期刊
GEOPHYSICAL RESEARCH LETTERS
卷 42, 期 15, 页码 6424-6431出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2015GL064694
关键词
coastal upwelling; climate change; ocean biogeochemistry; ecosystem oceanography; deoxygenation; acidification
资金
- NSF [1434530, 1434732]
- NOAA's Environmental Research Division
- U.S. Department of Energy's PCMDI
- Division Of Ocean Sciences
- Directorate For Geosciences [1434530, 1026607] Funding Source: National Science Foundation
- Division Of Ocean Sciences
- Directorate For Geosciences [1434732] Funding Source: National Science Foundation
Upwelling is critical to the biological production, acidification, and deoxygenation of the ocean's major eastern boundary current ecosystems. A leading conceptual hypothesis projects that the winds that induce coastal upwelling will intensify in response to increased land-sea temperature differences associated with anthropogenic global warming. We examine this hypothesis using an ensemble of coupled, ocean-atmosphere models and find limited evidence for intensification of upwelling-favorable winds or atmospheric pressure gradients in response to increasing land-sea temperature differences. However, our analyses reveal consistent latitudinal and seasonal dependencies of projected changes in wind intensity associated with poleward migration of major atmospheric high-pressure cells. Summertime winds near poleward boundaries of climatological upwelling zones are projected to intensify, while winds near equatorward boundaries are projected to weaken. Developing a better understanding of future changes in upwelling winds is essential to identifying portions of the oceans susceptible to increased hypoxia, ocean acidification, and eutrophication under climate change.
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