Study On The Meteorology Disaster Evolution Of Dust Storm In Xinjiang

The research of duststorm both our country and abrord, emphasizes on the aspects of the nature property in catastrophology particularly, however ignores its social property. There are so much built on the foundation of part region or separate weather station in the research of duststorm in Xinjiang, but less integrated research on the foundation of regionalism. Such status is obviously inconsistent with the real case management which makes districts based on the administrative units in current prevent and decrease disaster. In order to fit the practical need of region in disaster prevention and cure management, open the inner law of evolvement for weather disaster furtherly, which provides a scientific gist to the integrated layout of region prevent and decrease disaster, this paper mainly discussed the elementary evolvement characteristics of duststorm weather disaster in Xinjiang during 1960～2003.The 90 full recorded statistical datum that come from weather observation station shows that the frequency of duststorm weather takes on the downtrend in Xinjiang over the 40 years . This is in consistency with the trend of decrease of year/day average amounts of sandstorm weather in our country, which through prominent horizontal test. The coefficient of correlation of both is 0.884. But either of the maximum and minimum-year of duststorm frequency in Xinjiang is ahead of the whole nation. So, the variance of duststorm weather in Xinjiang has a definite typicality and warning.In the last 44 years, there are comparatively obvious three stages taken on the variance of disaster frequency for the great duststorm in Xinjiang. Such staggered variance is not present corresponding relation on the sandstorm weather variance between xinjiang and the whole country, but it present a closed relation on the factor of population, economy and entironment etc. on each stage.According to the extent of easy occur of duststorm weather, we can separate xinjiang into regions of duststorm disasters high easy occurred, moderated and low easy occurred. In terms of years of comprehensive easy occurrence analysis, the easy occured regions on and above moderated level are in Hetian, Kashi, Akesu and Bazhou; and the 4 regions which suffered from the most severe disasters are Tulufan, Hetian, Keshi, and Akesu. The frequency variance coefficient of sandstorm weather in the city of Urumqi is the biggest.