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Advanced exploitation of ground-based Fourier transform infrared observations for tropospheric studies over Europe: achievements of the UFTIR project
De Mazière, Martine; Vigouroux, Corinne; Blumenstock, Thomas et al.
2006In Geophysical Research Abstracts, 8
 

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Keywords :
FTIR remote sensing; atmospheric composition and trends; troposphere
Abstract :
[en] Solar absorption measurements using Fourier transform infrared (FTIR) spectrometry carry information about the atmospheric abundances of many constituents, including information about their vertical distributions in the troposphere and the stratosphere. Such observations have regularly been made since many years as a contribution to the NDSC (Network for the Detection of Stratospheric Change). They are the only ground-based remote sensing observations available nowadays that carry information about key atmospheric trace species in the free troposphere, among which the most important greenhouse gases. The European UFTIR project (Time series of Upper Free Troposphere observations from a European ground-based FTIR network, http://www.nilu.no/uftir) has focused on maximizing the information content of FTIR long-term monitoring data of some direct and indirect greenhouse gases (CH4, N2O, O3,HCFC-22, and CO and C2H6, respectively). The UFTIR network includes six NDSC stations in Western Europe, covering the polar to subtropical regions. At several stations of the network, the observations span more than a decade. Existing spectral time series have been reanalyzed according to a common optimized retrieval strategy, in order to derive distinct tropospheric and stratospheric abundances of the abovementioned target gases. A bootstrap resampling method has been implemented to evaluate trends of the tropospheric and total burdens of the target gases, including their uncertainties. In parallel, simulations of the target time series have been made with the Oslo CTM2 model: comparisons between the model results and the observations provide valuable information to improve the model, and in particular, to optimize emission estimates that are used as inputs to the model simulations, and to explain the observed trends. The final results of the project will be presented, and ways to proceed will be discussed.
Disciplines :
Earth sciences & physical geography
Author, co-author :
De Mazière, Martine
Vigouroux, Corinne
Blumenstock, Thomas
Hase, Frank
Kramer, Isabell
Mahieu, Emmanuel  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe infra-rouge de phys. atmosph. et solaire (GIRPAS)
Demoulin, Philippe ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe infra-rouge de phys. atmosph. et solaire (GIRPAS)
Duchatelet, Pierre ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe infra-rouge de phys. atmosph. et solaire (GIRPAS)
Mellqvist, Johan
Stranberg, Anders
Velazco, Voltaire
Notholt, Justus
Sussmann, Ralf
Stremme, W.
Rockmann, A.
Gardiner, Tom
Coleman, Mark
Woods, Peter
Ellingsen, Kjerstin
Gauss, Michael
Isaksen, Ivar
Camy-Peyret, Claude
Mondelain, Didier
More authors (13 more) Less
Language :
English
Title :
Advanced exploitation of ground-based Fourier transform infrared observations for tropospheric studies over Europe: achievements of the UFTIR project
Publication date :
2006
Event name :
EGU General Assembly 2006
Event organizer :
European Geosciences Union
Event place :
Vienne, Austria
Event date :
du 2 au 7 avril 2006
Audience :
International
Journal title :
Geophysical Research Abstracts
ISSN :
1029-7006
eISSN :
1607-7962
Publisher :
European Geophysical Society, Katlenburg-Lindau, Germany
Volume :
8
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