基于1993-2014年高度计数据的西北太平洋中尺度涡识别和特征分析

崔伟; 王伟; 马毅; 杨俊钢

doi:10.3969/j.issn.0253-4193.2017.02.002

基于1993-2014年高度计数据的西北太平洋中尺度涡识别和特征分析

doi: 10.3969/j.issn.0253-4193.2017.02.002

崔伟¹,
王伟²,
马毅³,
杨俊钢^3,

1.
中国海洋大学物理海洋教育部重点实验室, 山东青岛 266003;国家海洋局第一海洋研究所, 山东青岛 266061
2.
中国海洋大学物理海洋教育部重点实验室, 山东青岛 266003
3.
国家海洋局第一海洋研究所, 山东青岛 266061

基金项目: 国家自然科学基金（41576176）；国家高技术研究发展计划（863）（2013AA122803）；龙计划项目（10466）。

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出版历程
- 收稿日期: 2015-12-02
- 修回日期: 2016-09-19

Identification and analysis of mesoscale eddies in the Northwestern Pacific Ocean from 1993-2014 based on altimetry data

1.
Key Laboratory of Physical Ocanography, Ocean University of China, Ministry of Education, Qingdao 266061, China;First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China
2.
Key Laboratory of Physical Ocanography, Ocean University of China, Ministry of Education, Qingdao 266061, China
3.
First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China

摘要

摘要: 本文利用22年的AVISO卫星高度计融合数据，基于WA涡旋自动识别方法对西北太平洋的中尺度涡进行了识别追踪，并统计分析了研究区域中尺度涡的空间分布特征、运动属性以及季节和年际变化。研究结果表明：22年间共追踪到生命周期超过30 d的气旋涡3 841个，反气旋涡2 836个，气旋涡数量多于反气旋涡。涡旋大部分向西移动，西向传播的涡旋分布在整个研究区域，而东向传播的涡旋则集中在黑潮及其延伸区。涡旋主要存在15°~30°N的纬度带间；分别而言，气旋涡主要分布在研究区域的北部和南部，而反气旋涡主要分布在副热带逆流区。30°~35°N之间的黑潮延伸区具有明显更高的涡动能和涡振幅，与同纬度区域相比这里的涡旋半径也较高。在季节和年际变化上，春季出现的中尺度涡最多，夏季最少；对涡旋的月生成数目与ENSO指数MEI比较发现，西北太平洋涡旋活动变化并不直接与ENSO现象相关。
- 中尺度涡 /
- 西北太平洋 /
- 高度计 /
- 特征分析 /
- 年际变化
Abstract: Eddy properties in the Northwestern Pacific Ocean are studied from 22 years of AVISO altimeter data using a SLA-based eddy identification approach. 3 841 cyclones and 2 836 anticyclones with lifetimes that exceed 30 days are detected during the 22-year period, and there is a preference for cyclones for most of lifetimes and propagation distances. Most mesoscale eddies propagate westward, the westward eddies are distributed everywhere of the area, as well as the eastward eddies occur mainly along Kuroshio Current and in Kuroshio Extension. Eddies exist principally in the latitude band of 15°-30°N, especial in the region near Kuroshio Current. The cyclones prefer to occur in the northern and southern of the area, while anticyclones mainly occur in the Subtropical Countercurrent. There are higher EKE, eddy amplitudes and eddy radii in The Kuroshio Extension of 30°-35°N. Cyclones and anticyclones occur more often in spring than in other seasons. The interannual variability of eddies activities is not obvious, the number of eddies generated every year are distributed in the range of 270-330. The comparison of the monthly variations of the numbers of eddies with Multivariate ENSO Index (MEI) shows that the eddy activities of Northwestern Pacific Ocean do not directly related with the ENSO phenomena.
- mesoscale eddy /
- Northwestern Pacific /
- altimetry data /
- eddy characteristic /
- interannual variability

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