埃克曼重访:北半球风左侧的表层洋流

IF 11.7 1区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES Science Advances Pub Date : 2024-11-13 DOI:10.1126/sciadv.adr0282
Michael J. McPhaden, K. Athulya, M. S. Girishkumar, Mirko Orlić
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引用次数: 0

摘要

埃克曼关于自转行星上风驱动洋流的理论,对于我们理解为什么北半球的洋流会随风向右偏转,而南半球的洋流会随风向左偏转至关重要。该理论允许在短于当地惯性周期的周期内,海流向相反方向偏转,但埃克曼并没有提到这些海流,人们也很少观测到它们。在这里,我们利用长期深水海面系泊浮标的多年数据,描述了孟加拉湾海面流在顺时针旋转陆风风力作用下向左偏转的一个突出例子。我们将进一步完善埃克曼理论,使其更好地与我们自己和以前的测量结果相协调,最后讨论这项工作对理解风力作用海洋环流的广泛影响。
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Ekman revisited: Surface currents to the left of the winds in the Northern Hemisphere
Ekman’s theory of wind-driven ocean currents on a rotating planet is central to our understanding of why surface currents are deflected to the right of the winds in the Northern Hemisphere and to the left of the winds in the Southern Hemisphere. The theory admits solutions for currents deflected in the opposite direction at periods shorter than the local inertial period, but Ekman did not mention these currents, and they have only rarely been observed. Here, we describe a prominent example of surface flow in the Bay of Bengal directed to the left of clockwise-rotating land breeze wind forcing using multiple years of data from a long-term deepwater surface moored buoy. We further refine Ekman’s theory so as to better reconcile it with our own and previous measurements and then conclude by discussing the broad implications of this work for understanding wind-forced ocean circulation.
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来源期刊
Science Advances
Science Advances 综合性期刊-综合性期刊
CiteScore
21.40
自引率
1.50%
发文量
1937
审稿时长
29 weeks
期刊介绍: Science Advances, an open-access journal by AAAS, publishes impactful research in diverse scientific areas. It aims for fair, fast, and expert peer review, providing freely accessible research to readers. Led by distinguished scientists, the journal supports AAAS's mission by extending Science magazine's capacity to identify and promote significant advances. Evolving digital publishing technologies play a crucial role in advancing AAAS's global mission for science communication and benefitting humankind.
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