Ground-based microwave radiometry to determine stratospheric and mesospheric ozone profiles |
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| Institution: | 1. School of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou, Jiangsu Province 221116, China;2. School of Computing and Engineering, University of Derby, Derby DE22 1GB, UK;3. Artificial Intelligence Research Institute, China University of Mining and Technology, Xuzhou, Jiangsu Province 221116, China;1. Satellite Environment Center, Ministry of Ecology and Environment/State Environmental Protection Key Laboratory of Satellite Remote Sensing, Beijing 100094, China;2. College of Resources and Environment, Henan University of Economics and Law, Zhengzhou 450000, China;3. School of Geography and Information Engineering, China University of Geosciences, Wuhan 430000, China;4. Guangxi Eco-Environmental Monitoring Centre, Nanning 530028, China;5. School of Civil Engineering, Sun Yat-Sen University, Zhuhai 519082, Guangdong, China;6. Center of Water Resources and Environment, Sun Yat-sen University, Guangzhou 510275, China;7. Faculty of Geographical Science, Beijing Normal University, Beijing, 100875, China;1. Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, VA, USA 23529.;2. Department of Chemistry, University of Waterloo, Waterloo, ON Canada N2L 3G1. |
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| Abstract: | From April 1984 to April 1985 a microwave radiometer was operated at Bern (Switzerland, latitude 47°N) measuring the thermal emission of the rotational ozone transition at 142.2 GHz to determine stratospheric and mesospheric ozone abundances in the range ~25–~75 km altitude. From a total of 334 retrieved day-time profiles, monthly mean ozone partial pressures for Umkehr layers 6–10 were calculated. On this basis ozone variations compare favorably with Umkehr data from the nearby Arosa (Switzerland, 150 km east of Bern) station and with a monthly zonal mean model compiled from satellite data by Keating and Young. From the microwave data an annual mean ozone distribution was determined. The method retrieves somewhat larger ozone volume mixing ratios between 25 and 30 km altitude. For the rest of the measurement range of the sensor there is good agreement with 20 year annual mean ozone values from Arosa, with the Krueger and Minzner profile and with the respective annual mean data given by Keating and Young. The microwave ozone sensor can easily be adapted for operational use, where it can supplement and expand the measurement range of the traditional Umkehr network. |
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