王晓芳,何金海,廉毅. 2013. 前期西太平洋暖池热含量异常对中国东北地区夏季降水的影响[J]. 气象学报, 71(2):305-317, doi:10.11676/qxxb2013.024
前期西太平洋暖池热含量异常对中国东北地区夏季降水的影响
Effect of the previous anomalous heat content in the western Pacific warm pool on the summer rainfall over northeast China
投稿时间:2012-06-20  修订日期:2012-08-21
DOI:10.11676/qxxb2013.024
中文关键词:  东北夏季降水  西太平洋暖池  热含量  西太平洋副热带高压  遥相关
英文关键词:Summer rainfall over Northeast China  Western Pacific warm pool  Heat content  Western Pacific subtropical high  Teleconnection
基金项目:自然利学基金项目(41075068);国家重点基础研究发展计划(973计划)项目(2012C8417403)和江苏高校优势学利建设工程资助项目(PAPD)
作者单位E-mail
王晓芳 南京信息工程大学气象灾害省部共建教育部重点实验室, 南京, 210044  
何金海 南京信息工程大学气象灾害省部共建教育部重点实验室, 南京, 210044 hejhnew@nuist.edu.cn 
廉毅 中高纬度环流系统与东亚季风研究开放实验室, 长春, 130062  
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中文摘要:
      利用日本气象厅历史海温资料、NCEP/NCAR 再分析资料、哈得来环流中心海表温度资料和降水资料, 研究了 1951-2010年中国东北地区夏季降水与前期西太平洋暖池(简称暖池)热含量异常的关系, 并对可能影响途径进行了探讨。结果表明, 中国东北地区夏季降水与前期暖池热含量有密切的负相关, 前期10-11月暖池关键区(15.5°-20.5°N,125.5°- 135.5°E)0-200m 热含量高(低)是预报中国东北地区夏季旱(涝)的一个很好的指标。前期暖池热含量异常激发的夏季东 亚-太平洋型遥相关(EAP)和中纬度高层沿亚洲西风急流东传波列的存在, 可能是影响中国东北地区夏季降水的主要原因。 当前期10-11月暖池区热含量为负异常时, 菲律宾反气旋异常持续存在, 夏季东亚-太平洋遥相关型出现, 导致西太平洋副热 带高压西伸加强, 中国东北地区局地异常低气压和鄂霍次克海阻塞高压形成。同时, 高空存在沿西风急流传播的遥相关波 列, 使得中国东北地区局地异常低气压和西太平洋副热带高压在日本附近增强, 有利于中国东北地区夏季降水偏多;反之亦然。
英文摘要:
      The relationship between the summer rainfall over Northeast China and the previous heat content anomaly in the western Pacific warm pool(WPWP) and the way how heat content anomaly probably affects the precipitation in Northeast China has been investigated by using the historical ocean temperature analysis data provided by Japan Meteorological Agency, the NCEP/NCAR reanalysis data, the Hadley Centre sea surface temperature(SST) dataset and rainfall data. The results show that there is a close negative corrclationship between the summer rainfall over Northeast China and the previous heat content a-nomaly in the WPWP, through which a good predictor, i. e. the 0-200 m heat content averaged over October to November in the key area(15.5°-20.5°N, 125.5°-135.5°E) of the WPWP, is found for the precipitation of the following summer in Northeast China. The East Asia-Pacific(EAP) teleconnection stimulated by the previous heat content anomaly of the WPWP. and the wave train propagating eastward along the Asian westerly jet stream in the upper level of the mid-latitude region may be the main reason that influences the summer rainfall over Northeast China. When the 0-200 m heat content over the previous October to November in the key area is negative, the anomalous Philippine Sea anticyclone persists and EAP teleconnection appears during the summertime, leading to the westward extending and enhancing of the western Pacific sub- tropical high(WPSH) as well as the formation of the local anomalous cyclone over Northeast China and the Okhotsk blocking high. Meanwhile there exists a teleconnection wave train propagating eastward along the Asian westerly jet stream in the upper troposphere so that the local anomalous cyclone over Northeast China and WPSH near Japan can be enhanced, which is conducive to more rain in Northeast China. Otherwise, the summer rainfall is suppressed.
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