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对2010年3月广东湛江东海岛海雾外场观测试验中获得的雾水样本和气溶胶资料进行分析,研究了海雾中气溶胶和雾水组分的特性以及沙尘过程对其演变的影响。结果表明:东海岛的气溶胶数浓度比内陆城市低1个数量级,环境相对清洁,其早晚的峰值明显,午后存在一个低值。气溶胶谱呈单峰分布,峰值半径为0.02~0.1μm。雾日的气溶胶数浓度明显低于非雾日,最大值分别集中在0.05~0.1μm和0.1~0.5μm。雾过程开始后气溶胶数密度下降,尤其是小粒子端数密度减少显著;雾过程结束后气溶胶数密度会恢复到正常数值。受沙尘影响的过程中雾水中Ca2+和Mg2+明显增加,气溶胶粒子谱拓宽,直径大于1μm的气溶胶数密度高于其他雾过程;沙尘过境后气溶胶谱变窄,数密度显著减少,离子浓度较低。
The fog water samples and aerosol data obtained from the observation experiment of the sea fog in the east island of Zhanjiang, Guangdong Province in March 2010 were analyzed. The characteristics of the aerosol and fog water components in the sea fog and the influence of sand dust process on their evolution were studied. The results show that the concentration of aerosol in the East Island is one order of magnitude lower than that in the inland cities, and the environment is relatively clean. The morning and evening peak is obvious, and there is a low value in the afternoon. Aerosol spectrum showed a single peak distribution, the peak radius of 0.02 ~ 0.1μm. The fog aerosol number concentration was significantly lower than the non-fog day, the maximum concentration of 0.05 ~ 0.1μm and 0.1 ~ 0.5μm. After the fogging process, the number density of aerosols decreased, especially the number density of small particles decreased significantly. After the fogging process, the number density of aerosols returned to normal values. In the process of dust-affected, Ca2 + and Mg2 + in fog water increased obviously, the aerosol particle spectrum broadened, the aerosol number density greater than 1μm in diameter was higher than other fog processes; the aerosol spectrum narrowed and the number density decreased significantly after dust transit , The ion concentration is lower.