东海陆架区中尺度涡运动路径的统计特征分析

doi:10.3969/j.issn.1001-909X.2020.01.009

海洋学研究 ›› 2020, Vol. 38 ›› Issue (1): 77-86.DOI: 10.3969/j.issn.1001-909X.2020.01.009

东海陆架区中尺度涡运动路径的统计特征分析

张桃^1,2, 李君益^*1,2, 谢玲玲^1,2, 郑少军^1,2, 郑慧源¹

1.广东海洋大学广东省近海海洋变化与灾害预警重点实验室,广东湛江 524088;
2.南方海洋科学与工程广东省实验室湛江南海资源大数据中心,广东湛江 524088

收稿日期:2019-11-19 出版日期:2020-03-15 发布日期:2022-11-14
通讯作者: *李君益(1984-),男,讲师,主要从事陆架海动力过程、海洋生态遥感、海气相互作用方面的研究。E-mail:junyiocean@outlook.com
作者简介:张桃(1995-),女,贵州省贵阳市人,主要从事陆架海中尺度涡运动方面的研究。E-mail:zhangtao_gy@163.com
基金资助:
国家自然科学基金资助(41706025);广东海洋大学科研启动经费项目资助(R17052)

Statistical characteristics and path analysis of mesoscale eddy in the East China Sea

ZHANG Tao^1,2, LI Junyi^*1,2, XIE Lingling^1,2, ZHENG Shaojun^1,2, ZHENG Huiyuan¹

1. Guangdong Key Laboratory of Coastal Ocean Variation and Disaster Prediction, Guangdong Ocean University, Zhanjiang 524088, China;
2. Marine Resources Big Data Center of South China Sea, Southern Marine Science and Engineering Guangdong LaboratoryZhanjiang, Zhanjiang 524088, China

Received:2019-11-19 Online:2020-03-15 Published:2022-11-14

摘要/Abstract

摘要： 基于1993—2017年卫星高度计海面高度异常中尺度涡旋追踪数据集,对东海陆架区及从西北太平洋入侵东海的涡旋进行路径分类、季节变化及特征参量统计分析,并结合再分析流场资料,进行背景流场、涡度场分析。研究结果显示,近25 a,在东海追踪到318个气旋涡和276个反气旋涡。根据涡旋运动路径将其分为:东海陆架浅海生成往深海传播型(148个)、深海生成向东海陆架浅海传播型(35个)、沿等深线运动型(180个)、徘徊型(121个)、外来入侵到达东海陆架型(25个)及外来入侵到达东海深海型(85个)。6类涡旋的数量存在明显的季节分布,各个类型气旋与反气旋涡数量的季节分布也各不相同。其中,沿等深线运动型涡在春、夏季的数量高于秋、冬季。陆架浅海区生成往深海运动型涡的季节分布较为平均,气旋式涡在夏季数量最少,在春季和冬季数量较多。黑潮与涡旋数量的季节分布有关。徘徊型涡的平均生命周期最长,约为44 d;陆架浅海生成往深海运动型及外来入侵到达东海陆架的中尺度涡具有最大的平均振幅,为13.2 cm;外来入侵到达东海陆架型涡具有最大的直径,为122 km;外来入侵到达东海深海型涡在进入东海后的生命周期、振幅、直径在数值上均为最小。

关键词: 东海陆架, 中尺度涡, 运动路径

Abstract: An Archiving Validation and Interpretation of Satellite Oceanographic(AVISO) mesoscale eddy tracking dataset from satellite altimeter during the period from 1993 to 2017 was used to classify the mesoscale eddies in the East China Sea(ECS) according to the path. The results show that 318 cyclones and 276 anticyclones were detected in the ECS during the 25-year period. These mesoscale eddies were classified into the following types according to the path: (1) Eddy generated on the continental shelf of the ECS intrudes into deep sea(148 cases); (2) Eddy generated in deep sea intrudes into the continental shelf of the ECS(35 cases); (3) Eddy spreads along the isobath(180 cases); (4) Eddy wanders around(121 cases); (5) Eddy generated in Pacific Ocean intrudes into the shelf area of the ECS(25 cases) and (6) Eddy generated in Pacific Ocean intrudes into the ECS(85 cases). There existed very obvious seasonality for these six types. And the seasonal distribution for cyclones and anticyclones is diverse. The quantity of eddies for the type 3 is higher in spring and summer, lower in autumn and winter. The distribution of eddies for the type 1 is more evenly. The quantity of cyclones for the type 1 is the lowest in summer, and higher in spring and winter. The seasonal distribution for mesoscale eddies is related to the variations of the Kuroshio. The mean lifetime of eddies for type 4 is the longest, about 44 days. The mean amplitudes of eddies for type 1 and 5 are the largest, about 13.2 cm. The maximum mean diameter of the eddies is for type 5, about 122 km. The mean lifetime, amplitude and diameter of eddies for type 6 are the smallest.

Key words: East China Sea continental shelf, mesoscale eddy, motion path

中图分类号:

P731

张桃, 李君益, 谢玲玲, 郑少军, 郑慧源. 东海陆架区中尺度涡运动路径的统计特征分析[J]. 海洋学研究, 2020, 38(1): 77-86.

ZHANG Tao, LI Junyi, XIE Lingling, ZHENG Shaojun, ZHENG Huiyuan. Statistical characteristics and path analysis of mesoscale eddy in the East China Sea[J]. Journal of Marine Sciences, 2020, 38(1): 77-86.

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东海陆架区中尺度涡运动路径的统计特征分析

Statistical characteristics and path analysis of mesoscale eddy in the East China Sea

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