%0 Journal Article
%A Cairo, F.
%A Buontempo, C.
%A MacKenzie, A. R.
%A Schiller, C.
%A Volk, M.
%A Adriani, A.
%A Mitev, V.
%A Matthey, R.
%A Di Donfrancesco, G.
%A Qulanovsky, A.
%A Ravegnani, F.
%A Rudakov, S.
%A Yushkov, V.
%A Snels, M.
%A Cagnazzo, C.
%A Stefanutti, L.
%T Morphology of the tropopause layer and lower stratosphere above a tropical cyclone: A case study on cyclone Davina (1999)
%J Atmospheric chemistry and physics
%V 8
%@ 1680-7316
%C Katlenburg-Lindau
%I EGU
%M PreJuSER-1470
%P 3411 - 3426
%D 2008
%Z The APE-THESEO project was funded by the European Commission under the contract ENVSCY97-0533. by the Italian Space Agency (ASI), by the European Science Foundation and by the German Ministry of Science and Education (BMBF). all of whom gratefully acknowledged. Help in-kind was provided by the UK Meteorological Office and the Directorate of Civil Aviation of the Seychelles.A. R. MacKenzie gratefully acknowledges NERC support under contracts GST/02/2210 and NER/T/S/00977.This work also informs Activity 2 of the SCOUT-O3 Integrated Project of the European Commission (contract 505390-GOCE-CT-2004) as part of that project's data mining and exploitation of existing data.ECMWF ERA-40 data used in this study have been obtained from the ECMWF data server.
%X 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.
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000257516800003
%R 10.5194/acp-8-3411-2008
%U https://juser.fz-juelich.de/record/1470