河南省沙尘暴时空分布特征及影响因子分析

对河南省沙尘暴时空分布特征及影响因子分析发现：河南省沙尘暴在东部平原地区发生频率高于西部山区，在驻马店以北，年沙尘暴日数为1的等值线基本上与地势海拔100m地形等高线相吻合；沙尘暴的多发地区，沙尘暴日数年际变化在多数年份较为剧烈；河南省沙尘暴沙源并非全部来自省外，省内下垫面沙尘对沙尘暴的发生起了一定的促进作用；沙尘暴的发生与降水量关系极不明确，但在部分年份与月最长无降水日数和日照时数之间存在着一定的对应关系。

The Analysis of The Temporal and Spatial Distribution Characteristics of Sand Storm and Its Climate Factors

In this paper we analyzed the characteristics of temporal and spatial distributions of sand storm and its meteorological factors in Henan province. The results show that the frequency of sand storms is higher in the plain region of eastern Henan than that in the mountain area of western Henan, and in the region northern to Zhumadian, the isoline of annual mean number of sand storm days which is equivalent to 1 is approximately same to the sea level elevation isohypse of 100m. In the areas where sand storms occur frequently, the inter annual change of sand storms is usually great in most years. The sand and dust that lie in Henan province play an important role in the occurrences of the sand storms in Henan province. Sand storms are related with various meteorological factors.