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@ARTICLE{Fierli:13903,
author = {Fierli, F. and Orlandi, E. and Law, K.S. and Cagnazzo, c.
and Borrmann, S. and Cairo, F. and Schiller, C. and
Ravegnani, F. and Volk, M.},
title = {{I}mpact of deep convection in the tropical tropopause
layer in {W}est {A}frica: in-situ observations and mesoscale
modelling},
journal = {Atmospheric chemistry and physics},
volume = {10},
issn = {1680-7316},
address = {Katlenburg-Lindau},
publisher = {EGU},
reportid = {PreJuSER-13903},
pages = {201 - 214},
year = {2011},
note = {The authors acknowledge the partial support of the EC
SCOUT-O3 Integrated Project (505390-GOCE-CT-2004). This work
was partly supported by AMMA project. Based on French
initiative, AMMA was built by an international scientific
group and is currently funded by a large number of agencies,
especially from France, UK, US and Africa. It has been the
beneficiary of a major financial contribution from the
European Community's Sixth Framework Research Programme. We
acknowledge the anonymous reviewers for their valuable
suggestions.},
abstract = {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
during August 2006 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 to have originated from convective cloud east of
the flights. 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 convection can influence
the composition of the upper troposphere above the level of
main outflow for an event of deep convection close to the
observation site. Model analysis also shows that 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.},
keywords = {J (WoSType)},
cin = {IEK-7},
ddc = {550},
cid = {I:(DE-Juel1)IEK-7-20101013},
pnm = {Atmosphäre und Klima},
pid = {G:(DE-Juel1)FUEK491},
shelfmark = {Meteorology $\&$ Atmospheric Sciences},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000286180200015},
url = {https://juser.fz-juelich.de/record/13903},
}