西太平洋暖池热含量与南海夏季风强度的关系

发布时间：2018-01-02 08:13

本文关键词：西太平洋暖池热含量与南海夏季风强度的关系　出处：《海洋科学》2016年03期 　论文类型：期刊论文

【摘要】：为了进一步明确西太平洋暖池热含量对南海夏季风强度的影响,利用1948~2012年日本气象厅(japan meteorological agency,JMA)逐月的海温资料、Hadley中心的海表面温度(Sea Surface Temperature,SST)资料以及NCEP/NCAR再分析资料,分析比较了南海夏季风强度与热带太平洋上层海洋热含量和SST的关系;探讨了海洋热含量影响南海夏季风强度的机制。结果表明:(1)相比于西太暖池SST,西太暖池上层海洋热含量是南海夏季风强度更好的预测因子;(2)前期冬春季的西太平洋暖池热含量与南海夏季风强度呈现显著的正相关,尤其在3月,二者相关系数最大;当暖池热含量偏高(低)时,西太平洋副热带高压偏弱(强),赤道印度洋出现异常反气旋(气旋),印度洋上空的Walker环流分支偏强(弱),南海越赤道气流增强(减弱),最终使得南海夏季风强度偏强(弱)。
[Abstract]:In order to further clarify the influence of the heat content in the western Pacific warm pool on the intensity of the South China Sea summer monsoon. The monthly SST data of Japan meteorological meteorological (JMA) from 1948-#date0# were used. Sea Surface temperature data and NCEP/NCAR reanalysis data from Hadley Center. The relationship between the intensity of the South China Sea summer monsoon and the heat content and SST in the upper tropical Pacific is analyzed and compared. The effect of ocean heat content on the intensity of the South China Sea summer monsoon is discussed. The results show that the upper ocean heat content of the west Pacific warm pool is a better predictor of the intensity of the South China Sea summer monsoon than that of the West Pacific warm pool. (2) there was a significant positive correlation between the heat content of the western Pacific warm pool and the intensity of the South China Sea summer monsoon in the early winter and spring, especially in March, the correlation coefficient between them was the largest; When the heat content in the warm pool is high (low), the western Pacific subtropical high is weak (strong), the anomalous anticyclone appears in the equatorial Indian Ocean (cyclone), and the Walker circulation branch over the Indian Ocean is strong (weak). The intensity of the South China Sea summer monsoon is strong (weak) due to the enhancement (weakening) of the cross-equatorial current in the South China Sea.
【作者单位】：中国科学院海洋研究所;中国科学院大学;中国科学院海洋环流与波动重点实验室;
【基金】：中国科学院战略性先导科技专项(XDA01010101) 国家自然科学基金NSFC(41330963;41476017;41421005) NSFC-山东省人民政府联合资助海洋科学研究中心项目(U1406401)~~
【分类号】：P461.2;P731
【正文快照】： 我国属于典型的季风气候,东亚夏季风对我国人民的生活、生产有重要的影响。而南海夏季风作为东亚夏季风的重要分支,暴发的早晚、强弱与我国夏季雨带的分布有着非常密切的关系。吴尚森等[1]指出南海夏季风强度与我国汛期降水存在显著相关,在南海夏季风强(弱)年,我国夏季雨带型

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