Analysis on a Radiation Fog Event at Miling Airport in Nyingchi
Wang Liying
Kong Weiwei
Abstract：In this paper,the large-scale circulation background,meteorological elements and physical quantity fields of a radiation fog event at Milin Airport,Nyingchi were analyzed statistically by using ground observation and radiosonde data.The results showed that:(1)the upper-mid-level high-pressure ridge and weak-pressure ground trough were background circulation conditions forthe formation of radiation fog at Nyingchi Airport.(2)The radia-tion fog exhibited obvious diurnal change characteristics,whichunderwent three stages-formation,maintenance and dissipation,with the maintenance stage lasting significantly longer.(3)At 10:20,there appeared a notable breakpoint in the rising dominant trend of visibility.During the radiation fog,there were divergent flows and down-drafts in the mid-low troposphere of the airport.(4)The dominant visibility was significantly correlated with air tem-perature,temperature dew point difference,wind speed and relative humidity.When the air temperature was greater than 2.5℃,the temperature dew point difference exceeded 1℃,the wind speed surpassed 3m/s,and the relative hu-midity was less than 90%,the radiation fog began to dissipate.
Keywords：Radiation fogCorrelation coefficientMann-Kendall mutation testDiurnal change characteristicsMi-lin AirportNyingchi
Publication Date：2025-06-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 27-31,42 )