河西走廊东部近50年沙尘暴气候预测研究  

Study on Climatic Prediction of Sandstorm in East of Hexi Corridor

作　　者：李岩瑛[1] 俞亚勋[1] 罗晓玲 马兴祥 张爱萍 王汝忠 

机构地区：[1]中国气象局兰州干旱气象研究所甘肃省干旱气候变化与减灾重点实验室,甘肃兰州730020 [2]甘肃省武威市气象局,甘肃武威733000 [3]甘肃省民勤县气象站,甘肃民勤733300

出　　处：《高原气象》2004年第6期851-856,共6页Plateau Meteorology

基　　金：科技部社会公益研究专项项目(2000DIA10031)"西北干旱区沙尘暴预警;服务系统研究"02专题"西北干旱区沙尘暴气候背景与预测方法研究"资助

摘　　要：应用甘肃省河西走廊东部武威市5站(乌鞘岭、古浪、永昌、凉州区、民勤)近50年月、年气象资料和沙尘暴个例,详细分析了沙尘暴产生的气候背景和气候影响因子。在分析二十多种气象要素的基础上,做出沙尘暴不同时间、不同范围的日数和强度预报方程。研究表明:河西走廊东部的沙尘暴是武威市北部干旱气候、丰富的地表沙源与大风天气相互作用的结果;沙尘暴日数与该市中北部冬春季的气温、年降雨量和大风日数有关;沙尘暴强度与武威市前期的干旱、异常增温、强大风日数有关。Using the observed meteorological data, and typical sandstorm examples at five stations of Wuwei city in east of Hexi corridor in recent 50 years, the climatic background and influence factors of occurring sandstorm are analyzed detail. On the basis of analyzing more than twenties meteorological factors, the sandstorm forecasting equations of various strength, seasons and of areas are set up. The result shows that the sandstorm in east of Hexi corridor is caused by the interacting the drought climate, rich surface sands and strong wind weather in north of Wuwei city; sandstorm days are related to the temperature in winter and string, annually precipitation and strong wind days in mid-and-north- Wuwei city; the sandstorm strength is related to earlier drought, abnormal increasing temperature and strong wind days.

关 键 词：沙尘暴 大风 干旱指数 气候预测 

分 类 号：P445.4[天文地球—大气科学及气象学]