吐鲁番盆地近五年沙尘天气特征分析

Analysis on the Characteristics of Dust Weather in Recent Five Years in the Turpan Basin

摘要: 本文利用吐鲁番市国家站2016~2020年的地面观测资料，应用数理统计方法分析高昌区、鄯善县、托克逊县3个国家站沙尘日数与气象要素的关系及变化特征，并应用高空环流图分析出现沙尘天气时对应的大气环流形势特征。结果表明：吐鲁番市沙尘天气具有白天出现频次高于夜间、春季出现频次高于夏秋冬三季等变化特征，沙尘日数与大风日数、平均风速及平均气温有显著正相关性，出现沙尘天气时的环流形势可分为6种类型。

Abstract: Using ground-based observations from the Turpan national station for the period 2016~2020, the relationship between the number of dust days and meteorological factors in Gaochang District, Piqan County and Toksun County was analyzed by using mathematical statistical methods, the characteristics of the atmospheric circulation pattern corresponding to the occurrence of sand-dust weather are analyzed by using the high-altitude circulation diagram. The results show that the occurrence frequency of dust storms in Turpan during the day is higher than that at night, and the occurrence frequency in spring is higher than that in summer, autumn and winter, there is a significant positive correlation between the number of dust days and the number of gale days, average wind speed and average air temperature. The circulation patterns associated with dust weather can be divided into 6 types.