冬春季积雪与沙尘天气发生日数关系的探讨——以内蒙古中部地区为例

 利用地面气象观测数据,以日积雪深度≥1.0 cm日数和沙尘天气（包括浮尘、扬沙及沙尘暴）发生日数为指标,从不同的空间尺度,分析了内蒙古中部地区冬季与初春积雪日数与沙尘天气发生日数的关系。研究结果表明,在内蒙古中部地区,冬季与初春沙尘天气发生日数与积雪日数之间均呈现负的相关关系,这种相关关系在不同区域和不同季节有所差异,冬季积雪日数与沙尘天气发生日数之间的负相关较初春积雪日数与沙尘天气发生日数之间的负相关更为显著;在中温带温凉半干旱气候区初春积雪日数与沙尘天气发生日数间的负相关较其他两个气候区更为显著。

Relationship between Snow Cover and Sand-dust Weather Days in Early Summer and Winter——Taking Central Inner Mongolia as Example

Based on meteorological observation data from earth surface, an analysis on the relationship between sand-dust weather days and days of snow cover≥1.0cm in early spring and winter in central Inner Mongolia autonomous region is performed against different spatial levels. The result shows that there is a negative interrelation between sand-dust weather days and snow cover days, which varies due to the difference of climate feature and the change of season. The negative interrelation between sand-dust weather days and snow cover days in winter is more marked than in early spring. The negative interrelation in cool temperate semi-arid climate region in early spring is more significant than in other regions.