Observations of Seasonal Upwelling and Downwelling in the Beaufort Sea Mediated by Sea Ice
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In this paper, the authors presented observational estimates of Ekman pumping in the Beaufort Gyre region Averaged over the Canada Basin, the results show a 2003-14 average of 23m yr−1 downward with strong seasonal and interannual variability superimposed: monthly and yearly means range from 30 m yr− 1 downward to 10 m yr −1 upward.Abstract:
We present observational estimates of Ekman pumping in the Beaufort Gyre region Averaged over the Canada Basin, the results show a 2003–14 average of 23 m yr−1 downward with strong seasonal and interannual variability superimposed: monthly and yearly means range from 30 m yr−1 downward to 10 m yr−1 upward A clear, seasonal cycle is evident with intense downwelling in autumn and upwelling during the winter months, despite the wind forcing being downwelling favorable year-round Wintertime upwelling is associated with friction between the large-scale Beaufort Gyre ocean circulation and the surface ice pack and contrasts with previous estimates of yearlong downwelling; as a consequence, the yearly cumulative Ekman pumping over the gyre is significantly reduced The spatial distribution of Ekman pumping is also modified, with the Beaufort Gyre region showing alternating, moderate upwelling and downwelling, while a more intense, yearlong downwelling averaging 18 m yr−1 is identified in the northern read more
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Gianluca Meneghello,John Marshall,Jean-Michel Campin,Edward W. Doddridge,Mary-Louise Timmermans +4 more
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