Department of Atmospheric Sciences, Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL 33149.
Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139.
Proc Natl Acad Sci U S A. 2019 Sep 10;116(37):18251-18256. doi: 10.1073/pnas.1701392115. Epub 2018 Mar 5.
The emergence of coherent Lagrangian swirls (CLSs) among submesoscale motions in the ocean is illustrated. This is done by applying recent nonlinear dynamics tools for Lagrangian coherence detection on a surface flow realization produced by a data-assimilative submesoscale-permitting ocean general circulation model simulation of the Gulf of Mexico. Both mesoscale and submesoscale CLSs are extracted. These extractions prove the relevance of coherent Lagrangian eddies detected in satellite-altimetry-based geostrophic flow data for the arguably more realistic ageostrophic multiscale flow.
文中展示了海洋次中尺度运动中相干拉格朗日涡旋(CLS)的出现。这是通过应用最新的非线性动力学工具对墨西哥湾数据同化次中尺度允许海洋环流模型模拟产生的表面流实现进行拉格朗日相干检测来实现的。提取了中尺度和次中尺度 CLS。这些提取结果证明了基于卫星测高的地转流数据中检测到的相干拉格朗日涡旋对于更具现实意义的非地转多尺度流的相关性。