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Tropospheric boundary layer investigations by differential ground-based solar FTIR spectrometry
Barret, Brice; Mahieu, Emmanuel; Carleer, Michel et al.
1999In Carleer, Michel; Hilton, Moira; Lamp, Thorsten et al. (Eds.) Environmental Sensing and Applications (Proceedings Volume)
 

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Keywords :
remote sensing; troposphere; FTIR spectrometer
Abstract :
[en] In order to better understand the chemistry and the transport mechanisms in the lower troposphere, a new original technique has been developed and tested. The experiment consists in recording high resolution infrared solar absorption spectra containing signatures of important atmospheric constituents, simultaneously from the International Scientific Station of the Jungfraujoch in Switzerland [ISSJ, 3580 m a.s.l., 46.5 degrees N, 8 degrees E, Bruker 120 HR Fourier transform spectrometer (FTS)] and from a nearby valley (Grindelwald, 1070 m a.s.l., Bruker 120 M FTS). Analysis of individual spectra allows to determine vertical column abundances: differences between measurements at ISSJ and at Grindelwald enable us to retrieve the constituents' concentrations between 1070 m and 3580 m, assuming a constant volume mixing ratio in this layer. A first measurement campaign has been organized during the months of May and June 1998. After an initial period of instrument intercomparison at ISSJ, the mobile instrument was moved down in the valley and installed for one month in Grindelwald. When operated side by side at the Jungfraujoch, measurements made by both instruments showed a very good agreement (maximum bias of 1.5%). Analysis of spectra recorded synchronously at the Jungfraujoch and at Grindelwald gave average boundary layer concentrations for a selected set of tropospheric molecules, i.e. methane, nitrous oxide, carbon monoxide and ethane. Comparison with other results and with carbon monoxide in-situ measurements made at ISSJ showed a good agreement.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Barret, Brice
Mahieu, Emmanuel  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe infra-rouge de phys. atmosph. et solaire (GIRPAS)
Carleer, Michel
De Mazière, Martine
Colin, Réginald
Zander, Rodolphe ;  Université de Liège - ULiège > Services généraux (Faculté des sciences) > Relations académiques et scientifiques (Sciences)
Language :
English
Title :
Tropospheric boundary layer investigations by differential ground-based solar FTIR spectrometry
Publication date :
16 September 1999
Audience :
International
Main work title :
Environmental Sensing and Applications (Proceedings Volume)
Editor :
Carleer, Michel
Hilton, Moira
Lamp, Thorsten
Reuter, Rainer
Russwurm, George
Schaefer, Klaus
Webber, Konradin
Weitkamp, Klaus
Wolf, Jean-Pierre
Woppowa, Ljuba
ISBN/EAN :
9780819433077
Collection name :
Proceedings of SPIE Volume: 3821
Pages :
116-123
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