标题:
黑潮延伸体区域海洋涡旋研究进展Review on Mesoscale Eddy Studies in the Kuroshio Extension Region
作者:
张笑, 贾英来, 沈辉, 陈隆京, 刘洋
关键字:
黑潮延伸体, 海洋涡旋, 海面风应力, 海洋–大气相互作用, 时间变化特征Kuroshio Extension; Ocean Eddies; Wind Stress; Ocean-Atmosphere Interaction; Temporal Variation
期刊名称:
《Climate Change Research Letters》, Vol.2 No.1, 2013-01-24
摘要:
黑潮延伸体区域是中纬度海洋–大气相互作用的关键区域，也是海洋涡旋最活跃的区域之一，该区域海洋涡旋不仅对黑潮延伸体区域海洋急流及锋面变化起着重要影响，还是北太平洋副热带模态水生成的重要因素，并在中纬度大气-海洋相互作用过程中起着关键性的作用。本文对近年来有关黑潮延伸体区域海洋涡旋的研究进行了综述，探讨了海洋涡旋的生成及分布特征、移动及时间变化特征及其物理机制等方面的研究进展，并讨论了海洋涡旋在年代际和季节时间尺度上变化机制的异同，以及局地海面风应力对海洋涡旋的影响，为今后黑潮延伸体区域海洋涡旋方面的研究提供背景资料。The Kuroshio Extension (KE) region is the key region in mid-latitude ocean-atmosphere interaction where mesoscale eddies achieve their largest magnitude. Mesoscale eddies’ interaction with the mean flow plays a critical role in Kuroshio meander dynamics. Anticyclonic eddies prevailing in Kuroshio recirculation region are crucial to North Pacific subtropical mode water formation. This paper summarizes works on spatial-temporal characteristics of mesoscale eddies and their interaction with the local wind in the KE region. The characteristics of these eddies, such as spatial distribution, migration speed, water mass structure were intensively studied. The mechanism of the eddy formation was known as the baroclinic instability. The seasonal cycle of the eddy kinetic energy, which has a maximum in summer, is proved. The three dimensional structure, the nonlinearity, the temporal variation, the available gravitational potential energy of mesoscale eddies in the KE region will be the focus of near future study. The interaction between nonlinear eddies and local wind will be investigated to advance the understanding of the role of eddies in the mid-latitude ocean-atmosphere interaction.