By employing the NCEP/NCAR reanalysis data sets (1000-10hPa, 2.5°× 2.5°), the characteristics have been analyzed of the structure and evolution of an easterly vortex over the tropical upper troposphere relating to the east-west direction shift of the subtropical anticyclone over the Western Pacific Ocean. It is shown that there exists a westward shift simultaneously between the anticyclone and the vortex locating south of it. The anticyclone retreats eastward abnormally while the easterly encounters with th...
【英文摘要】
By employing the NCEP/NCAR reanalysis data sets (1000-10hPa, 2.5° × 2.5°), the characteristics have been analyzed of the structure and evolution of an easterly vortex over the tropical upper troposphere relating to the east-west direction shift of the subtropical anticyclone over the Western Pacific Ocean. It is shown that there exists a westward shift simultaneously between the anticyclone and the vortex locating south of it. The anticyclone retreats eastward abnormally while the easterly encounters with t...
【基金】
Open Research Fund for 2006 from State Key Laboratory Severe Weather, Chinese Academyof Meteorological Sciences (2006LASW08);
Development and Planning Project for Key State FundamentalResearch (2006CB403607; 2004CB418300)
【更新日期】
2008-07-14
【分类号】
P434
【正文快照】
1 INTRODUCTION As one of the members of the East Asian monsoon system, the west Pacific subtropical high has huge impacts on the heavy rain during Mei-yu (sustaining) rain in eastern China. Its seasonal shifts to the north and relationship with Mei-yu rai
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