TY  - JOUR
A1  - Cairo, Francesco
A1  - Buontempo, Carlo
A1  - MacKenzie, Robert A.
A1  - Schiller, Cornelius
A1  - Volk, C.-Michael
A1  - Adriani, Alberto
A1  - Mitev, Valentin
A1  - Matthey, Renaud
A1  - Di Donfrancesco, Guido
A1  - Oulanovsky, Alexey
A1  - Ravegnani, Fabrizio
A1  - Yushkov, Vladimir
A1  - Snels, Marcel
A1  - Cagnazzo, Chiara
A1  - Stefanutti, Leopoldo
T1  - Morphology of the tropopause layer and lower stratosphere above a tropical cyclone : a case study on cyclone Davina (1999)
T2  - Atmospheric chemistry and physics, 8.2008, S. 3411-3426
N2  - During the APE-THESEO mission in the Indian Ocean the Myasishchev Design Bureau stratospheric research aircraft M55 Geophysica performed a flight over and within the inner core region of tropical cyclone Davina. Measurements of total water, water vapour, temperature, aerosol backscattering, ozone and tracers were made and are discussed here in comparison with the averages of those quantities acquired during the campaign time frame. Temperature anomalies in the tropical tropopause layer (TTL), warmer than average in the lower part and colder than average in the upper TTL were observed. Ozone was strongly reduced compared to its average value, and thick cirrus decks were present up to the cold point, sometimes topped by a layer of very dry air. Evidence for meridional transport of trace gases in the stratosphere above the cyclone was observed and perturbed water distribution in the TTL was documented. The paper discuss possible processes of dehydration induced by the cirrus forming above the cyclone, and change in the chemical tracer and water distribution in the lower stratosphere 400–430 K due to meridional transport from the mid-latitudes and link with Davina. Moreover it compares the data prior and after the cyclone passage to discuss its actual impact on the atmospheric chemistry and thermodynamics.
Y1  - 2008
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/5866
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30-58050
SN  - 1680-7316
SN  - 1680-7324
N1  - © Author(s) 2008. This work is distributed under the Creative Commons Attribution 3.0 License.
VL  - 8
SP  - 3411
EP  - 3426
PB  - European Geosciences Union
CY  - Katlenburg-Lindau
ER  -