Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016JD026198 |
Quantification of the SF6 lifetime based on mesospheric loss measured in the stratospheric polar vortex | |
Ray, Eric A.1,2; Moore, Fred L.2,3; Elkins, James W.3; Rosenlof, Karen H.1; Laube, Johannes C.4; Rockmann, Thomas5; Marsh, Daniel R.6; Andrews, Arlyn E.3 | |
2017-04-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:8 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; England; Netherlands |
英文摘要 | Sulfur hexafluoride (SF6) is a greenhouse gas with one of the highest radiative efficiencies in the atmosphere as well as an important indicator of transport time scales in the stratosphere. The current widely used estimate of the atmospheric lifetime of SF6 is 3200years. In this study we use in situ measurements in the 2000 Arctic polar vortex that sampled air with up to 50% SF6 loss to calculate an SF6 lifetime. Comparison of these measurements with output from the Whole Atmosphere Community Climate Model (WACCM) shows that WACCM transport into the vortex is accurate and that an important SF6 loss mechanism, believed to be electron attachment, is missing in the model. Based on the measurements and estimates of the size of the vortex, we calculate an SF6 lifetime of 850years with an uncertainty range of 580-1400years. The amount of SF6 loss is shown to be consistent with that of HFC-227ea, which has a lifetime of 670-780years, adding independent support to our new SF6 lifetime estimate. Based on the revised lifetime the global warming potential of SF6 will decrease only slightly for short time horizons (<100years) but will decrease substantially for time horizons longer than 2000years. Also, the use of SF6 measurements as an indicator of transport time scales in the stratosphere clearly must account for potential influence from polar vortex air. |
英文关键词 | SF6 atmospheric lifetime |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000401180800029 |
WOS关键词 | ATMOSPHERIC LIFETIMES ; OZONE DEPLETION ; AIR ; AGE ; CO2 ; MODEL ; TROPOSPHERE ; ELECTRON ; DESCENT ; TRENDS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/33569 |
专题 | 气候变化 |
作者单位 | 1.NOAA, Div Chem Sci, Earth Syst Res Lab, Boulder, CO 80305 USA; 2.Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA; 3.NOAA, Global Monitoring Div, Earth Syst Res Lab, Boulder, CO USA; 4.Univ East Anglia, Sch Environm Sci, Ctr Ocean & Atmospher Sci, Norwich, Norfolk, England; 5.Univ Utrecht, Inst Marine & Atmospher Res, Utrecht, Netherlands; 6.Natl Ctr Atmospher Res, Atmospher Chem Observat & Modeling Lab, POB 3000, Boulder, CO 80307 USA |
推荐引用方式 GB/T 7714 | Ray, Eric A.,Moore, Fred L.,Elkins, James W.,et al. Quantification of the SF6 lifetime based on mesospheric loss measured in the stratospheric polar vortex[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(8). |
APA | Ray, Eric A..,Moore, Fred L..,Elkins, James W..,Rosenlof, Karen H..,Laube, Johannes C..,...&Andrews, Arlyn E..(2017).Quantification of the SF6 lifetime based on mesospheric loss measured in the stratospheric polar vortex.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(8). |
MLA | Ray, Eric A.,et al."Quantification of the SF6 lifetime based on mesospheric loss measured in the stratospheric polar vortex".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.8(2017). |
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