大连沙尘天气及预报模型分析  

Analysis on Characteristic and Forecast Model of Sand-dusts Afecting Dalian

作　　者：宋煜[1] 曲晓波[2] 隋洪起[1] 黄振[1] 

机构地区：[1]辽宁省大连市气象局,116001 [2]国家气象中心

出　　处：《气象》2008年第11期54-61,共8页Meteorological Monthly

摘　　要：通过对位于东北亚沙尘暴天气下游的大连近7年的沙尘天气统计分析,以及应用天气学方法进行预报模型分析,揭示出大连地区沙尘的主要特征和预报着眼点。大连沙尘天气主要出现在春季,变化趋势同全国基本一致;沙尘天气的源地有4个,有三条影响路径。沙尘影响时,平均相对湿度都较低,以西北风为主。西北路径是影响大连地区产生沙尘天气最多的路径。在北路系统影响下,有三种天气类型;西路系统和西北路系统也分别有三种和四种天气类型。大连的沙尘天气预报着眼点首先要关注其上游的起沙情况,然后结合三路影响系统的预报模型进行分析;三路影响系统有不同的起沙关注区和不同的天气系统位置和移动方向。Based on meteorological observational data of seven years and the pattern of sand-dust weather process affecting Dalian, the characteristics and forecast model of sand-dust invading Dalian were analyzed. The results show that sand-dusts in Dalian occurred frequently in spring, similar to other sites of China. There were four source locations and three transport paths of sanddust. The mean relative humidity was very low and the wind direction was northwest mainly in sand-dust weather. Most of the sand-dusts move along the northwest paths invading Dalian. The north path corresponds to three weather patterns, the west path corresponds to other three systems and the northwest path to four systems. Theforecast of sand-dust should pay more attention to the sand-rising in upstream region, then combine with analyzing the forecast modelof three transportation paths.

关 键 词：沙尘 天气特征 影响路径 预报模型 

分 类 号：P458.121[天文地球—大气科学及气象学] P445.4