Quality Control of Temperature and Humidity Profile Retrievals from Ground-based Microwave Radiometer

Ground-based microwave radiometer profiler(MWR) can continuously retrieve thermodynamic profiles of the atmosphere on a minute time scale.These profiles are important supplements to radiosonde observations.Since the presence of liquid water on the profiling radiometer,radio frequency interference and other events can cause errors,quality control procedures that can detect data-quality problems are of critical importance.QC procedures are proposed for ground-based MWR-retrieved atmospheric profiles of temperature and humidity using 10-year radiosonde soundings(January 2004 to December 2014) at Baoshan Station in Shanghai and observations from MP-3000 A MWR(January 2012 to May 2014) at Shanghai Expo Station.QC procedures include three types of checks;Climatological test,time consistency test,and vertical consistency test.Climatological check aims to verify if the values of instantaneous data are within climatology range limits.Thresholds are set based on the seasonally varying statistics of 10-year radiosonde s