First measurements of the HCFC-142b trend from atmospheric chemistry experiment (ACE) solar occultation spectra

被引：8
|
作者：
Rinsland, Curtis P. [1 ]
Chiou, Linda [2 ]
Boone, Chris [3 ]
Bernath, Peter [4 ]
Mahieu, Emmanuel [5 ]
机构：
[1] NASA, Langley Res Ctr, Hampton, VA 23665 USA
[2] Sci Syst & Applicat Inc, Hampton, VA USA
[3] Univ Waterloo, Dept Chem, Waterloo, ON N2L 3G1, Canada
[4] Univ York, Dept Chem, York YO10 5DD, N Yorkshire, England
[5] Univ Liege, Inst Astrophys & Geophys, Liege, Belgium
来源：
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER | 2009年 / 110卷 / 18期
关键词：
Remote sensing; Atmospheric chemistry; Composition; Hydrochlorofluorocarbons; Trends; Ozone depletion;
D O I：
10.1016/j.jqsrt.2009.05.011
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The first measurement of the HCFC-142b (CH3CClF2) trend near the tropopause has been derived from volume mixing ratio (VMR) measurements at northern and southern hemisphere mid-latitudes for the 2004-2008 time period from spaceborne solar occultation observations recorded at 0.02 cm(-1) resolution with the ACE (atmospheric chemistry experiment) Fourier transform spectrometer. The HCFC-142b molecule is currently the third most abundant HCFC (hydrochlorofluorocarbon) in the atmosphere and ACE measurements over this time span show a continuous rise in its volume mixing ratio. Monthly average measurements at northern and southern hemisphere mid-latitudes have similar increase rates that are consistent with surface trend measurements for a similar time span. A mean northern hemisphere profile for the time span shows a near constant VMR at 8-20 km altitude range, consistent on average for the same time span with in situ results. The nearly constant vertical VMR profile also agrees with model predictions of a long lifetime in the lower atmosphere. (c) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2127 / 2134
页数：8
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