FY-3气象卫星微波水汽三维可视化及其在强天气监测中的应用

3D visualization of humidity distribution from FY-3 MWHS and its application to severe weather monitoring

基于风云三号(FY-3)气象卫星上的可见光红外扫描辐射计(visible and infrared radiometer,VIRR)和微波湿度计(microwave humidity sounder,MWHS)数据,通过IDL语言开发设计了"FY-3微波水汽三维显示软件"。该软件可根据白天或夜晚监测时次的不同,自动生成由VIRR的3个通道(B6,B2,B1)合成且叠加4个高度(地表、850hPa,500 hPa和300 hPa)的微波水汽分布图(白天)或由VIRR热红外通道(B5)的云顶亮温图叠加微波水汽分布图(夜晚)。在热带气旋和梅雨监测预警中的应用表明:微波水汽三维可视化的结果综合了FY-3可见光红外数据在空间分辨率上和微波湿度数据在不同大气高度层垂直探测能力上各自的优势,其表达形式简洁、直观。该方法可以作为强天气监测预警的有效补充手段,具有一定的推广应用价值。

Using IDL and based on the VIRR and MWHS instruments on the FY -3 satellite, the authors developed a software called ＂ FY -3 microwave humidity 3D visualization display＂. According to different monitoring periods, the software can automatically generate a series of pictures composed by VIRR B6, B2, B1 and microwave humidity distribution at 4 different altitudes （ground, 850 hPa, 500 hPa and 300 hPa） from MWHS （day） , or can generate a series of pictures from black body temperture（TBB ） of VIRR B5 and microwave humidity distribution at 4 different altitudes from MWHS （night）. The utilization of this software in tropical cyclone ＇ SOALA＇ and rainfall monitoring shows that the 3D visualization, which combines and strengthens the advantages from VIRR and MWHS data on FY -3, is simple and easy to understand. The software can be a useful means in monitoring and warning of severe weathers such as tropical cyclone and rainfall.