogenesis ; Temperature ; Y Chromosome/*genetics
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    Basin-scale coherence in phenology of shrimps and phytoplankton in the North Atlantic Ocean (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-05-09
    Description: Climate change could lead to mismatches between the reproductive cycles of marine organisms and their planktonic food. We tested this hypothesis by comparing shrimp (Pandalus borealis) egg hatching times and satellite-derived phytoplankton bloom dynamics throughout the North Atlantic. At large spatial and long temporal (10 years or longer) scales, hatching was correlated with the timing of the spring phytoplankton bloom. Annual egg development and hatching times were determined locally by bottom water temperature. We conclude that different populations of P. borealis have adapted to local temperatures and bloom timing, matching egg hatching to food availability under average conditions. This strategy is vulnerable to interannual oceanographic variability and long-term climatic changes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Koeller, P -- Fuentes-Yaco, C -- Platt, T -- Sathyendranath, S -- Richards, A -- Ouellet, P -- Orr, D -- Skuladottir, U -- Wieland, K -- Savard, L -- Aschan, M -- New York, N.Y. -- Science. 2009 May 8;324(5928):791-3. doi: 10.1126/science.1170987.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Fisheries and Oceans, Bedford Institute of Oceanography, Post Office Box 1006, Dartmouth, B2Y 4A2 Nova Scotia, Canada. koellerp@mar.dfo-mpo.gc.ca〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19423827" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Atlantic Ocean ; Climate ; *Cold Temperature ; *Ecosystem ; Female ; Ovum/growth & development/physiology ; Pandalidae/*physiology ; Phytoplankton/*physiology ; Population Dynamics ; Reproduction ; Seasons ; *Seawater
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    The transition. Can an ecologist push NOAA up the food chain? (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-01-20
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stokstad, Erik -- New York, N.Y. -- Science. 2009 Jan 16;323(5912):321. doi: 10.1126/science.323.5912.321.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19150816" target="_blank"〉PubMed〈/a〉
    Keywords: Atmosphere ; Climate ; Ecology/history ; History, 20th Century ; History, 21st Century ; Oceans and Seas ; Politics ; *Public Policy ; United States ; United States Government Agencies/*organization & administration
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    History of science. Alexander von Humboldt and the general physics of the Earth (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-05-02
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jackson, Stephen T -- New York, N.Y. -- Science. 2009 May 1;324(5927):596-7. doi: 10.1126/science.1171659.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Botany Department and Program in Ecology, University of Wyoming, Laramie, WY 82071, USA. jackson@uwyo.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19407186" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biology/history ; Climate ; Ecology/history ; Geography/history ; Geology/history ; Germany ; History, 19th Century ; Natural Science Disciplines/*history
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    Drought sensitivity of the Amazon rainforest (2009)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2009-03-07
    Description: Amazon forests are a key but poorly understood component of the global carbon cycle. If, as anticipated, they dry this century, they might accelerate climate change through carbon losses and changed surface energy balances. We used records from multiple long-term monitoring plots across Amazonia to assess forest responses to the intense 2005 drought, a possible analog of future events. Affected forest lost biomass, reversing a large long-term carbon sink, with the greatest impacts observed where the dry season was unusually intense. Relative to pre-2005 conditions, forest subjected to a 100-millimeter increase in water deficit lost 5.3 megagrams of aboveground biomass of carbon per hectare. The drought had a total biomass carbon impact of 1.2 to 1.6 petagrams (1.2 x 10(15) to 1.6 x 10(15) grams). Amazon forests therefore appear vulnerable to increasing moisture stress, with the potential for large carbon losses to exert feedback on climate change.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Phillips, Oliver L -- Aragao, Luiz E O C -- Lewis, Simon L -- Fisher, Joshua B -- Lloyd, Jon -- Lopez-Gonzalez, Gabriela -- Malhi, Yadvinder -- Monteagudo, Abel -- Peacock, Julie -- Quesada, Carlos A -- van der Heijden, Geertje -- Almeida, Samuel -- Amaral, Ieda -- Arroyo, Luzmila -- Aymard, Gerardo -- Baker, Tim R -- Banki, Olaf -- Blanc, Lilian -- Bonal, Damien -- Brando, Paulo -- Chave, Jerome -- de Oliveira, Atila Cristina Alves -- Cardozo, Nallaret Davila -- Czimczik, Claudia I -- Feldpausch, Ted R -- Freitas, Maria Aparecida -- Gloor, Emanuel -- Higuchi, Niro -- Jimenez, Eliana -- Lloyd, Gareth -- Meir, Patrick -- Mendoza, Casimiro -- Morel, Alexandra -- Neill, David A -- Nepstad, Daniel -- Patino, Sandra -- Penuela, Maria Cristina -- Prieto, Adriana -- Ramirez, Fredy -- Schwarz, Michael -- Silva, Javier -- Silveira, Marcos -- Thomas, Anne Sota -- Steege, Hans Ter -- Stropp, Juliana -- Vasquez, Rodolfo -- Zelazowski, Przemyslaw -- Alvarez Davila, Esteban -- Andelman, Sandy -- Andrade, Ana -- Chao, Kuo-Jung -- Erwin, Terry -- Di Fiore, Anthony -- Honorio C, Euridice -- Keeling, Helen -- Killeen, Tim J -- Laurance, William F -- Pena Cruz, Antonio -- Pitman, Nigel C A -- Nunez Vargas, Percy -- Ramirez-Angulo, Hirma -- Rudas, Agustin -- Salamao, Rafael -- Silva, Natalino -- Terborgh, John -- Torres-Lezama, Armando -- New York, N.Y. -- Science. 2009 Mar 6;323(5919):1344-7. doi: 10.1126/science.1164033.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Ecology and Global Change, School of Geography, University of Leeds, Leeds LS2 9JT, UK. o.phillips@leeds.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19265020" target="_blank"〉PubMed〈/a〉
    Keywords: Atmosphere ; *Biomass ; Brazil ; Carbon ; Carbon Dioxide ; Climate ; *Droughts ; *Ecosystem ; South America ; *Trees/growth & development ; Tropical Climate
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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    The Red Queen and the Court Jester: species diversity and the role of biotic and abiotic factors through time (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-02-07
    Description: Evolution may be dominated by biotic factors, as in the Red Queen model, or abiotic factors, as in the Court Jester model, or a mixture of both. The two models appear to operate predominantly over different geographic and temporal scales: Competition, predation, and other biotic factors shape ecosystems locally and over short time spans, but extrinsic factors such as climate and oceanographic and tectonic events shape larger-scale patterns regionally and globally, and through thousands and millions of years. Paleobiological studies suggest that species diversity is driven largely by abiotic factors such as climate, landscape, or food supply, and comparative phylogenetic approaches offer new insights into clade dynamics.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Benton, Michael J -- New York, N.Y. -- Science. 2009 Feb 6;323(5915):728-32. doi: 10.1126/science.1157719.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Earth Sciences, University of Bristol, Bristol BS8 1RJ, UK. mike.benton@bristol.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19197051" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biodiversity ; *Biological Evolution ; Climate ; Fossils ; *Genetic Speciation ; Geography ; Geological Phenomena ; Logistic Models ; Models, Biological ; Phylogeny ; Time
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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    Fire in the Earth system (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-04-25
    Description: Fire is a worldwide phenomenon that appears in the geological record soon after the appearance of terrestrial plants. Fire influences global ecosystem patterns and processes, including vegetation distribution and structure, the carbon cycle, and climate. Although humans and fire have always coexisted, our capacity to manage fire remains imperfect and may become more difficult in the future as climate change alters fire regimes. This risk is difficult to assess, however, because fires are still poorly represented in global models. Here, we discuss some of the most important issues involved in developing a better understanding of the role of fire in the Earth system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bowman, David M J S -- Balch, Jennifer K -- Artaxo, Paulo -- Bond, William J -- Carlson, Jean M -- Cochrane, Mark A -- D'Antonio, Carla M -- Defries, Ruth S -- Doyle, John C -- Harrison, Sandy P -- Johnston, Fay H -- Keeley, Jon E -- Krawchuk, Meg A -- Kull, Christian A -- Marston, J Brad -- Moritz, Max A -- Prentice, I Colin -- Roos, Christopher I -- Scott, Andrew C -- Swetnam, Thomas W -- van der Werf, Guido R -- Pyne, Stephen J -- New York, N.Y. -- Science. 2009 Apr 24;324(5926):481-4. doi: 10.1126/science.1163886.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉University of Tasmania, Hobart, TAS 7001, Australia.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19390038" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Evolution ; Carbon ; Climate ; Earth (Planet) ; *Ecosystem ; *Fires ; Humans ; Plants
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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