Rapid 20th-century increase in coastal upwelling off northwest Africa

被引：218

作者：

McGregor, H. V.

Dima, M.

Fischer, H. W.

Mulitza, S.

机构：

[1] Univ Bremen, DFG Res Ctr Ocean Margins, D-28359 Bremen, Germany

[2] Alfred Wegener Inst Polar & Marine Res, D-27570 Bremerhaven, Germany

[3] Univ Bucharest, Fac Phys, Bucharest 077125, Romania

[4] Univ Bremen, Inst Environm Phys, D-28350 Bremen, Germany

[5] Univ Bremen, MARUM Ctr Marine Environm Sci, D-28359 Bremen, Germany

来源：

SCIENCE | 2007年 / 315卷 / 5812期

关键词：

D O I：

10.1126/science.1134839

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Near-shore waters along the northwest African margin are characterized by coastal upwelling and represent one of the world's major upwelling regions. Sea surface temperature (SST) records from Moroccan sediment cores, extending back 2500 years, reveal anomalous and unprecedented cooling during the 20th century, which is consistent with increased upwelling. Upwelling-driven SSTs also vary out of phase with millennial-scale changes in Northern Hemisphere temperature anomalies (NHTAs) and show relatively warm conditions during the Little Ice Age and relatively cool conditions during the Medieval Warm Period. Together, these results suggest that coastal upwelling varies with NHTAs and that upwelling off northwest Africa may continue to intensify as global warming and atmospheric CO(2) levels increase.

引用

页码：637 / 639

页数：3

共 27 条

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