Article (Scientific journals)
Long-term evolution in the tropospheric concentration of chlorofluorocarbon 12 (CCl2F2) derived from high-spectral resolution infrared solar absorption spectra: retrieval and comparison with in situ surface measurements
Rinsland, Curtis P.; Goldman, Aaron; Mahieu, Emmanuel et al.
2005In Journal of Quantitative Spectroscopy and Radiative Transfer, 92 (2), p. 201-209
Peer Reviewed verified by ORBi
 

Files


Full Text
Rinsland_CFC12_JQSRT_92_201-209_2005.pdf
Publisher postprint (411.97 kB)
Request a copy

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
remote sensing; chlorofluorocarbons; troposphere; atmospheric chemistry; pollution; ozone; greenhouse gas
Abstract :
[en] The average tropospheric volume mixing ratios of chlorofluorocarbon 12 (CCl2F2) have been retrieved from high-spectral resolution ground-based infrared solar-absorption spectra recorded from March 1982 to October 2003 with the McMath Fourier transform spectrometer at the US National Solar Observatory facility on Kitt Peak in southern Arizona (31.9degreesN, 111.6degreesW, 2.09 km altitude). The retrievals are based on fits to the unresolved v(8) band Q-branches near 922 cm(-1) using the SFIT2 retrieval algorithm. The annual increase rate was equal to (16.88 +/- 1.37) parts per trillion (10(-12)) by volume at the beginning of the time series, March 1982, or (4.77 +/- 0.04)%, 1 sigma, declining progressively to (2.49 +/- 1.24) parts per trillion, by volume at the end, October 2003, or (0.46 +/- 0.24)%, 1 sigma. Average tropospheric mixing ratios from the solar spectra have been compared with average surface flask and in situ sampling measurements from the Climate Monitoring and Diagnostics Laboratory (CMDL) station at Niwot Ridge, CO, (USA) (40.0degreesN, 105.5degreesW, 3013 m altitude). The average ratio and standard deviation of the monthly means of the retrieved tropospheric mixing ratios relative to the CMDL surface mixing ratios is (1.01 +/- 0.03) for the overlapping time period. Both datasets demonstrate the progressive impact of the Montreal protocol and its strengthening amendments on the trend of CCl2F2, though a tropospheric decrease has yet to be observed. (C) 2004 Elsevier Ltd. All rights reserved.
Disciplines :
Physics
Author, co-author :
Rinsland, Curtis P.
Goldman, Aaron
Mahieu, Emmanuel  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe infra-rouge de phys. atmosph. et solaire (GIRPAS)
Zander, Rodolphe ;  Université de Liège - ULiège > Services généraux (Faculté des sciences) > Relations académiques et scientifiques (Sciences)
Chiou, Linda S.
Hannigan, James W.
Wood, Stephen W.
Elkins, James W.
Language :
English
Title :
Long-term evolution in the tropospheric concentration of chlorofluorocarbon 12 (CCl2F2) derived from high-spectral resolution infrared solar absorption spectra: retrieval and comparison with in situ surface measurements
Publication date :
01 May 2005
Journal title :
Journal of Quantitative Spectroscopy and Radiative Transfer
ISSN :
0022-4073
Publisher :
Pergamon-Elsevier Science Ltd, Oxford, United Kingdom
Volume :
92
Issue :
2
Pages :
201-209
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 12 December 2008

Statistics


Number of views
85 (4 by ULiège)
Number of downloads
3 (3 by ULiège)

Scopus citations®
 
9
Scopus citations®
without self-citations
3
OpenCitations
 
12

Bibliography


Similar publications



Contact ORBi