Abstract:The frequency of fog occurrence and fog water chemical characteristics are analyzed based on the surface observation data at Zhanjiang Station from 1951 to 2010 and the sea fog observation data on Donghai Island in Zhanjiang from 15 March 2010 to 20 April 2010. Result shows that the sea fogs in Zhanjiang are acidic, with pH in the range of 4.80~6.05. The electrical conductivity of the fog water during the formation stage is higher than that during the duration stage, indicating that a large amount of pollution dissolves in the fog water when fog forms. The non-linear fitting result of the relationship between the electrical conductivity and pH shows that the correlation coefficient is 0.61, indicating a certain connection between these two properties. Compared with the fog water in the other areas in China, the ionic concentrations of Zhanjiang fog are higher. Cl- and NO3- are the dominant anions, especially Cl- reaching 13000 μmol /L, but SO42- is lower; with regard to the cation, Na+ dominates. The electrical conductivity is higher than those in the other areas. The higher concentrations of Ca2+ and Mg2+ are dominantly affected by near-surface soil dust (mainly carbonate of calcium and iron). The ionic concentrations are higher during the early stage of fog and decrease during the fog development. The ionic concentrations are related to the fog types.
徐峰, 牛生杰, 张羽, 岳岩裕, 赵丽娟, 蔡寿强. 湛江东海岛春季海雾雾水化学特性分析[J]. 中国环境科学, 2011, 31(3): 353-360.
XU Feng, NIU Sheng-Jie, ZHANG Yu, YUE Yan-Yu, ZHAO Li-Juan, CAI Shou-Qiang. Analyses on chemical characteristic of spring sea fog water on Donghai Island in Zhanjiang, China. CHINA ENVIRONMENTAL SCIENCECE, 2011, 31(3): 353-360.