A long period (2001-2007) wave activity global analysis in the troposphere-stratosphere system, from GPS RO CHAMP temperature data.

A. DE LA TORRE (1), T. SCHMIDT (2) AND J. WICKERT (2)

Viena, Austria

Congreso; EGU 2007; 2007

From a long period (2001-2007) GPS radio occultation temperature data obtained with the CHAMP Low Earth Orbit satellite, the global wave energy derived for apparent vertical wavelengths with different upper cutoffs beyond the 10 km limit recently considered in the stratosphere is analyzed. In particular, it is expected that long vertical wavelengths belonging to mountain and planetary waves may be now better included. The wave potential energy is calculated around the tropopause/s after converting T profiles to potential temperature. This allows an integrated analysis of the troposphere-stratosphere system. Taking into account basic restrictions of the RO method itself, as refraction due to background wind and wavelengths distortion due to the not vertically directed line of tangent points (LTP), global and local features as a function of latitude, longitude, height and time are presented. Previous conclusions by other authors and by ourselves are discussed.