Reference : Optimized approach to retrieve information on atmospheric carbonyl sulfide (OCS) abov...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
http://hdl.handle.net/2268/197817
Optimized approach to retrieve information on atmospheric carbonyl sulfide (OCS) above the Jungfraujoch station and change in its abundance since 1995
English
Lejeune, Bernard mailto [Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe infra-rouge de phys. atmosph. et solaire (GIRPAS) >]
Mahieu, Emmanuel mailto [Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe infra-rouge de phys. atmosph. et solaire (GIRPAS) >]
Vollmer, M. K. [> >]
Reimann, S. [> >]
Bernath, P. F. [> >]
Boone, C. D. [> >]
Walker, K. A. [> >]
Servais, Christian [Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe infra-rouge de phys. atmosph. et solaire (GIRPAS) >]
2017
Journal of Quantitative Spectroscopy and Radiative Transfer
Pergamon Press - An Imprint of Elsevier Science
186
Special Issue - Satellite Remote Sensing and Spectroscopy: Joint ACE-Odin Meeting, October 2015
81-95
Yes (verified by ORBi)
International
0022-4073
Oxford
United Kingdom
[en] carbonyl sulfide ; FTIR ; trend
[en] In this paper, we present an optimized retrieval strategy for carbonyl sulfide (OCS), using Fourier transform infrared (FTIR) solar observations made at the high-altitude Jungfraujoch station in the Swiss Alps. More than 200 lines of the nu3 fundamental band of OCS have been systematically evaluated and we selected 4 microwindows on the basis of objective criteria minimizing the effect of interferences, mainly by solar features, carbon dioxide and water vapor absorption lines, while maximizing the information content. Implementation of this new retrieval strategy provided an extended time series of the OCS abundance spanning the 1995-2015 time period, for the study of the long-term trend and seasonal variation of OCS in the free troposphere and stratosphere.
Three distinct periods characterize the evolution of the tropospheric partial columns: a first decreasing period (1995-2002), an intermediate increasing period (2002-2008), and the more recent period (2008-2015) which shows no significant trend. Our FTIR tropospheric and stratospheric time series are compared with new in situ gas chromatography mass spectrometry (GCMS) measurements performed by Empa (Laboratory for Air Pollution/Environmental Technology) at the Jungfraujoch since 2008, and with space-borne solar occultation observations by the ACE-FTS instrument on-board the SCISAT satellite, respectively, and they show good agreement. The OCS signal recorded above Jungfraujoch appears to be closely related to anthropogenic sulfur emissions.
BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique ; GAW-CH ; F.R.S.-FNRS - Fonds de la Recherche Scientifique ; Canadian Space Agency ; Swiss Federal Office for the Environment
Researchers ; Students
http://hdl.handle.net/2268/197817
10.1016/j.jqsrt.2016.06.001
http://www.sciencedirect.com/science/article/pii/S0022407316300899

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