GPS radio occultation with CHAMP and SAC-C: global monitoring of thermal tropopause parameters

T. Schmidt, S. Heise, J. Wickert, G. Beyerle, C. Reigber
2005 Atmospheric Chemistry and Physics  
In this study the global lapse-rate tropopause (LRT) pressure, temperature, potential temperature, and sharpness are discussed based on Global Positioning System (GPS) radio occultations (RO) from the German CHAMP (CHAllenging Minisatellite Payload) and the U.S.-Argentinian SAC-C (Satelite de Aplicaciones Cientificas-C) satellite missions. Results with respect to seasonal variations are compared with operational radiosonde data and ECMWF (European Centre for Medium-Range Weather Forecast)
more » ... ional analyses. Results on the tropical quasi-biennial oscillation (QBO) are updated from an earlier study. CHAMP RO data are available continuously since May 2001 with on average 150 high resolution temperature profiles per day. SAC-C data are available for several periods in 2001 and 2002. In this study temperature data from CHAMP for the
doi:10.5194/acp-5-1473-2005 fatcat:leaiz3pgovbmdfm6siwdowkddq