STRUCTURE OF SOUTH ASIA HIGH IN THE STRATOSPHERE AND INFLUENCE OF ENSO
STRUCTURE OF SOUTH ASIA HIGH IN THE STRATOSPHERE AND INFLUENCE OF ENSO
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发表时间：
2011
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通讯作者：
Li Chong-Yin
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作者：
Li Chong-Yin
利用ECMWF的长期再分析资料，系统地研究了平流层南亚高压（SAH）的结构以及ENSO对南亚高压的影响。结果表明，南亚高压只存在于平流层低层。高压最大强度位于150 hPa左右，50 hPa以上没有明显的反气旋结构。南亚高压中心轴线由低向高向西北倾斜。进一步分析表明，在厄尔尼诺现象期间，南亚海区的位势高度场和温度场存在显著异常。9年和拉尼娜？一年了。与ENSO相对应，南亚高压在暖（冷）相减弱（增强）。
The structure of the South Asia High(SAH)in the stratosphere and the influence of ENSO on the SAH are systematically investigated with the long-term ECMWF reanalysis data.The results show that the SAH only exists in low levels of the stratosphere.The maximum intensity of the High is located at around 150 hPa and there is no obvious anti-cyclonic structure above 50 hPa.The axis of the SAH center tends to be northwest slanting from lower levels to higher levels.Further analyses show that the geopotential height and temperature fields of the SAH have dramatic anomalies during El Ni?o years and La Ni?a years. Corresponding to the ENSO,the SAH is weaker(stronger)at the warm(cold)phase.