摘要
利用1951—2002年NCEP/NCAR再分析资料和中国160站月降水资料,分析了马斯克林高压对江淮梅雨期降水的影响。结果表明:当年4—5月马斯克林高压对6—7月江淮梅汛期降水的影响最大,江淮地区梅雨与前期春季马斯克林高压存在显著正相关关系,梅汛期的大气环流与春季马斯克林高压联系紧密,春季马斯克林高压偏强,则东亚夏季风偏强、副热带高压偏强、副高西脊点偏西、副高北界偏南,有利于江淮地区梅汛期降水增加;反之亦然。研究还表明,马斯克林高压对江淮南部地区梅汛期降水影响较大,对江淮北部不明显。
Using the NCEP/NCAR reanalyzing data and monthly rainfall data at 160 stations in China from 1951 to 2002 ,this paper analyzes the influence of the variation of Mascarene high（MH） on Meiyu in the Changjiang-Huaihe basin from 1951 to 2002. Results show that MH in April-May impacts Meiyu precipitation in the Changjiang-Huaihe basin most. There is a strong positive correlation between Mascarene high in spring and Meiyu precipitation in the Changjiang-Huaihe basin, while there is a close correlation between MH in spring and atmospheric circulation systems in summer. When the April-May MH is stronger, the East Asian summer monsoon is stronger, and the Western Pacific subtropical high tends to be intensified with a more southwestward position which result in more rainfall in the Changjiang-Huaihe basin, and vice versa. Further analysis indicates that the influence of MH is stronger in the south of the Changjiang-Huaihe basin than in the north. The results are of benefit to the prediction of Meiyu precipitation in the Changjiang-Hualhe basin.
出处
《南京气象学院学报》
CSCD
北大核心
2007年第6期786-791,共6页
Journal of Nanjing Institute of Meteorology
基金
国家重点基础研究发展计划项目(2004CB418303)
江苏省气象灾害重点实验室资助项目(KLME050304)
关键词
马斯克林高压
梅雨
江淮地区
Mascarene high
Meiyu
Changjiang-Huaihe basin
