茂名地区海雾的微物理结构特征

2007年3月16日至4月29日期间,在广东茂名海洋气象科学实验基地对海雾进行了连续观测,共取得51个雾滴谱样本,在此基础上分析了茂名地区海雾的微物理结构特征。观测分析表明:茂名地区海雾的雾滴谱分布符合Junge分布,平均数密度为57.1个/cm3,平均含水量为0.018 3 g/m3,算术平均直径为4.7μm,算术峰值直径为2.9μm。文中还比较了雾和轻雾情况下雾滴谱分布的不同特征,分析了能见度与含水量之间的关系。

Microphysical characteristics of the sea fog in Maoming area

Based on 51 collected samples, the microphysical characteristics of sea fog from 16 March to 29 April 2007 was investigated in Marine Meteorology Science Experiment Center in Maoming, Guangdong Province.It is indicated that the average droplet size distribution is similar to Junge distribution, the average concentration is 57.1 drops·cm-3, the average liquid water content is 0.018 3 g·m-3.The average drop diameter is 4.7μm, and the average peak drop diameter is 2.9μm.Different microphysical characteristics between stable fog and mist have also been compared.Finally, an empirical relationship between liquid water content and horizontal atmospheric visibility is also presented.