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The 3‐D Structure of Mesoscale Eddies in the Lofoten Basin of the Norwegian Sea: A Composite Analysis From Altimetry and In Situ Data
Journal of Geophysical Research: Oceans ( IF 3.6 ) Pub Date : 2020-09-09 , DOI: 10.1029/2020jc016331
Nikita V. Sandalyuk 1 , Anthony Bosse 2, 3 , Tatyana V. Belonenko 1
Affiliation  

In this research temperature and salinity profiles in eddy‐centered coordinates obtained from satellite altimetry (eddy data set distributed by Archiving, Validation and Interpretation of Satellite Oceanographic data) are combined to document the mean three‐dimensional structures of cyclonic (CEs) and anticyclonic (AEs) eddies in the Lofoten Basin. For eddies of both polarities, significant eddy‐induced anomalies are concentrated within the zero vorticity radius and vertically to the depth of ∼900–1,000 m. The thermohaline vertical structures of CEs and AEs differ in terms of salinity and temperature anomalies. Horizontal structure of the mesoscale eddies showed warmer and saltier anomalies for AEs from the southwest to the northeast side, as well as colder and less salty anomalies from their southeast side for the CEs. This reflects the main features of the basin‐scale temperature and salinity gradients, strongly affected by the Norwegian Atlantic Slope Current. Mean zonal eddy‐induced transport of volume, heat, and salt is generally westward, consistent with the key role played by eddies generated by the Norwegian Atlantic Slope Current. The obtained results highlight the significant role played by mesoscale eddies in the oceanic circulation of the Lofoten Basin, as well as on heat and salt budgets of a key region for air‐sea exchanges, water mass transformation, and climate.

中文翻译:

挪威罗弗敦海盆中尺度涡旋的三维结构:基于测高和原位数据的综合分析

在这项研究中,从卫星测高仪获得的以涡旋为中心的坐标中的温度和盐度剖面(通过卫星海洋学数据的存档,验证和解释分布的涡旋数据集)被组合起来以记录气旋(CEs)和反气旋(罗弗敦盆地的AEs涡流。对于两种极性的涡流,涡流引起的异常异常都集中在零涡度半径内,垂直方向深度约为900-1,000 m。CEs和AEs的盐卤垂直结构在盐度和温度异常方面有所不同。中尺度涡流的水平结构显示,从西南到东北侧,AE的异常温暖和咸,而对于东南部,从东南侧的异常偏冷和咸。这反映了受挪威大西洋斜流强烈影响的盆地尺度温度和盐度梯度的主要特征。区域性涡流引起的体积,热量和盐分的平均输送通常是向西的,这与挪威大西洋斜流产生的涡流所起的关键作用一致。获得的结果突出表明,中尺度涡旋在罗弗敦盆地的海洋环流以及重要的海,海交换,水质转化和气候区域的热量和盐分预算中发挥了重要作用。与挪威大西洋斜流产生的涡流所起的关键作用一致。获得的结果突出表明,中尺度涡旋在罗弗敦盆地的海洋环流以及重要的海,海交换,水质转化和气候区域的热量和盐分预算中发挥了重要作用。与挪威大西洋斜流产生的涡流所起的关键作用一致。获得的结果突出表明,中尺度涡旋在罗弗敦盆地的海洋环流以及重要的海,海交换,水质转化和气候区域的热量和盐分预算中发挥了重要作用。
更新日期:2020-09-26
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