气象科学2012，Vol.32Issue(6)：678-684,7.DOI:10.3969/2012jms.0034
江苏6-7月降水与前期澳大利亚高压及相关海温异常的关系
The relationship between Australian high and related SST anomaly in May and the flood period precipitation
摘要
Abstract
Based on Australian high pressure and 107 rainfall station data in June and July in China, the relationship between Australian high (AH) in May and precipitation in flood period in south of the Yangtze-Hua region is analyzed by using SVD. The results show that a good correlation exists between time coefficients of the first mode of SVD ( SVD1) and Australian high index in May. The SVD1 time coefficients of pressure field can denote the Australian high variation. With the reinforcing (decreasing) of Australian high, the total precipitation in flood period in Yangtze-Hua region will be significantly more (less) than normal. The main way how Australian high effects precipitation in flood period is as follows; when Australian high is stronger than normal, anomalies of SST A in regions around Indonesia are continuously negative. It may induce abnormal divergence in low-level wind field and anomalous anti-cyclonic circulation in west Pacific, so it is biased towards the stronger Australian high and lying father west than normal position, and reinforcing warm and wet flow transportation from south to north. On the other side, low SST causes abnormal downdraft and provokes abnormal updraft in Yangtze-Hua via waves similar to EAP.关键词
降水/澳大利亚高压/海温异常/正相关Key words
Period precipitation/Australian high/SST anomaly/Positive correlation分类
天文与地球科学引用本文复制引用
张蓬勃,裴海瑛,钱玮,姜爱军,蒋薇..江苏6-7月降水与前期澳大利亚高压及相关海温异常的关系[J].气象科学,2012,32(6):678-684,7.基金项目
国家科技支撑计划项目(2011BAK21B04) （2011BAK21B04）
南京市科学技术委员会科技发展计划项目(201001070) （201001070）
科技厅科技支撑计划-社会发展项目(BE2011612) （BE2011612）
