期刊
GEOPHYSICAL RESEARCH LETTERS
卷 40, 期 22, 页码 5915-5919出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2013GL058013
关键词
sea level; Gulf Stream; AMOC; continental shelf; wind stress; altimetry
资金
- NSF [OCE-1129125]
- Woods Hole Oceanographic Institution's Coastal Ocean Institute
- Directorate For Geosciences
- Division Of Ocean Sciences [0926999] Funding Source: National Science Foundation
- Division Of Ocean Sciences
- Directorate For Geosciences [1129125, 0726720] Funding Source: National Science Foundation
Annually averaged sea level (1970-2012) measured by tide gauges along the North American east coast is remarkably coherent over a 1700km swath from Nova Scotia to North Carolina. Satellite altimetry (1993-2011) shows that this coherent interannual variability extends over the Middle Atlantic Bight, Gulf of Maine, and Scotian Shelf to the shelf break where there is a local minimum in sea level variance. Comparison with National Center for Environmental Prediction reanalysis winds suggests that a significant fraction of the detrended sea level variance is forced by the region's along-shelf wind stress. While interannual changes in sea level appear to be forced locally, altimetry suggests that the changes observed along the coast and over the shelf may influence the Gulf Stream path downstream of Cape Hatteras.
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