A statistical analysis of mesoscale eddies in the Bay of Bengal from 22-year altimetry data

CUI Wei YANG Jungang MA Yi

崔伟, 杨俊钢, 马毅. 基于22年高度计数据的孟加拉湾中尺度涡分析研究[J]. 海洋学报英文版, 2016, 35(11): 16-27. doi: 10.1007/s13131-016-0945-3
引用本文: 崔伟, 杨俊钢, 马毅. 基于22年高度计数据的孟加拉湾中尺度涡分析研究[J]. 海洋学报英文版, 2016, 35(11): 16-27. doi: 10.1007/s13131-016-0945-3
CUI Wei, YANG Jungang, MA Yi. A statistical analysis of mesoscale eddies in the Bay of Bengal from 22-year altimetry data[J]. Acta Oceanologica Sinica, 2016, 35(11): 16-27. doi: 10.1007/s13131-016-0945-3
Citation: CUI Wei, YANG Jungang, MA Yi. A statistical analysis of mesoscale eddies in the Bay of Bengal from 22-year altimetry data[J]. Acta Oceanologica Sinica, 2016, 35(11): 16-27. doi: 10.1007/s13131-016-0945-3

基于22年高度计数据的孟加拉湾中尺度涡分析研究

doi: 10.1007/s13131-016-0945-3

A statistical analysis of mesoscale eddies in the Bay of Bengal from 22-year altimetry data

  • 摘要: 本文使用一种基于SLA数据的涡旋识别方法,通过22年的AVISO高度计测高数据对孟加拉湾的中尺度涡特征进行了研究。本文主要分析了孟加拉湾涡旋的地理分布、涡旋极性、涡旋生命周期和传播距离、涡旋产生和消失位置、涡旋传播方向和移动轨迹、涡旋运动特征、涡旋属性的演化以及涡旋活动的季节和年际变化等特性。涡旋主要分布在孟加拉湾西部海域,并且大部分涡旋向西移动。涡旋极性分布显示气旋涡更经常出现在湾的西北部和南部,而反气旋涡主要出现在湾的东部。在22年间,共追踪探测到生命周期超过30天的气旋涡565个、反气旋涡389个;对所有生命周期和传播距离而言都是气旋涡数量居多。所有观测到的涡旋的运动属性分析显示气旋涡的涡旋平均振幅大于反气旋涡;对平均半径和平均移动速度而言,气旋涡和反气旋涡相差不大。而且,涡旋属性演化显示生命周期超过90天的涡旋具有明显的双阶段演化特征,包括一个前50天的涡旋成长阶段和一个50天之后的涡旋消亡阶段。针对涡旋活动的季节变化,气旋涡在春季居多而反气旋涡在夏季较多;长生命周期的涡旋季节分布显示在孟加拉湾涡旋活动具有明显的季节分布特征。涡旋数量的年际变化与EKE变化有一个明显的负相关。
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出版历程
  • 收稿日期:  2015-10-08
  • 修回日期:  2015-12-31

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