文章摘要
张萍1,3,徐峰1,2,涂石飞1,2,季倩倩1,2,陈思奇1,2,张羽4.1979—2017年南海SSTA时空特征及其与沃克环流异常的相关[J].海洋气象学报,2019,39(1):15-25
1979—2017年南海SSTA时空特征及其与沃克环流异常的相关
Spatial and temporal characteristics of the SSTA in the South China Sea from 1979 to 2017 and its correlation with the Walker circulationn anomaly
  
DOI:10.19513/j.cnki.issn2096-3599.2019.01.002
中文关键词: 南海SSTA  时空分布  ENSO  Walker环流  相关分析
英文关键词: SSTA in the South China Sea  spatial and temporal distribution  ENSO  the Walker circulation  correlation analysis
基金项目:国家重点研发计划项目(2018YFA0605604);国家自然科学基金项目(41475120);国家级大学生创新创业项目(CXXL2016010);广东省自然科学基金重大基础研究培育项目(2015A03030801)
作者单位
张萍1,3,徐峰1,2,涂石飞1,2,季倩倩1,2,陈思奇1,2,张羽4 (1. 广东海洋大学海洋与气象学院广东 湛江 5240882. 广东海洋大学南海海洋气象研究院广东 湛江 5240883.中国科学院大气物理研究所北京 1000294.广东省气候中心广东 广州510640) 
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中文摘要:
   利用1979—2017年HadISST月平均海面温度资料、ERA-Interim大气资料以及GPCP Version 2.3集合降水资料,分析了南海海面温度距平(SSTA)场的时空分布特征,并从南海降水异常的角度探讨了在ENSO期间,沃克(Walker)环流异常对南海海面温度异常(SSTA)的影响过程。结果表明,南海SSTA场分别存在全海域一致模态、东西反位相的偶极子模态以及纬向三级子正负位相三个主要模态,且三个模态都具有显著的准2 a及4 a左右的年际振荡周期,反映了南海SSTA与ENSO现象的高度相关性。对Walker环流异常的分析表明,Walker环流异常与ENSO事件及南海SSTA存在较好的相关。ENSO事件发生时,Walker环流异常移动通过“云辐射反馈过程”,使得南海海面温度(SST)发生改变,因此Walker环流在ENSO影响南海SST异常过程中起到“大气桥”的作用。
英文摘要:
   The spatial and temporal variations of the sea surface temperature anomaly (SSTA) in the South China Sea (SCS) are analyzed and the influencing process of the Walker circulation anomaly on the SSTA in the SCS during the ENSO period is discussed from the perspective of the precipitation anomaly by using monthly mean sea surface temperature (SST) provided by HadISST, ERA-Interim reanalysis data, and GPCP Version 2.3 Combined Precipitation Data Set. The results show that the SSTA field in the SCS has three major modes, including the homogenous structure mode, the eastwest out-of-phase dipole mode, and zonal triple mode. The three modes have significant quasi-biennial oscillation and quasi-quadrennial oscillation, which reflects a high correlation between the SSTA in the SCS and the ENSO phenomenon. And the analysis of the Walker circulation anomaly shows that the Walker circulation anomaly has a good correlation with the ENSO phenomenon and the SSTA in the SCS. When the ENSO event occurs, the anomalous movement of the Walker circulation changes the SST in the SCS through “cloud-radiation feedback process”. The Walker circulation acts as an “atmospheric bridge” during ENSO's influence on the SSTA in the SCS.
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