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  • American Association for the Advancement of Science (AAAS)  (22,181)
  • 1995-1999  (8,861)
  • 1990-1994  (13,320)
Collection
Keywords
Publisher
Years
Year
  • 1
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    Is Warming Trend Harming Penguins? (1997)
    American Association for the Advancement of Science (AAAS)
    In:  Science, 276 (5320). p. 1790.
    Details
    Publication Date: 2021-04-15
    Type: Article , PeerReviewed
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  • 2
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    Decadal Trends in the North Atlantic Oscillation: Regional Temperatures and Precipitation (1995)
    American Association for the Advancement of Science (AAAS)
    In:  Science, 269 (5224). pp. 676-679.
    Details
    Publication Date: 2019-05-10
    Description: Greenland ice-core data have revealed large decadal climate variations over the North Atlantic that can be related to a major source of low-frequency variability, the North Atlantic Oscillation. Over the past decade, the Oscillation has remained in one extreme phase during the winters, contributing significantly to the recent wintertime warmth across Europe and to cold conditions in the northwest Atlantic. An evaluation of the atmospheric moisture budget reveals coherent large-scale changes since 1980 that are linked to recent dry conditions over southern Europe and the Mediterranean, whereas northern Europe and parts of Scandinavia have generally experienced wetter than normal conditions.
    Type: Article , PeerReviewed
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  • 3
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    Geochemical Consequences of Increased Atmospheric Carbon Dioxide on Coral Reefs (1999)
    American Association for the Advancement of Science (AAAS)
    In:  Science, 284 (5411). pp. 118-120.
    Details
    Publication Date: 2019-05-10
    Description: A coral reef represents the net accumulation of calcium carbonate (CaCO3) produced by corals and other calcifying organisms. If calcification declines, then reef-building capacity also declines. Coral reef calcification depends on the saturation state of the carbonate mineral aragonite of surface waters. By the middle of the next century, an increased concentration of carbon dioxide will decrease the aragonite saturation state in the tropics by 30 percent and biogenic aragonite precipitation by 14 to 30 percent. Coral reefs are particularly threatened, because reef-building organisms secrete metastable forms of CaCO3, but the biogeochemical consequences on other calcifying marine ecosystems may be equally severe.
    Type: Article , PeerReviewed
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  • 4
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    Sea-Surface Temperature from Coral Skeletal Strontium/Calcium Ratios (1992)
    American Association for the Advancement of Science (AAAS)
    In:  Science, 257 (5070). pp. 644-647.
    Details
    Publication Date: 2019-03-13
    Description: Seasonal records of tropical sea-surface temperature (SST) over the past 10(5) years can be recovered from high-precision measurements of coral strontium/calcium ratios with the use of thermal ionization mass spectrometry. The temperature dependence of these ratios was calibrated with corals collected at SST recording stations and by (18)O/(16)O thermometry. The results suggest that mean monthly SST may be determined with an apparent accuracy of better than 0.5 degrees C. Measurements on a fossil coral indicate that 10,200 years ago mean annual SSTs near Vanuatu in the southwestern Pacific Ocean were about 5 degrees C colder than today and that seasonal variations in SST were larger. These data suggest that tropical climate zones were compressed toward the equator during deglaciation.
    Type: Article , PeerReviewed
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  • 5
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    Cephalopodologie (1990)
    American Association for the Advancement of Science (AAAS)
    In:  Science, 248 . pp. 898-899.
    Details
    Publication Date: 2017-02-15
    Type: Article , PeerReviewed
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  • 6
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    Global Climate Change and Intensification of Coastal Ocean Upwelling (1990)
    American Association for the Advancement of Science (AAAS)
    In:  Science, 247 (4939). pp. 198-201.
    Details
    Publication Date: 2017-01-04
    Description: A mechanism exists whereby global greenhouse warning could, by intensifying the alongshore wind stress on the ocean surface, lead to acceleration of coastal upwelling. Evidence from several different regions suggests that the major coastal upwelling systems of the world have been growing in upwelling intensity as greenhouse gases have accumulated in the earth's atmosphere. Thus the cool foggy summer conditions that typify the coastlands of northern California and other similar upwelling regions might, under global warming, become even more pronounced. Effects of enhanced upwelling on the marine ecosystem are uncertain but potentially dramatic.
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  • 7
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    Causes of Decadal Climate Variability over the North Pacific and North America (1994)
    American Association for the Advancement of Science (AAAS)
    In:  Science, 266 (5185). pp. 634-637.
    Details
    Publication Date: 2016-09-09
    Description: The cause of decadal climate variability over the North Pacific Ocean and North America is investigated by the analysis of data from a multidecadal integration with a state-of-the-art coupled ocean-atmosphere model and observations. About one-third of the low-frequency climate variability in the region of interest can be attributed to a cycle involving unstable air-sea interactions between the subtropical gyre circulation in the North Pacific and the Aleutian low-pressure system. The existence of this cycle provides a basis for long-range climate forecasting over the western United States at decadal time scales.
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  • 8
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    A Two-Tiered Approach to Long-Range Climate Forecasting (1993)
    American Association for the Advancement of Science (AAAS)
    In:  Science, 261 (5124). pp. 1026-1029.
    Details
    Publication Date: 2016-09-09
    Description: Long-range global climate forecasts were made by use of a model for predicting a tropical Pacific sea-surface temperature (SST) in tandem with an atmospheric general circulation model. The SST is predicted first at long lead times into the future. These ocean forecasts are then used to force the atmospheric model and so produce climate forecasts at lead times of the SST forecasts. Prediction of seven large climatic events of the 1970s to 1990s by this technique are in good agreement with observations over many regions of the globe.
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  • 9
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    Glacial Climate in the Tropics (1996)
    American Association for the Advancement of Science (AAAS)
    In:  Science, 272 (5270). pp. 1902-1904.
    Details
    Publication Date: 2016-06-16
    Description: During glacial cycles, different parts of the Earth cool by different amounts. A growing collection of evidence has begun to show that cooling in the tropical oceans was greater than previously thought. In his Perspective, Broecker discusses the oxygen isotope evidence reported by Schrag et al. (p. 1930) that indicates that the cooling in deep tropical water was close to the freezing point.
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  • 10
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    A Possible 20th-Century Slowdown of Southern Ocean Deep Water Formation (1999)
    American Association for the Advancement of Science (AAAS)
    In:  Science, 286 (5442). pp. 1132-1135.
    Details
    Publication Date: 2016-06-10
    Description: Chlorofluorocarbon-11 inventories for the deep Southern Ocean appear to confirm physical oceanographic and geochemical studies in the Southern Ocean, which suggest that no more than 5 × 106 cubic meters per second of ventilated deep water is currently being produced. This result conflicts with conclusions based on the distributions of the carbon-14/carbon ratio and a quasi-conservative property, PO4 *, in the deep sea, which seem to require an average of about 15 × 106cubic meters per second of Southern Ocean deep ventilation over about the past 800 years. A major reduction in Southern Ocean deep water production during the 20th century (from high rates during the Little Ice Age) may explain this apparent discordance. If this is true, a seesawing of deep water production between the northern Atlantic and Southern oceans may lie at the heart of the 1500-year ice-rafting cycle.
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