准葛尔盆地南缘沙尘暴、大风气候特征分析

The Analysis of a Gale and Sandstorm Weather in Junggar Basin of Northern in Xingjiang

选取1953～2006年准葛尔盆地南缘石河子垦区3个地面观测站的资料，对比分析了沙尘暴、大风的时空分布特征，探讨沙尘暴和大风之间的关系及沙尘暴发生时的最多风向和最小风速指标。结果表明：准葛尔盆地南缘石河子垦区沙尘暴与大风的地理分布刚好相反，沙尘暴多的地方大风较少，北部莫索湾沙漠边缘一带为沙尘暴高发区；但有着基本一致的气候变化趋势。沙尘暴发生时的最多风向为西北风，引起沙尘暴的最小风速指标大于10m／s。

With observational data of 1953 -2006 from 3 meteorological stations in Shihezi city in Junggar Basin of northern Xinjiang, the spatial and temporal characteristics of sandstorms and strong winds, and the contribution of strong winds to the occurrence of sandstorms were analyzed. Moreover, the dominant wind direction and minimum wind speeds during sandstorm periods were discussed. The research showed that although possessing similar climatic trends, sandstorms and strong winds in Shihezi city in Junggar Basin had opposite geographical distributions. Places with more sandstorms had fewer strong winds. The edge of desert which is in the northern of Mosouwan was the high incidence area of sandstorms. The dominant wind directions were northwest that introduced the sandstorms. The minimum wind speed in the sandstorms was over 10m Ps .