ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Characteristics of Sand and Dust Weather in China and Cause Analysis in the Spring of 2006
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Abstract:
The temporal and spatial distribution characteristics of sand and dust weather in China in the spring of 2006 are analyzed on the basis of the data fr om surface synoptic maps (8 times daily) and T213 model products. The results show that the intensity of sand and dust weather is strong in 2006. There are 17 major sand and dust weather processes, among them there are 5 severe sand and d ust storm processes, and the number of severe sand and dust storm processes in the spring of 2006 is the most since 2000. The severe sand and dust storm proces s from 9 to 11, April of 2006 ranks the third in influence area and intensity s ince 1990. The high frequency period tends to be longer and ends later. Further research shows: the temperature is higher and the precipitation is less in most parts of northern China in the spring of 2006, which causes the rapidly thawing of soil and much dry soil, respectively. They are favorable to the formation of sand and dust weather. The East Asia major trough is strong in the spring of 200 6 which causes the cold air to influence China more frequently and the intensity of cold air is strong; at the same time there are more Mongolian cyclones. The cooperation of cold air and Mongolian cyclone is the main reason for the strong sand and dust weather intensity in the spring of 2006.
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