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| DOI | 10.1126/science.1072376 |
| El Niño-like pattern in ice age tropical Pacific sea surface temperature | |
| Koutavas A.; Lynch-Stieglitz J.; Marchitto Jr. T.M.; Sachs J.P. | |
| 发表日期 | 2002 |
| ISSN | 0036-8075 |
| 起始页码 | 226 |
| 结束页码 | 230 |
| 卷号 | 297期号:5579 |
| 英文摘要 | Sea surface temperatures (SSTs) in the cold tongue of the eastern equatorial Pacific exert powerful controls on global atmospheric circulation patterns. We examined climate variability in this region from the Last Glacial Maximum (LGM) to the present, using a SST record reconstructed from magnesium/calcium ratios in foraminifera from sea-floor sediments near the Galápagos Islands. Cold-tongue SST varied coherently with precession- induced changes in seasonality during the past 30,000 years. Observed LGM cooling of just 1.2°C implies a relaxation of tropical temperature gradients, weakened Hadley and Walker circulation, southward shift of the Intertropical Convergence Zone, and a persistent El Niño-like pattern in the tropical Pacific. This is contrasted with mid-Holocene cooling suggestive of a La Niña-like pattern with enhanced SST gradients and strengthened trade winds. Our results support a potent role for altered tropical Pacific SST gradients in global climate variations. |
| 英文关键词 | Calcium; Magnesium printing plates; Sediments; Wind; Climate variability; Ice; calcium; ice; magnesium; atmosphere-ocean system; atmospheric circulation; El Nino; Holocene; paleoclimate; sea surface temperature; article; Ecuador; El Nino; environmental temperature; foraminifer; global climate; Pacific Ocean; priority journal; sea surface temperature; tropics; Pacific Ocean; Foraminifera |
| 语种 | 英语 |
| 来源期刊 | Science
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/244397 |
| 作者单位 | Lamont-Doherty Earth Observatory, Department of Environmental Sciences, Columbia University, Palisades, NY 10964, United States |
| 推荐引用方式 GB/T 7714 | Koutavas A.,Lynch-Stieglitz J.,Marchitto Jr. T.M.,et al. El Niño-like pattern in ice age tropical Pacific sea surface temperature[J],2002,297(5579). |
| APA | Koutavas A.,Lynch-Stieglitz J.,Marchitto Jr. T.M.,&Sachs J.P..(2002).El Niño-like pattern in ice age tropical Pacific sea surface temperature.Science,297(5579). |
| MLA | Koutavas A.,et al."El Niño-like pattern in ice age tropical Pacific sea surface temperature".Science 297.5579(2002). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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