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  • 2010-2014  (212)
  • 1995-1999  (82)
  • 1975-1979  (31)
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  • 1
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    (Table 1) Snow accumulation in the McMurdo Dry Valleys (2010)
    PANGAEA
    In:  Supplement to: Fountain, Andrew G; Nylen, Thomas H; Monaghan, Andrew J; Basagic, Hassan J; Bromwich, David H (2010): Snow in the McMurdo Dry Valleys, Antarctica. International Journal of Climatology, 30(5), 633-642, https://doi.org/10.1002/joc.1933
    Details
    Publication Date: 2023-12-13
    Description: Snowfall was measured at 11 sites in the McMurdo Dry Valleys to determine its magnitude, its temporal changes, and spatial patterns. Annual values ranged from 3 to 50 mm water equivalent with the highest values nearest the coast and decreasing inland. A particularly strong spatial gradient exists in Taylor Valley, probably resulting from local uplift conditions at the coastal margin and valley topography that limits migration inland. More snow occurs in winter near the coast, whereas inland no seasonal pattern is discernable. This may be due, again, to local uplift conditions, which are common in winter. We find no influence of the distance to the sea ice edge. Katabatic winds play an important role in transporting snow to the valley bottoms and essentially double the precipitation. That much of the snow accumulation sublimates prior to making a hydrologic contribution underscores the notion that the McMurdo Dry Valleys are indeed an extreme polar desert.
    Keywords: Accumulation of snow in water equivalent per year; Canada_Gl; Commonw_Gl; DATE/TIME; Device type; Event label; Explorers_Cove2; Howard_Gl; International Polar Year (2007-2008); IPY; Lake_Bonney; Lake_Brownworth2; Lake_Fryxell2; Lake_Hoare2; Lake_Vanda2; Lake_Vida; Latitude of event; Longitude of event; Taylor_Gl; Taylor Valley, East Antarctica; Unmanned weather station/meteorological observation; UWST; Victoria Valley, East Antarctica; Wright Valley, East Antarctica
    Type: Dataset
    Format: text/tab-separated-values, 144 data points
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    DATA PANGAEA
  • 2
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    (Table 2) Foehn characteristics of station in the McMurdo Dry Valleys, Antarctica (2010)
    PANGAEA
    In:  Supplement to: Speirs, Johanna C; Steinhoff, Daniel F; McGowan, Hamish A; Bromwich, David H; Monaghan, Andrew J (2010): Foehn Winds in the McMurdo Dry Valleys, Antarctica: The Origin of Extreme Warming Events. Journal of Climate, 23(13), 3577-3598, https://doi.org/10.1175/2010JCLI3382.1
    Details
    Publication Date: 2023-12-13
    Description: Foehn winds resulting from topographic modification of airflow in the lee of mountain barriers are frequently experienced in the McMurdo Dry Valleys (MDVs) of Antarctica. Strong foehn winds in the MDVs cause dramatic warming at onset and have significant effects on landscape forming processes; however, no detailed scientific investigation of foehn in the MDVs has been conducted. As a result, they are often misinterpreted as adiabatically warmed katabatic winds draining from the polar plateau. Herein observations from surface weather stations and numerical model output from the Antarctic Mesoscale Prediction System (AMPS) during foehn events in the MDVs are presented. Results show that foehn winds in the MDVs are caused by topographic modification of south-southwesterly airflow, which is channeled into the valleys from higher levels. Modeling of a winter foehn event identifies mountain wave activity similar to that associated with midlatitude foehn winds. These events are found to be caused by strong pressure gradients over the mountain ranges of the MDVs related to synoptic-scale cyclones positioned off the coast of Marie Byrd Land. Analysis of meteorological records for 2006 and 2007 finds an increase of 10% in the frequency of foehn events in 2007 compared to 2006, which corresponds to stronger pressure gradients in the Ross Sea region. It is postulated that the intra- and interannual frequency and intensity of foehn events in the MDVs may therefore vary in response to the position and frequency of cyclones in the Ross Sea region.
    Keywords: Beacon_Valley2; Canada_Gl; Comment; Commonw_Gl; DATE/TIME; Date/time end; Event label; Explorers_Cove2; Howard_Gl; Humidity, relative, minimum; International Polar Year (2007-2008); IPY; Lake_Bonney; Lake_Fryxell2; Lake_Hoare2; Lake_Vanda2; Lake_Vida; McMurdo Dry Valleys, southern Victorica Land, Antarctica; Station label; Taylor_Gl; Taylor Valley, East Antarctica; Temperature, air, maximum; Temperature, air, minimum; Unmanned weather station/meteorological observation; UWST; Victoria Valley, East Antarctica; Wind direction; Wind speed, gust; Wright Valley, East Antarctica
    Type: Dataset
    Format: text/tab-separated-values, 82 data points
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    DATA PANGAEA
  • 3
    Electronic Resource
    Electronic Resource
    Moessbauer spectra of penta- and hexacyanoferrate(II) compounds in solid and frozen solution states (1978)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 82 (1978), S. 1045-1051 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100498a018
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    THE NEW CENTRALISM: LOCAL GOVERNMENT FINANCE IN THE 1990s (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Financial accountability and management 11 (1995), S. 0 
    Details
    ISSN: 1468-0408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: Since the mid- 1970s, the problem of accountability in local government finance has been referred to consistently in government and has produced a range of responses from the centre. In the 199Os, the problems of implementing the poll tax resulted in its replacement with a modified property tax, supplemented by tight expenditure controls - in Layfield's terms, a ‘centralist’ solution. The centre now provides 85% of local income and controls the upper limits of local spending, leaving only a minor degree of fiscal discretion with local authorities. The new tax arrangements have proved acceptable, as has the grant system, but political conflict remains over the acceptability of capping controls.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1468-0408.1995.tb00401.x
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  • 5
    Electronic Resource
    Electronic Resource
    Sulphur accumulation and redistribution in wheat (Triticum aestivum): a study using stable sulphur isotope ratios as a tracer system (1999)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 22 (1999), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Wheat plants were grown hydroponically and fed with two sulphate sources differing in stable isotope composition, one having a δ34S of 13·7‰ and the other 4·1‰. Plant sulphur (S) isotope ratios were determined using an on-line continuous flow-isotope ratio mass spectrometer. This method greatly simplified the procedure for the measurement of S isotope ratios, and was found to be precise for samples containing 〉 1 mg S g–1 dry weight. The δ34S values of plant shoots, which had been grown on a single sulphate source, were very close to the source values, suggesting little isotope fractionation during sulphate uptake and transport from roots to shoots. By changing the sulphate sources at different growth stages, it was possible to estimate S accumulation and redistribution within different plant parts. At maturity, wheat grain derived 14, 30, 6 and 50% of its S from the accumulation during the following successive growth stages: between emergence and early stem extension, between stem extension and flag leaf emergence, between flag leaf emergence and anthesis, and after anthesis, respectively. It was estimated that 39, 32 and 52% of the S present in the flag leaves, older leaves and stems, respectively, at anthesis, was exported during the postanthesis period. These results demonstrate considerable cycling of S within wheat plants, and highlight the importance of S uptake after anthesis to the accumulation of S in grain under the experimental conditions employed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-3040.1999.00445.x
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  • 6
    Electronic Resource
    Electronic Resource
    The biology of Johnson grass (Sorghum halepense) (1979)
    Oxford, UK : Blackwell Publishing Ltd
    Weed research 19 (1979), S. 0 
    Details
    ISSN: 1365-3180
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The literature on various aspects of the biology of Johnson grass. Sorghum halepense (L.) Pers. is reviewed. Topics discussed include its distribution, cytology, taxonomy, life cycle, variability and the dormancy and germination of its seeds and rhizomes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3180.1979.tb01536.x
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  • 7
    Electronic Resource
    Electronic Resource
    Seasonal trends of gross N mineralization in a natural calcareous grassland (1999)
    Oxford, UK : Blackwell Science Ltd
    Global change biology 5 (1999), S. 0 
    Details
    ISSN: 1365-2486
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering , Geography
    Notes: The effect of climate change on biologically mediated soil processes is likely to be complex and difficult to predict. The direct effect of changes in soil moisture and temperature may be obscured or even reversed by changes in the return of organic substrates to the soil. This paper is the first in a series reporting the results from a medium-term investigation into the effect of simulated climate change on soil N mineralization in a seminatural calcareous grassland in southern England. Gross rates of N mineralization were determined by isotope dilution in plots subjected to winter warming (3 °C above ambient), enhanced or decreased summer rainfall and combinations of these treatments. The results from the control treatment, reported here, show a strong seasonality of gross N mineralization with rates highest in the Spring and Autumn and lowest in Summer. They indicate that water availability is the main restraint on microbial processes and plant growth and that, in the short term, enhanced summer rainfall is likely to be the main factor influencing nutrient turnover. Further papers will report the results from the imposed treatments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2486.1999.00232.x
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  • 8
    Electronic Resource
    Electronic Resource
    Light-induced formation of dense-core vesicles in rod photoreceptors in retina of Xenopus laevis (1975)
    [s.l.] : Nature Publishing Group
    Nature 257 (1975), S. 586-587 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The upshot of this previous work is that there are no unequivocal descriptions of changes in vesicle structure which can be correlated with changes in illumination. We were therefore intrigued to find changes in the morphology of vesicles in the synaptic region of rods in the retina of Xenopus, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/257586a0
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  • 9
    Electronic Resource
    Electronic Resource
    Dickkopf-1 is a member of a new family of secreted proteins and functions in head induction (1998)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 391 (1998), S. 357-362 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The Spemann organizer in amphibian embryos is a tissue with potent head-inducing activity, the molecular nature of which is unresolved. Here we describe dickkopf-1 (dkk-1), which encodes Dkk-1, a secreted inducer of Spemann's organizer in Xenopus and a member of a new protein family. Injections of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/34848
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  • 10
    Electronic Resource
    Electronic Resource
    Does practice shape the brain? (1998)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 394 (1998), S. 434-434 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Pantev et al. (Nature 392, 811–814; 1998) suggest that the degree of cortical reorganization and enhancement of the cortical response to musical notes depends on the age at which musicians first begin learning to play an instrument. ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/28775
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