气候变化领域集成服务门户(CCPortal): Interaction Between Mesoscale Eddies and the Gyre Circulation in the Lofoten Basin

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DOI	10.1029/2020JC016102
	Interaction Between Mesoscale Eddies and the Gyre Circulation in the Lofoten Basin
	Raj R.P.; Halo I.; Chatterjee S.; Belonenko T.; Bakhoday-Paskyabi M.; Bashmachnikov I.; Fedorov A.; Xie J.
发表日期	2020
ISSN	21699275
卷号	125 期号:7
英文摘要	The interaction between the mesoscale eddies and the cyclonic gyre circulation of the Lofoten Basin is studied using a suite of satellite altimeters, a regional coupled ocean-sea-ice data assimilation system (the TOPAZ reanalysis) and Argo float data. An automated method identified 5,373/5,589 individual anticyclonic/cyclonic eddies in the Lofoten Basin from more than 65,000 altimeter-based eddy observations, of which 70–85% are found to be nonlinear. The nonlinearity of eddies is estimated from its translational and rotational velocities. The study found clustering of highly intense nonlinear eddies on either side of the Lofoten Basin. Further, we show the distinct cyclonic drift of the anticyclonic and cyclonic eddies, both confined to the western side of the basin, and its similarity to the middepth gyre circulation also confined to the same region. A well-defined cyclonic drift pattern of eddies is found during the time period when the gyre circulation of the basin is strengthened, while a clear cyclonic drift of eddies is absent during a weakened gyre. Analysis of barotropic energy conversion in the reanalysis data shows maximum transfer of energy from the eddy field to the mean flow in the Lofoten Vortex region. Even though comparatively smaller (roughly 9 times) there is also notable transfer of energy from the mean flow to the eddies in the region located outside the Lofoten Vortex. Our study shows that the gyre circulation when strengthened, receives more energy from the Lofoten Vortex and loses less energy to those eddies circulating around the Lofoten Vortex. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	altimetry; Argo floats; gyre circulation; Lofoten basin; Lofoten vortex; mesoscale eddies
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186810
作者单位	Nansen Environmental and Remote Sensing Center, Bergen, Norway; Bjerknes Centre for Climate Research, Bergen, Norway; Conservation and Marine Sciences, Cape Peninsula University of Technology, Cape Town, South Africa; Centre for Sustainable Oceans, Cape Peninsula University of Technology, Cape Town, South Africa; Nansen-Tutu Center for Marine Environmental Research, University of Cape Town, Cape Town, South Africa; National Centre for Polar and Ocean Research, Ministry of Earth Sciences, Vasco da Gama, India; Department of Oceanography, Saint Petersburg State University, Saint Petersburg, Russian Federation; Geophysical Institute and Bergen Offshore Wind Centre, University of Bergen, Bergen, Norway; Nansen International Environmental and Remote Sensing Centre, Saint-Petersburg, Russian Federation
推荐引用方式 GB/T 7714	Raj R.P.,Halo I.,Chatterjee S.,et al. Interaction Between Mesoscale Eddies and the Gyre Circulation in the Lofoten Basin[J],2020,125(7).
APA	Raj R.P..,Halo I..,Chatterjee S..,Belonenko T..,Bakhoday-Paskyabi M..,...&Xie J..(2020).Interaction Between Mesoscale Eddies and the Gyre Circulation in the Lofoten Basin.Journal of Geophysical Research: Oceans,125(7).
MLA	Raj R.P.,et al."Interaction Between Mesoscale Eddies and the Gyre Circulation in the Lofoten Basin".Journal of Geophysical Research: Oceans 125.7(2020).