RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2015, Vol. 24 >> Issue (10): 1799-1804.doi: 10.11870/cjlyzyyhj201510024

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INFLUENCE OF METEOROLOGICAL AND GEOGRAPHICAL FACTORS ON THE FOG IN THREE GORGES RESERVOIR OF THE YANGTZE RIVER

WANG Lin1, CHEN Zheng-hong1, DAI Juan1, TANG Yang2   

  1. 1. Hubei Meteorological Service Center, Wuhan 430074, China;
    2. Wuhan Regional Climate Center, Wuhan 430074, China
  • Received:2015-04-15 Revised:2015-07-20 Online:2015-10-20

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Abstract: In this paper, the influences on fog (visibility) of the Yangtze River Three Gorges Reservoir from meteorological and geographical factors were studied. We provided a scientific basis for monitoring and forecasting visibility through the quantitative analysis. This article selected 9 artificial fog observation stations and 12 visibility observation instrument data from Yichang to Yibin in 2011-2012. First, the discriminant analysis method is used to find the key meteorological influencing factors in different months. The path analysis method is further used for the direct and indirect influence on the fog. The results showed that the fog compliance rate is more than 50% judged by conventional meteorological elements. Wind speed, temperature and humidity were found to affect the fog level in late fall and winter. Humidity at 1000 hPa directly affected the maximum visibility value with a path coefficient of -0.5182. Geographic features of the mountain and the river drop-on played an indirect role in the breeding of fog.

Key words: Three Gorges Reservoir, fog situation, visibility, discriminant analysis, path analysis

CLC Number: 

  • P4
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