新疆棉区浮尘灾害及其防御对策

Characters and Its Defense Measures of Floating Dust Zonal Disaster in Xinjiang Cotton Area

本文根据新疆棉区 30多个气象测站近 40 a浮尘日数资料 ,系统的研究了新疆棉区浮尘灾害区域特征和长期变化趋势及其防御对策。结果表明 ,1新疆棉区浮尘具有明显区域特征 ,其中以南疆棉区浮尘灾害最严重 ,区域年平均浮尘日数在 1 0 0 d以上 ;东疆棉区浮尘灾害次之 ,区域年平均浮尘日数在 50 d以上 ;北疆棉区浮尘灾害最少 ,年平均浮尘日数仅 1 0 d左右。 2新疆棉区年平均浮尘日数随年代增加的长期变化可分为三种类型 ,即递减型、递增型、抛物线型 。

According to the data of 30 meteorological stations near 40 years (1961~1998), number of days, systematic studies on the floating dust disaster characteristics in Xinjiang cotton area has been conducted. Results indicated that (1)Floating dust disaster have clearly zonal feature, with floating dust disaster most seriously in South Xinjiang, the average zonal annual floating dust days over 100 days. Second is the east Xinjiang, with the average zonal annual floating dust over 50 days. Cotton area in the north Xinjiang has few floating dust disaster,the mean annual floating dust days on only 10 days or so. (2)There are three patterns for the average days with floating dust increased with the time passed by in a long term changing trend: Lapsed pattern; Increased progressively pattern; and Parabolic pattern.