- We present the analysis of the impact of convection on the composition of the tropical tropopause layer region (TTL) in West-Africa during the AMMA-SCOUT campaign. Geophysica M55 aircraft observations of water vapor, ozone, aerosol and CO2 show perturbed values at altitudes ranging from 14 km to 17 km (above the main convective outflow) and satellite data indicates that air detrainment is likely originated from convective cloud east of the flight. Simulations of the BOLAM mesoscale model, nudged with infrared radiance temperatures, are used to estimate the convective impact in the upper troposphere and to assess the fraction of air processed by convection. The analysis shows that BOLAM correctly reproduces the location and the vertical structure of convective outflow. Model-aided analysis indicates that in the outflow of a large convective system, deep convection can largely modify chemical composition and aerosol distribution up to the tropical tropopause. Model analysis also shows that, on average, deep convection occurring in the entire Sahelian transect (up to 2000 km E of the measurement area) has a non negligible role in determining TTL composition.
MetadatenAuthor: | Federico Fierli, Emiliano Orlandi, Kathy S. Law, Chiara Cagnazzo, Francesco Cairo, Cornelius SchillerGND, Stephan BorrmannORCiDGND, Guido Di Donfrancesco, Fabrizio RavegnaniORCiD, C.-Michael Volk |
---|
URN: | urn:nbn:de:hebis:30:3-292557 |
---|
URL: | http://www.atmos-chem-phys-discuss.net/10/4927/2010/ |
---|
DOI: | https://doi.org/10.5194/acpd-10-4927-2010 |
---|
ISSN: | 1680-7367 |
---|
ISSN: | 1680-7375 |
---|
Parent Title (English): | Atmospheric chemistry and physics / Discussions, 10.2010, S. 4927-4961 |
---|
Publisher: | European Geosciences Union |
---|
Place of publication: | Katlenburg-Lindau |
---|
Document Type: | Article |
---|
Language: | English |
---|
Date of Publication (online): | 2010/02/18 |
---|
Date of first Publication: | 2010/02/18 |
---|
Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
---|
Release Date: | 2013/03/20 |
---|
Volume: | 10 |
---|
Page Number: | 35 |
---|
First Page: | 4927 |
---|
Last Page: | 4961 |
---|
Note: | © Author(s) 2010. This work is distributed under the Creative Commons Attribution 3.0 License. |
---|
HeBIS-PPN: | 335507492 |
---|
Institutes: | Geowissenschaften / Geographie / Geowissenschaften |
---|
Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 55 Geowissenschaften, Geologie / 550 Geowissenschaften |
---|
Sammlungen: | Universitätspublikationen |
---|
Licence (German): | Creative Commons - Namensnennung 3.0 |
---|