Atmospheric Chemistry and Physics Discussions www.atmos-chem-phys-discuss.net 1680-7367 1680-7375 8 3 2008 10.5194/acpd-8-8327-2008 http://www.atmos-chem-phys-discuss.net/8/8327/2008/ http://www.atmos-chem-phys-discuss.net/8/8327/2008/acpd-8-8327-2008.html http://www.atmos-chem-phys-discuss.net/8/8327/2008/acpd-8-8327-2008.pdf 8327 8355 2008-05-06 Global temperature estimates in the troposphere and stratosphere: a validation study of COSMIC/FORMOSAT-3 measurements P. Kishore kishore1818@gmail.com S. P. Namboothiri J. H. Jiang V. Sivakumar K. Igarashi Dept. of Physics and Atmospheric Science, Dalhousie University, Halifax, Canada National Institute of Information and Communications Technology, Tokyo, Japan Jet Propulsion Laboratory, Pasadena, CA, USA National Laser Centre, CSIR, Pretoria, South Africa This paper mainly focuses on the validation of temperature estimates derived with the newly launched Constellation Observing System for Meteorology Ionosphere and Climate (COSMIC)/Formosa Satellite 3 (FORMOSAT-3) system. The analysis is based on the radio occultation (RO) data sample collected during the first year observation from April 2006 to April 2007. For the validation, we have used the operational stratospheric analyses (models) including the National Centers for Environmental Prediction-Reanalysis (NCEP-Reanalysis), the Japanese 25-year Reanalysis (JRA-25), and the United Kingdom Met Office (MetO) data sets. Comparisons done in different formats reveal excellent agreement between the COSMIC and model outputs. 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