Research on Yunnan Aviation Meteorological Safety Risk Level Evaluation

This study conducts a comprehensive risk assessment of meteorological safety for aviation operations in Yunnan Province.Leveraging meticulously curated observational data from 124 county-level meteorological stations across the province， encompassing measurements of low clouds and reduced visibility， rainfall， strong winds， icing， and thunderstorms， the research delves into the primary meteorological elements influencing aviation safety during takeoff and landing in various regions of Yunnan.Employing a fuzzy comprehensive evaluation method and Arcgis spatial analysis tools， a zoning map is developed to delineate the levels of aviation weather safety risk in Yunnan Province.The analysis yields the following significant findings： （1） Regionally， the primary meteorological factors influencing aviation safety in Yunnan encompass icing in the northwest， rainfall and strong winds in the west， low clouds and reduced visibility， as well as rainfall and thunderstorms in the southwest.Furthermore， prevalent meteorological challenges include low clouds and reduced visibility along with rainfall in the southeast， while rainfall predominates in the southern part of the east.Overall conditions demonstrate relative favorability without significant influencing factors observed in other parts of northeastern， central and most of eastern Yunnan.（2） When assessing aviation operation meteorological safety days and dangerous days across different regions within Yunnan province， it is evident that meteorological conditions for aviation operations generally exhibit favorability across most areas.Relatively poorer meteorological conditions are primarily concentrated in specific areas such as the northwest， the southern edge of the west， the southwestern edge of the southwest， the southern edge of the southeast， the southern part of the east etc.（3） In terms of comprehensive assessment regarding meteorological risk associated with aviation operations within various regions across Yunnan province， a majority fall into safe or very safe categories.The relatively dangerous or very dangerous grades are only found to be distributed within specific areas such as central Diqing Prefecture in the northwest， the southwestern part of Lincang City in the southwest， Xishuangbanna Dai Autonomous Prefecture etc.Overall assessment indicates a favorable level for comprehensive meteorological risk associated with aviation operations throughout Yunnan province.