期刊
ATMOSPHERIC CHEMISTRY AND PHYSICS
卷 10, 期 13, 页码 5903-5910出版社
COPERNICUS GESELLSCHAFT MBH
DOI: 10.5194/acp-10-5903-2010
关键词
-
资金
- UK Natural Environment Research Council [NE/F015585/1, NE/F021194/1]
- European Union [GOCE-CT-2003-505390]
- European Space Agency
- CNRS-INSIS
- Belgium (FNRS-CFB and FWO)
- Canada (GSC)
- China (CAS)
- Denmark (FIST)
- France (IPEV, CNRS/INSU, CEA and ANR)
- Germany (AWI)
- Iceland (RannIs)
- Japan (NIPR)
- Korea (KOPRI)
- The Netherlands (NWO/ALW)
- Sweden (VR)
- Switzerland (SNF)
- UK (NERC)
- USA (US NSF)
- EC [RECONCILE-226365-FP7-ENV-2008-1]
- Natural Environment Research Council [ncas10006, NE/F015585/1, NE/F021194/1, ncas10008] Funding Source: researchfish
- NERC [ncas10006, NE/F015585/1, ncas10008] Funding Source: UKRI
We report the first measurements of 1,1,1,2,3,3,3-heptafluoropropane (HFC-227ea), a substitute for ozone depleting compounds, in air samples originating from remote regions of the atmosphere and present evidence for its accelerating growth. Observed mixing ratios ranged from below 0.01 ppt in deep firn air to 0.59 ppt in the current northern mid-latitudinal upper troposphere. Firn air samples collected in Greenland were used to reconstruct a history of atmospheric abundance. Year-on-year increases were deduced, with acceleration in the growth rate from 0.029 ppt per year in 2000 to 0.056 ppt per year in 2007. Upper tropospheric air samples provide evidence for a continuing growth until late 2009. Furthermore we calculated a stratospheric lifetime of 370 years from measurements of air samples collected on board high altitude aircraft and balloons. Emission estimates were determined from the reconstructed atmospheric trend and suggest that current bottom-up estimates of global emissions for 2005 are too high by a factor of three.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据