甘肃省高等级公路沿线大雾天气气候特征及其预报服务

The Climate Characteristics and its Forecast Service of Heavy Fog along the First-class Highway in Gansu Province

利用甘肃省高等级公路沿线20个气象站1971-2004年气候资料，分析了大雾天气的地域分布及其天气气候特征，得出甘肃省高等级公路沿线的大雾天气不仅具有明显的地域差异，而且具有明显的年际、季节、昼夜和局地性的变化特征，并在此基础上将不同路段的大雾天气划分为不同的预报服务期，为高等级公路沿线的大雾预报服务提供依据。

By using the data of 20 meteorological stations from 1971 to 2004, the region distribution and its climate characteristic of heavy fog along the first - class highway in Gansu province were analyzed. The results show that heavy fog occurring along the highway presents not only obvious regional difference, but marked yearly, seasonal, day and night, and local changing characteristics. So the different forecast service periods for heavy fog in different sections of the highway are put forward, so as to provide the basis for heavy fog forecast along the first -class highway in Gansu province.