宁夏高、低温天气及环流特征的初步分析

通过宁夏24个测站1960—2000年逐日最高、最低气温资料，对宁夏40年来高、低温天气的时空变化特征进行了分析；并利用NCEP／NCAR(1979—1999年)资料对宁夏高、低温天气典型偏多、少年的大气环流异常特征进行了诊断分析。结果表明：宁夏高、低温天气偏多、少年间极涡的强度及位置和大陆高压、副热带高压的强度和位置具有明显差异，同时，高、低温天气偏多、少年份中，温度场也有相反的分布。

Analysis on High and Low Temperature Weather and General Atmospheric Circulation in Ningxia

The temporal\|spatial characteristics of high and low temperature weather were analyzed by using the 40\|year daily data of maximum and minimum temperatures at 24 weather stations of Ningxia. At same time, a diagnostic analysis on the abnormal characteristic of atmospheric circulation of more or less years in high and low temperature weather were carried out using the data of NCEP/NCAR during 1979\_1999. The result showed that the intensity and position of polar vortex, the intensity and position of continental and subtropical highs were obviously different from each other during the more or less years of high and low temperature weather in Ningxia. On the contrary, the temperature fields show an opposite distribution.