Baroclinic structure of oceanic rings

摘要：

The baroclinic structure of oceanic rings is studied through observational data and numerical simulation. Based on the newly discovered geostrophic empirical mode (GEM), which represents a low-dimensional coherent structure in oceanic baroclinic fields, we are able to construct equivalent-barotropic ring solutions that describe the observed velocity and density distribution. Unlike the previous layer-model approach, the GEM vortex solution is intended for continuously stratified fluids. It allows us to conduct a series of numerical experiments with general circulation models, from which the phenomenon that geophysical vortex tends to evolve to a vertical alignment state with horizontally axisymmetric shape is investigated.

关键词： oceanic rings baroclinic geostrophic empirical mode vertical alignment axisymmetrization

作者: L.Zhang C.Sun

作者单位: Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071 China;Graduate School of Chine Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071 China

会议类型: 国际会议

会议名称: The Fifth International Conference on Fluid Mechanics(第五届国际流体力学会议)

会议地点: 上海

会议语种:英文

在线出版日期: 2007-08-15（万方平台首次上网日期，不代表论文的发表时间）