DOI: 10.1002/grl.50915
论文题名: CFCl3 (CFC-11): UV absorption spectrum temperature dependence measurements and the impact on its atmospheric lifetime and uncertainty
作者: McGillen M.R. ; Fleming E.L. ; Jackman C.H. ; Burkholder J.B.
刊名: Geophysical Research Letters
ISSN: 0094-8579
EISSN: 1944-8310
出版年: 2013
卷: 40, 期: 17 起始页码: 4772
结束页码: 4776
语种: 英语
英文关键词: chlorofluorocarbon
; ozone depleting substance
; photolysis
; UV cross section
Scopus关键词: Atmospheric lifetime
; High-precision measurement
; Ozone depleting substances
; Spectrum parameterization
; Spectrum-temperature dependences
; Temperature dependence
; UV absorption spectrum
; UV cross section
; Absorption spectra
; Absorption spectroscopy
; Atmospheric chemistry
; Chlorofluorocarbons
; Climate change
; Greenhouse gases
; Ozone layer
; Photolysis
; Temperature distribution
; Ultraviolet spectroscopy
; Light absorption
; absorption spectrum
; CFC
; climate change
; cross section
; greenhouse gas
; ozone
; parameterization
; photolysis
; wavelength
英文摘要: CFCl3 (CFC-11) is both an atmospheric ozone-depleting and potent greenhouse gas that is removed primarily via stratospheric UV photolysis. Uncertainty in the temperature dependence of its UV absorption spectrum is a significant contributing factor to the overall uncertainty in its global lifetime and, thus, model calculations of stratospheric ozone recovery and climate change. In this work, the CFC-11 UV absorption spectrum was measured over a range of wavelength (184.95-230 nm) and temperature (216-296 K). We report a spectrum temperature dependence that is less than that currently recommended for use in atmospheric models. The impact on its atmospheric lifetime was quantified using a 2-D model and the spectrum parameterization developed in this work. The calculated global annually averaged lifetime was 58.1 ± 0.7 years (2σ uncertainty due solely to the spectrum uncertainty). The lifetime is slightly reduced and the uncertainty significantly reduced from that obtained using current UV spectrum recommendations. Key Points High precision measurement of CFC-11 UV spectrum T dependence Resolved discrepancies in CFC-11 UV absorption spectrum Significant reduction in photolysis rates and lifetime uncertainty ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84883668108&doi=10.1002%2fgrl.50915&partnerID=40&md5=d2f0318ef576c32fe6d8781ccfe75e23
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5843
Appears in Collections: 气候减缓与适应
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作者单位: Earth System Research Laboratory, Chemical Sciences Division, National Oceanic and Atmospheric Administration, Boulder, CO, United States
Recommended Citation:
McGillen M.R.,Fleming E.L.,Jackman C.H.,et al. CFCl3 (CFC-11): UV absorption spectrum temperature dependence measurements and the impact on its atmospheric lifetime and uncertainty[J]. Geophysical Research Letters,2013-01-01,40(17).