微波辐射计在重庆江北国际机场一次辐射雾天气中的应用研究

Research on the Application of Microwave Radiometer in Radiation Fog Weather at Chongqing Jiangbei International Airport

摘要: 利用重庆江北国际机场微波辐射计探测的温湿度数据、常规气象资料和机场逐小时观测资料，对2023年12月9日发生在重庆江北国际机场的一次辐射雾天气过程进行了分析研究。主要结论如下：在辐射雾发生前和消散时，跑道视程比能见度数值更高；微波辐射计探测的温度，能够大致反映出温度在辐射雾过程中的时空变化特征，对大雾的生消时间有一定指导意义；微波辐射计探测相对湿度，能够准确地反映出辐射雾在发生发展过程中湿度的变化特征以及空间上的分布特征；微波辐射计探测的温度和相对湿度在辐射雾发生前期的特征不明显，对辐射雾的预报提前量贡献有限。

Abstract: Using the temperature and humidity data detected by the microwave radiometer of Chongqing Jiangbei International Airport, conventional meteorological data and hourly airport observation data, an analysis and study was conducted on a radiation fog weather process that occurred at Chongqing Jiangbei International Airport on December 9, 2023. The main conclusions are as follows: before the radiation fog occurs and when it dissipates, the RVR is higher than the visibility value; the temperature detected by the microwave radiometer can roughly reflect the spatiotemporal change characteristics of the temperature during the radiation fog process, and has certain guiding significance for the occurrence and dissipation time of heavy fog; the microwave radiometer Detecting relative humidity can accurately reflect the changing characteristics and spatial distribution characteristics of humidity during the occurrence and development of radiation fog. The characteristics of temperature and relative humidity detected by microwave radiometers are not obvious in the early stages of radiation fog, and their contribution to the advance prediction of radiation fog is limited.