Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-2255-2017 |
The recent increase of atmospheric methane from 10 years of ground-based NDACC FTIR observations since 2005 | |
Bader, Whitney1; 39;Doherty, Simon2 | |
2017-02-14 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:3 |
文章类型 | Article |
语种 | 英语 |
国家 | Belgium; Canada; New Zealand; USA; Germany; Switzerland; Spain; Australia; Japan; England |
英文摘要 | Changes of atmospheric methane total columns (CH4) since 2005 have been evaluated using Fourier transform infrared (FTIR) solar observations carried out at 10 ground-based sites, affiliated to the Network for Detection of Atmospheric Composition Change (NDACC). From this, we find an increase of atmospheric methane total columns of 0.31 +/- 0.03% year(-1) (2 sigma level of uncertainty) for the 2005-2014 period. Comparisons with in situ methane measurements at both local and global scales show good agreement. We used the GEOS-Chem chemical transport model tagged simulation, which accounts for the contribution of each emission source and one sink in the total methane, simulated over 2005-2012. After regridding according to NDACC vertical layering using a conservative regridding scheme and smoothing by convolving with respective FTIR seasonal averaging kernels, the GEOS-Chem simulation shows an increase of atmospheric methane total columns of 0.35 +/- 0.03% year(-1) between 2005 and 2012, which is in agreement with NDACC measurements over the same time period (0.30 +/- 0.04% year(-1), averaged over 10 stations). Analysis of the GEOS-Chem-tagged simulation allows us to quantify the contribution of each tracer to the global methane change since 2005. We find that natural sources such as wetlands and biomass burning contribute to the interannual variability of methane. However, anthropogenic emissions, such as coal mining, and gas and oil transport and exploration, which are mainly emitted in the Northern Hemisphere and act as secondary contributors to the global budget of methane, have played a major role in the increase of atmospheric methane observed since 2005. Based on the GEOS-Chem-tagged simulation, we discuss possible cause(s) for the increase of methane since 2005, which is still unexplained. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000395118000003 |
WOS关键词 | NATURAL-GAS PRODUCTION ; MOLECULAR SPECTROSCOPIC DATABASE ; INFRARED SOLAR ; UNITED-STATES ; FOSSIL-FUEL ; INTERANNUAL VARIABILITY ; ISOTOPIC COMPOSITION ; GREENHOUSE GASES ; FREE TROPOSPHERE ; SATELLITE DATA |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; 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/31118 |
专题 | 地球科学 |
作者单位 | 1.Univ Liege, Inst Astrophys & Geophys, Liege, Belgium; 2.Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada; 3.NIWA, Natl Inst Water & Atmospher Res, Lauder, New Zealand; 4.Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA USA; 5.Karlsruhe Inst Technol, Inst Meteorol & Climate Res IMK ASF, Karlsruhe, Germany; 6.Univ Waterloo, Dept Chem, Waterloo, ON N2L 3G1, Canada; 7.MeteoSwiss, Fed Off Meteorol & Climatol, CH-1530 Payerne, Switzerland; 8.ETH, Inst Atmospher & Climate Sci, Zurich, Switzerland; 9.Agencia Estatal Meteorol AEMET, IARC, Izana, Spain; 10.Univ Wollongong, Sch Chem, Wollongong, NSW, Australia; 11.Karlsruhe Inst Technol, IMK IFU, Garmisch Partenkirchen, Germany; 12.CSIRO Oceans & Atmosphere, Aspendale, Vic, Australia; 13.Tohoku Univ, Grad Sch Environm Studies, Sendai, Miyagi 980, Japan; 14.Natl Inst Environm Studies NIES, Tsukuba, Ibaraki 305, Japan; 15.Univ Bristol, Sch Chem, Atmospher Chem Res Grp ACRG, Bristol, Avon, England |
推荐引用方式 GB/T 7714 | Bader, Whitney,39;Doherty, Simon. The recent increase of atmospheric methane from 10 years of ground-based NDACC FTIR observations since 2005[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(3). |
APA | Bader, Whitney,&39;Doherty, Simon.(2017).The recent increase of atmospheric methane from 10 years of ground-based NDACC FTIR observations since 2005.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(3). |
MLA | Bader, Whitney,et al."The recent increase of atmospheric methane from 10 years of ground-based NDACC FTIR observations since 2005".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.3(2017). |
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