Climate Impact of Late Quaternary Equatorial Pacific Sea Surface Temperature Variations

DOI Web Site 被引用文献24件
  • David W. Lea
    Department of Geological Sciences and Marine Science Institute, University of California, Santa Barbara, CA 93106, USA.
  • Dorothy K. Pak
    Department of Geological Sciences and Marine Science Institute, University of California, Santa Barbara, CA 93106, USA.
  • Howard J. Spero
    Department of Geology, University of California, Davis, CA 95616, USA.

書誌事項

公開日
2000-09-08
DOI
  • 10.1126/science.289.5485.1719
公開者
American Association for the Advancement of Science (AAAS)

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説明

<jats:p>Magnesium/calcium data from planktonic foraminifera in equatorial Pacific sediment cores demonstrate that tropical Pacific sea surface temperatures (SSTs) were 2.8° ± 0.7°C colder than the present at the last glacial maximum. Glacial-interglacial temperature differences as great as 5°C are observed over the last 450 thousand years. Changes in SST coincide with changes in Antarctic air temperature and precede changes in continental ice volume by about 3 thousand years, suggesting that tropical cooling played a major role in driving ice-age climate. Comparison of SST estimates from eastern and western sites indicates that the equatorial Pacific zonal SST gradient was similar or somewhat larger during glacial episodes. Extraction of a salinity proxy from the magnesium/calcium and oxygen isotope data indicates that transport of water vapor into the western Pacific was enhanced during glacial episodes.</jats:p>

収録刊行物

  • Science

    Science 289 (5485), 1719-1724, 2000-09-08

    American Association for the Advancement of Science (AAAS)

被引用文献 (24)*注記

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