青藏高原温度场与贵州干旱的联系

应用ＳＶＤ等统计方法，探讨高原温度场与贵州春，夏旱的联系。分析表明，贵州春旱分布特征是以西部为中心。向东减少，夏旱以中，东部为中心，高原前一年３、９和１１月大规范温度异常分别对春、夏旱的分布预报有相当高的统计相关，可作为预报参考因子。贵州夏旱的高原异常增温，高原暖高压的辐散下沉气流和下坡地形等有关。

THE RELATIONSHIP BETWEEN THE QINGHAI- XIZANG PLATEAU TEMPERATURE FIELD AND DROUGHT IN GUIZHOU PROVINCE

The relationship between the Qinghai-Xizang Plateau temperature and the drought in Guizhou province during spring and summer are investigated using Singular Value Decomposition(SVD) of temporal covariance matrix It is shown that the spring drought center is located in the west of Guizhou province,the summer center is located in the east and middle of the Guizhou province When there is the large temperature anomalous area in the Qinghai-Xizang Plateau during March or September,it would forecast the spring drought area of Guizhou in next year The large area for temperature anomalies of the Plateau in November could forecast the summer drought area for Guizhou province in next year When the large temperature anomalies appear in Plateau during summer,the Plateau Warm High Pressure will cause the air divergence and sinking motion around the Plateau,this would be a reason of summer drought in Guizhou province