کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5430022 1508705 2009 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
First measurements of the HCFC-142b trend from atmospheric chemistry experiment (ACE) solar occultation spectra
موضوعات مرتبط
مهندسی و علوم پایه شیمی طیف سنجی
پیش نمایش صفحه اول مقاله
First measurements of the HCFC-142b trend from atmospheric chemistry experiment (ACE) solar occultation spectra
چکیده انگلیسی

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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Quantitative Spectroscopy and Radiative Transfer - Volume 110, Issue 18, December 2009, Pages 2127-2134
نویسندگان
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