中国区域降雪量和降雪频率对沙尘天气的影响作用分析

摘要/Abstract

摘要： 1970—2000年间气象台站降雪量和沙尘天气统计结果显示,在中国冬春季主要积雪覆盖区域,沙尘天气发生频次相对较低,各类沙尘天气基本发生在积雪覆盖率低、年降雪量少的区域。时间序列分析结果进一步显示,年降雪量和沙尘天气之间存在显著的负相关,降雪量的增多对沙尘天气的年发生次数具有明显的抑制作用。同时,年降雪频率也是影响沙尘天气爆发频次的重要因素之一。对于中国西北干旱少雪的地区,尤其体现在新疆北部地区,年降雪频率的增加能够显著地减少各类沙尘天气的发生次数。

关键词: 沙尘天气, 降雪量, 降雪频率, 地表覆盖

Abstract: The statistical results of meteorological data during 1970—2000 show that the sand-dust events frequency is relatively low in areas with snow cover in winter and spring in China, and the sand-dust events mainly occurs in areas with low snow coverage and snowfall amount. There is a significantly negative correlation between annual snowfall amount and sand-dust events frequency. Increase of annual snowfall amount decreases annual sand-dust events frequency obviously. Meanwhile, snowfall frequency is also an important influence factor on sand-dust events frequency. In arid regions of Northwestern China with less snowfall, especially in the northern part of Xinjiang, the frequency of sand-dust events reduces with increasing of snowfall frequency.

Key words: sand-dust events, snowfall, snow frequency, land cover

中图分类号:

P445.4

徐兴奎;王小桃;周广庆. 中国区域降雪量和降雪频率对沙尘天气的影响作用分析[J]. 中国沙漠, 2011, 31(5): 1293-1301.

XU Xing-kui;WANG Xiao-tao;ZHOU Guang-qing. Impact of Snowfall Amount and Snowfall Frequency on Sand-Dust Events in China[J]. JOURNAL OF DESERT RESEARCH, 2011, 31(5): 1293-1301.

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