南沙区冷空气活动及其与降水关系的初步分析

利用南沙气象探测基地2008—2013年观测资料，分析了南沙冷空气活动及其与降水的关系。结果表明：南沙区冷空气活动以弱冷空气为主，冷空气强度越强，出现的概率越低，自2008年建站以来仅出现一次寒潮天气过程；冷空气活动期间低于7℃的气温往往是持续性补充的冷空气过程；影响南沙的冷空气路径绝大多数是中路，中路冷空气降温幅度也是最大的；南沙大多数冷空活动过程都伴随降水，量级以小到中雨为主。

A Preliminary Analysis of the Cold Air Activity and the Associated Precipitation in Nansha District,Guangzhou

Based on the observations of 2008 to 2013 from an observation base in the Nansha District, Guangzhou, analysis is made of the local cold air activity and the associated precipitation. The results are shown as follows. The cold air is mainly weak and the stronger the cold air, the lower the probability of its occurrence will be. There has been only one process During the cold air process, temperatures lower than of cold air surge since the setup of the base in 2008. 7 ℃ usually occur as persistent supplement to the pre- vious process. Most of the cold air affecting the district takes a central route, which is most remarkable for its amplitude of temperature fall. A majority of the cold air activity in Nansha is accompanied with precipita- tion, mainly at amplitudes from light to moderate.