【摘要】 利用30年的沙尘暴资料,采用经验正交分解等方法,分析了黑龙江省沙尘暴发生的规律。发现黑龙江省沙尘暴以西南部为多发中心;20世纪70年代发生最为频繁,而且1970-1975年为频繁发生的最高峰;近90%发生在春季。黑龙江省沙尘暴的范围以20世纪70年代为最大,90年代最小,但强度有增强的趋势;空间分布具有随年份全省偏多或偏少的一致性,南多北少或北多南少的趋势也比较明显。更多还原

【Abstract】 Based on the data of dust-storm for thirty years and the experienced orthogonal decomposition method, the occurring regularity of dust-storm in Heilongjiang Province was analyzed. Some essential understandings have been obtained as follows: the frequently occurring center of dust-storm is in southwest areas of Heilongjiang Province;1970′s displayed the most frequent dust-storm times and its peak was in 1970-1975; 90% of the dust-storm occurred in spring. It has been found that the biggest scope of dust-storm is in 1970′s and the smallest scope is in 1990′s, but the dust-storm intensity has been getting strongly. The spatial distribution of the dust-storm is similar for years with different amount and the amount of dust-storm in south areas is more than that in north areas, and it is right on the contrary.更多还原