塔里木盆地西部浮尘天气特征分析

 分析了1961—2003年塔里木盆地西部11个气象观测站的浮尘天气现象资料,给出了近43 a来塔里木盆地西部浮尘天气的时空分布特征及其变化特征,并分析了气候变化与浮尘的关系。结果表明:塔里木盆地西部浮尘发生频率相当高,时空分布不均;年际变化率较大,持续时间较长;年浮尘日数除了莎车在波动中缓慢增加外,其他各站均在波动中逐渐减少;浮尘与大风表现出明显的正相关,与年降水量和春季降水量表现出明显的负相关。

Analysis on Dust-floating Weather Features in the Western of Tarim Basin

We have analyzed the data of dust-floating weather phenomenon recorded by 11 meteorological stations during 1961-2003 in the western of Tarim basin,based on which we have got their spatial and temporal distribution characteristics and changing features in recently 43 years,and the relationship between the climate change and the dust-floating phenomena.Results show that the appearing frequency of dust-floating weather is much higher in the western of Tarim basin,and their spatial and temporal distribution is not even,their inter-year changing rate is bigger,and the lasting time of a dust-floating process is longer.The number of annual dust-floating days in the western of Tarim basin commonly decreased from 1961 to 2003 except for a gradually increasing at Shache station.Correlative analysis showed that there are clear positive correlation between dust-floating phenomenon and strong wind weather,and clear negative correlation between dust-floating phenomenon and precipitation of the whole year or spring.