沙尘暴变化的时空特征——基于站日和站时数据的对比分析

Spatiotemporal characteristics of sand-dust storm change:a contract study based on station-day and station-hour data

利用"中国强沙尘暴序列及其支撑数据集",分别以"站日"和"站时"为计算单位,建立了中国50 a(1958-2007年)沙尘暴时间序列,分析了两个序列的关系,并比较了两者所反映出的沙尘暴时空变化特征。结果表明,站日和站时序列总体变化趋势比较一致,但细节有所差别,有时会影响某些结论。在反映沙尘暴的时间变化和空间分布时,两者存在明显的差异。

Base on observation data from meteorological stations, two time series of sand-dust storm （SDS） occur- ring in China during 1958 -2007 were established by using the station-day and station -hour as units, respective- ly. The relationships between the two time-series were investigated and the characteristics of the temporal and spa- tial variations of SDS were analyzed and compared. The results indicate that the overall variation trends of SDS sta- tion - day and station-hour are consistent, but there are differences in details which may influence some conclusions sometimes. The station-day differs from the station-hour obviously in reflection of the temporal and spatial variations of SDS.