ENSO及印度洋海盆模态关联的南海SST异常年代际变化及海洋平流输送的贡献

发布时间：2019-01-30 18:55

【摘要】：采用国际海—气综合数据集(The International Comprehensive Ocean-Atmosphere Data Set,ICOADS)船舶观测资料及简单海洋同化分析数据(Simple Ocean Data Assimilation,SODA),研究了厄尔尼诺(El Ni?o-Southern Oscillation,ENSO)和印度洋海盆模态(Indian Ocean Basin,IOB)对南海海表温度(sea surface temperature,SST)影响的年代际变化,并着重讨论了不同时期海洋平流输送对SST异常的影响。结果表明,ENSO事件对南海SST的影响呈现显著的年代际变化特征;在1870~2007年期间,扣除资料较少的时期,有4个显著不同的时段,分别是1892~1915年、1930~1940年、1960~1983年、1984~2007年。在1950年之前的两个时段,南海在ENSO期间出现一次显著的增暖,而在1950年之后的两个时段中,南海出现了两次显著的增暖。除第一个时段外,其余三个时段ENSO发展期冬季大气潜热及短波辐射异常是导致南海增暖的主要原因,海洋平流作用较弱;而在最近的两个时段中,海洋平流对ENSO消亡年夏季南海增暖有重要影响。不同时段海洋平流对南海增暖贡献的差异说明ENSO及IOB对南海区域气候的影响具有明显的年代际变化特征。
[Abstract]:In this paper, the El Ni?o-Southern Oscillation, (El Ni?o-Southern Oscillation,) is studied by using the ship observation data (The International Comprehensive Ocean-Atmosphere Data Set,ICOADS) and the simple ocean assimilation analysis data (Simple Ocean Data Assimilation,SODA) from the international air-sea integrated data set (The International Comprehensive Ocean-Atmosphere Data Set,ICOADS). The Interdecadal variation of ENSO and (Indian Ocean Basin,IOB) on the sea surface temperature (sea surface temperature,SST) of the South China Sea is discussed, and the influence of ocean advection on SST anomaly in different periods is discussed. The results show that the influence of ENSO events on SST in the South China Sea shows a significant Interdecadal variation, and during the period of 1870 ~ 2007, there are four distinct periods in which the data are less, namely, 1892 ~ 1915, 1930 ~ 1940, 1960-1983, 1984-2007. During the two periods before 1950, there was a significant warming in the South China Sea during ENSO, and two significant warming in the South China Sea during the two periods after 1950. Except for the first period, the anomalies of atmospheric latent heat and short-wave radiation in winter during the ENSO development period are the main causes of the warming in the South China Sea, and the oceanic advection is weak. In the last two periods, ocean advection plays an important role in the warming of the South China Sea in the summer of ENSO. The difference of the contribution of ocean advection to the South China Sea warming indicates that the effects of ENSO and IOB on the regional climate of the South China Sea have obvious decadal variation characteristics.
【作者单位】：热带海洋环境国家重点实验室(中国科学院南海海洋研究所);中国科学院大学;
【基金】：中国科学院先导专项(XDA11010103) 国家重点基础研究发展计划(“973”)项目(2012CB955603)~~
【分类号】：P732.6

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