"2006.10"云南嚴(yán)重秋季連陰雨水汽輸送特征和濕Q矢量分析

doi:10.3969/2012jms.00**

首頁 > 過刊瀏覽>2009年第卷第1期 >64-70. DOI:10.3969/2012jms.00**

"2006.10"云南嚴(yán)重秋季連陰雨水汽輸送特征和濕Q矢量分析
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                        10.3969/2012jms.00**
                    
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中圖分類號:P458.121
基金項目:云南省氣象局預(yù)報員專項課題?

Analysis on water vapour transporting features and wet Q vector of severe autumn lasting rainfall in Oct. 2006 in Yunnan province

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應(yīng)用常規(guī)氣象資料通過診斷分析和濕Q矢量分析,探討了2006年10月上旬云南嚴(yán)重連陰雨期間的水汽輸送特征,進(jìn)一步分析了期間持續(xù)性暴雨、大雨的落區(qū)分布,結(jié)果表明:連陰雨期間,ITCZ異?；钴S,先后有4個熱帶氣旋活動,200616號強臺風(fēng)"象神"橫穿中南半島進(jìn)入孟加拉灣,減弱之后再度發(fā)展成孟加拉灣低壓,由此提供了孟加拉灣水汽通道;ITCZ水汽通過副高外圍氣流向中南半島輸送,提供了第二條水汽通道,兩條水汽通道呈"人"字形,為連陰雨發(fā)生發(fā)展提供了有利的水汽條件.濕Q矢量輻合中心在對流層中低層700～640 hPa之間,700 hPa上濕Q矢量散度輻合區(qū)與暴雨區(qū)對應(yīng)較好;隨著濕Q矢量輻合區(qū)加強、移動和減弱,暴雨隨之發(fā)展、移動和結(jié)束.

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Observing data, diagnostic analysis and wet Ｑ vector analysis are used to research on the water vapour transporting features during the severe lasting rainfall period of Yunnan Province in first third of October, 2006. Furthermore, the distribution of precipitation area of lasting storm rainfall and heavy rainfall was analyzed. Result indicated that, during the lasting precipitation period, ITCZ was abnormally active, and there were 4 tropical cyclone activities one after another. The 200616 severe typhoon “Xiangshen” passed across the China-South Asia Peninsula and got into the Bay of Bengal. Then the typhoon weakened and developed to Bengal depression again, which provided the water vapour channel of Bay of Bengal. The transporting of ITCZ water vapour to China-South Africa Peninsula through the flow around the sub-tropical high provided the second water vapour channel. The two water vapour channels formed the shape of “人” and provided beneficial water vapour condition for the happening of lasting precipitation. Wet Ｑ vector convergence center located at the height of 700～640 hPa in the middle of troposphere. And at the level of 700 hPa, wet Ｑ diversity convergence area corresponded well to storm rainfall area. With the strengthening,moving and weakening of wet Ｑ vector convergence area, storm rainfall developed,moved and stopped accordingly.

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魯亞斌,普貴明,趙寧坤,李屏,郭榮芬."2006.10"云南嚴(yán)重秋季連陰雨水汽輸送特征和濕Q矢量分析.氣象科學(xué),2009,(1):64-70 Lu Yabin, Pu Guiming, Zhao Ningkun, Li Ping, Guo Rongfen. Analysis on water vapour transporting features and wet Q vector of severe autumn lasting rainfall in Oct. 2006 in Yunnan province. Journal of the Meteorological Sciences,2009,(1):64-70

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