Rapid 20th-Century Increase in Coastal Upwelling off Northwest Africa
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...
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| Veröffentlicht in: | Science (American Association for the Advancement of Science) 2007-02, Vol.315 (5812), p.637-639 |
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| creator | McGregor, H.V Dima, M Fischer, H.W Mulitza, S |
| description | 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 CO₂ levels increase. |
| doi_str_mv | 10.1126/science.1134839 |
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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. 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| ispartof | Science (American Association for the Advancement of Science), 2007-02, Vol.315 (5812), p.637-639 |
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| source | American Association for the Advancement of Science; Jstor Complete Legacy |
| subjects | Atmospherics Carbon dioxide Coasts Cooling Datasets Earth sciences Earth, ocean, space Exact sciences and technology Geophysics Global warming Marine Marine and continental quaternary Marine geology Oceanography Oceans Proxy reporting Proxy statements Sea water Surface water Surficial geology Upwelling water Water temperature |
| title | Rapid 20th-Century Increase in Coastal Upwelling off Northwest Africa |
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