Analysis on Changing Trend of Dust Weather in Bachu during 1961-2010
In this paper, the space-time distribution of gale and sand-dust weather, the changing characteristics and trends of sand-dust weather in Bachu were analyzed using linear trend method based on the data of gale and sand-dust weather days from Bachu weather station from 1961 to 2010, and the climatic reasons of daily variation of sand-dust weather were preliminarily studied. Main results are as follows. The sand-dust weather in this region mainly was float-dust, followed by raising sand andgale, and sand-dust storm was at least. The sand-dust weather in Bachu had the significant seasonal and annual changes. they appeared mostly from March to October, but in recent 50 years the days of gale and sand-dust reduced significantly. The sand-dust weather was closely related to the local gale and precipitation. There was the largest probability that when the northwest wind appeared there must be the sand-dust. The relationship between the sandstorm days and precipitation was also negative related and the sand-dust weather was less than normal when the year with more precipitation.
国家科技期刊平台
NSTL
万方数据
维普
