Muhammad Muslehuddin, Hazrat Mir, Nadeem Faisal


This study examines the data for normal period (1961-1990) over five month period (Nov-March), of the following years for the 56 stations of Pakistan. 1997-1998 1998-1999 1999-2000 However great concentration has been made on the 24 stations most of them are located in the Punjab, where the fog formation is very common especially in the recent years, The data of monthly number of fog days (Sky not seen) of the station for above period was initially examined to find out any significant change as compared to the normal frequency of fog days. Secondly various meteorological parameters were examined and following parameters were identified having significant role in the formation of fog. Mean Monthly relative humidity in % at 0000 and 0300 U.T.C. Mean Monthly dry bulb temperature in C° at 0000 and 0300 U.T.C. Mean Monthly Wind speed in Knots at 0000 and 0300 U.T.C. Lastly synoptic pattern associated with extensive fog phenomenon were analysed and studied on the synoptic charts prepared at Pakistan Meteorological Department forecasting office for the Month of November to March in the years 1997 to 2000.

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