吕宋暖涡的三维观测特征及其数值模拟分析  

Observed 3D Structure and Simulation Analysis of Luzon Warm Eddy

作　　者：门国蕊 马伟伟 万修全 MEN Guo-Rui;MA Wei-Wei;WAN Xia-Quan(College of Oceanic and Atomospheric Sciences,Ocean University of China,Qingdao 266100,China)

机构地区：[1]中国海洋大学海洋与大气学院

出　　处：《中国海洋大学学报（自然科学版）》2020年第1期11-20,共10页Periodical of Ocean University of China

基　　金：国家重点基础研究发展计划项目(2014CB745001);国家自然科学基金项目(41576004; 41776009);国家重点研究发展计划项目(2016YFC1401302)资助~~

摘　　要：基于2011年春季南海北部CTD观测数据,结合高度计资料和高分辨率ROMS(Regional Ocean Modeling System,ROMS)模式对1993-2003年的模拟结果,研究了吕宋暖涡(Luzon Warm Eddy)的空间结构和生成规律。结果表明:观测中吕宋岛西北海域存在一对冷暖涡旋,其中暖涡信号是一次典型的吕宋暖涡事件,水团中携带了部分的黑潮水;该吕宋暖涡对温盐、流场结构的影响能够达到中层以下,在垂向上呈现出西北向倾斜的特征,自表层至1000 m深度范围,倾斜距离超过70 km。受到5月来自黑潮区的高水位信号影响,吕宋暖涡生成于吕宋西北局地并逐渐发展增强,持续时间达30天以上,之后向西移动,同时其后缘常伴随生成一个冷涡。在10年的数值结果中,吕宋暖涡的生成、演变过程,及其三维结构的西北向倾斜特征均与观测较为一致,模式初步证明了吕宋暖涡的演变过程是一种季节性现象。Using the CTD observations during the spring of 2011,combined with the altimeter data and high-resolution ROMS(Regional Ocean Modeling System)simulation outputs,the spatial structure of the Luzon Warm Eddy(LWE)and its generation and evolution are studied.Cold and warm cores in the northwest of Luzon Island corresponding to a pair of cold and warm eddies are captured,and the warm eddy which carries part of Kuroshio water can be identified as a typical LWE event.The influence of LWE on vertical structure of temperature,salinity and current fields can reach below intermediate layer.What’s more,the axis of the LWE tilts northwestward,and the tilting distance exceeds 70 km within a depth of 1000 m.Driven by high sea surface height anomalies in Kuroshio during May,LWE generates in the northwest of Luzon Island and then gradually develops and strengthens.This process lasts for more than 30 days until LWE moving westward accompanied with a cold eddy in its trailing edge.The generation,evolution and dissipation of LWE,as well as the northwestward tilt characteristic of spatial vertical structures are consistent with observations and ten-year numerical simulation.The model results preliminarily prove that the evolution of LWE is a seasonal phenomenon.

关 键 词：南海 CTD 吕宋暖涡 ROMS 三维结构 生成规律 

分 类 号：P731.16[天文地球—海洋科学]