Fog in Taechon which is located in the west coast of Korea is advection fog made by marine atmosphere which is higher than the temperature of sea water and cooled while moving toward land with wind. Huwevcr. the annual mean number of tog days is 15.1, obviously Icss than those of Susan, Kunsan and similar coastal cities. The number of fog occurrence days in April and May increases twice as many as that of the months from November to March. From August it decreases to half as many as that of the months from April to May and then maintains such an extent. So the phenomenon is different from other areas. 1 he characteristics of fog in Taechon arc due to little difference between sea surface temperature and marine air temperature and geographical characteristics of Taechon area.

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