| 民勤沙区50多年来沙尘天气特征及其影响因素 |
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| 引用本文： | 韩福贵,赵明,常兆丰,韩生慧,仲生年,郭树江.民勤沙区50多年来沙尘天气特征及其影响因素[J].干旱区研究,2009,26(6). |
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| 作者姓名： | 韩福贵 赵明 常兆丰 韩生慧 仲生年 郭树江 |
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| 作者单位： | 甘肃省治沙研究所民勤荒漠草地生态系统国家野外科学观测研究站,甘肃省荒漠化防治重点实验室,甘肃 武威 733000 |
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| 摘 要： | 沙尘天气是民勤沙区主要的灾害性天气之一,利用1953-2006年民勤沙区气象站的沙尘暴实测资料,系统地分析了50多年来的气温、降水、平均风速、沙尘暴的年、月、季节变化特征、民勤沙区气候变化趋势、沙尘暴与大风、气温、降水之间的相关关系.结果表明:民勤沙区沙尘暴的日数20世纪50年代开始最高,60年代缓慢减少,70年代又有回升的趋势,到80-90年代在波动中逐渐减少,但波动很大,并出现2个高峰值(1988年、1993年),2000-2006年最少.从沙尘暴发生机理和形成机制来看,今后应在民勤沙区绿洲边缘,沿现代尘暴路径布置更多的监测点,以便进一步研究风速对沙尘释放、输送和搬运等过程的机理.
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| 关 键 词： | 民勤 沙尘天气 年际变化 气候变化 环境特征 |
Analysis on dust Weather and Its Affecting Factors in Minqin Sandy Area in Recent 50 Years |
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| HAN Fu-gui,ZHAO Ming,CHANG Zhao-fen,HAN Sheng-hui,ZHONG Sheng-nian,GUO Shu-jiang.Analysis on dust Weather and Its Affecting Factors in Minqin Sandy Area in Recent 50 Years[J].Arid Zone Research,2009,26(6). |
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| Authors: | HAN Fu-gui ZHAO Ming CHANG Zhao-fen HAN Sheng-hui ZHONG Sheng-nian GUO Shu-jiang |
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| Abstract: | The Minqin sandy area is one of the sand-dust sources of occurring sandstorm,and also a place with the most serious dust weather occurrence in China.So sandstorm weather is one of the main natural hazards in this county.In recent years,the occurring frequency of dust weather is increased,and its impact extent is enlarged.This paper analyzes the changes of temperature,precipitation,average wind speed and annum,seasonal and monthly occurrence of dust weather as well as climate change and the relationships between dust events and gale,temperature and precipitation in Minqin for the period 1953-2006.The results show that the days of occurring dust events were the most in the 1950s,reduced slowly in the 1960s,increased in the 1970s,decreased in a fluctuation way during the period from the 1980s to the 1990s.Two high peaks of occurring dust wather occurred in 1988 and 1993,and the days of occurring dust events were the least during the period from 2000 to 2006.Based on the occurrence and formation mechanism of dust waether,it is suggested to increase the sites for sandstorm monitoring a10ng modern sandstorm moving route in the marginal zone of the Minqin Oasis so as to lucubrate the mechanism of wind speed on sand-dust release and transportation. |
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| Keywords: | Minqin sandy area dust weather annual variation climatic factor environmental characteristic |
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