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THE RELATIONSHIP BETWEEN EXTREME PRECIPITATION ANOMALY IN SOUTH OF CHINA AND ATMOSPHERIC CIRCULATION IN THE SOUTHERN HEMISPHERE

ISSN号：1006-8775
期刊名称：《热带气象学报：英文版》
时间：0
分类：P461[天文地球—大气科学及气象学]
作者机构：[1]School of Atmospheric Sciences, Institute of Severe Weather and Climate, Nanjing University, Nanjing 210093 China, [2]State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing China 210008
相关基金：Foundation item： National Basic Research Program of China （2004CB418300, 2010CB833406） and National Natural Science Foundation of China （40675042, 40890054, 40871007）

作者：闵屾[1,2], 钱永甫[1]

关键词：中国的南方, 极端降水, 异例, 罗斯·塞纽, Zealand, south of China, extreme precipitation, anomaly, Ross Sea-New Zealand

中文摘要：

在 1960-2003 的时期期间在中国和 NCEP/NCAR 每月的分析数据基于 743 个车站的每日的降雨数据集，在在在南部的半球的中国和大气的循环的南方的异常极端降水(EP ) 之间的关系被分析。在在粗糙表面海和新西兰上的海水平压力和 geopotential 高度异例的相反的变化的现象被定义为 RN，并且描述这现象的索引被表示为 RNI。结果证明 RN 有 barotropic 结构，在 5 月的 RNI 是仔细在中国(SCEP ) 和东方亚洲夏天季风(EASM ) 的南方与 6 月 EP 有关总计。在在每水平和 6 月 SCEP 的 5 月 RNI 之间的积极关联是重要的，并且在 RNI 之间的相关同时的关联和 6 月 SCEP 也是积极的，建议 SCEP 上的 RN 的潜在的影响从 5 月坚持到 6 月。因此，在 5 月的 RN 能为 6 月 SCEP 作为预兆的因素之一被拿。而且， RN 由影响 6 月 SCEP 的一可能的物理机制是 barotropic 从南部的半球发出到西方的诺思太平洋的南方的 teleconnection。

英文摘要：

Based on the daily rainfall datasets of 743 stations in China and the NCEP/NCAR monthly reanalysis data during the period of 1960- 2003, the relationship between the anomalous extreme precipitation （EP） in the south of China and atmospheric circulation in the Southern Hemisphere is analyzed. The phenomenon of opposite changes in the sea level pressure and geopotential height anomalies over the Ross Sea and New Zealand is defined as RN, and the index which describes this phenomenon is expressed as RNI. The results show that the RN has barotropic structure and the RNI in May is closely related to the June EP amount in the south of China （SCEP） and the East Asian summer monsoon （EASM）. The positive correlations between the May RNI at each level and the June SCEP are significant, and the related simultaneous correlations between the RNI and the June SCEP are also positive, suggesting that the potential impact of RN on the SCEP persists from May to June. Therefore, RN in May can be taken as one of the predictive factors for the June SCEP. Furthermore, one possible physical mechanism by which the RN affects the June SCEP is a barotropic meridional teleconnection emanating from the Southern Hemisphere to the western North Pacific.