Dynamical mechanism of the stratospheric quasi-biennial oscillation impact on the South China Sea Summer Monsoon

被引：0
作者：
Bin Zheng
DeJun Gu
AiLan Lin
ChunHui Li
机构：
[1] China Meteorological Administration,Guangzhou Institute of Tropical and Marine Meteorology/Key Open Laboratory for Tropical Monsoon
来源：
Science in China Series D: Earth Sciences | 2007年 / 50卷
关键词：
stratospheric quasi-biennial oscillation; South China Sea Summer Monsoon; tropospheric biennial oscillation;
D O I：
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中图分类号：
学科分类号：
摘要：
The National Center for the Atmospheric Research (NCAR) middle atmospheric model is used to study the effects of the quasi-biennial oscillation in the stratosphere (QBO) on the tropopause and upper troposphere, and the relationship between the QBO and South China Sea Summer Monsoon (SCSSM) is explored through NCEP (the National Centers for Environmental Prediction)/NCAR, ECMWF (European Centre for Medium-Range Weather Forecasts) monthly mean wind data and in situ sounding data. The simulations show that the QBO-induced residual circulations propagate downwards, and affect the tropopause and upper troposphere during the periods of mid-late QBO phase and phase transition. Meanwhile, diagnostic analyses indicate that anomalous circulation similar to SCSSM circulation is generated to strengthen the SCSSM during the easterly phase and anomalous Hadley-like circulation weakens the SCSSM during the westerly. Though the QBO has effects on the SCSSM by meridional circulation, it is not a sole mechanism on the SCSSM TBO mode.
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页码：1424 / 1432
页数：8
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