我国北方春季沙尘暴的异常及其对冬季青藏高原地面感热的响应

本文选用中国178个常规气象观测站建站～2000年历年春季沙尘暴日数资料,分析了近50年来中国北方春季沙尘暴的气候特征。在此基础上进一步揭示了我国北方沙尘暴的形成、发展以及造成的危害。结果表明我国北方春季沙尘暴存在东西反位相差异,近50年来,春季沙尘暴日数总体趋势在减少,但20世纪末又有明显的回升趋势。这不仅与影响我国北方的冷空气路径有关,还与青藏高原冬季地面感热的异常密切相关。

The Abnormal Sand Dust Storm in Northern China in Spring and Its Response to The Sensible Heat of Surface in Qinghai-Xizang Plateau in Winter

conventional meteorology observation stations' data abour the annual sand-dust storm days from the beginning to 2000 were applied to analyze the climatic characteristics of sand-dust storm in northern China in Spring and its response to the sensible heat of surface in winter in Qinghai-Xizang plateau in recent 50 years. the formation , the development and the harm of the sand-dust storm in northern China were probed. The result indicated: that the sand-dust storm occurrences were different between the east and west of northern China,and the sand storm frequency was decreasing in recent 50 years ,but at the end of 20 century the sand-dust storm days have an obvious hoist, all that is connected with not only the path of cold air but also the sensible heat of surface in Qinghai-Xizang plateau.