Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-18-15959-2018 |
Monitoring global tropospheric OH concentrations using satellite observations of atmospheric methane | |
Zhang, Yuzhong1,2; Jacob, Daniel J.1; Maasakkers, Joannes D.1; Sulprizio, Melissa P.1; Sheng, Jian-Xiong1; Gautam, Ritesh2; Worden, John3 | |
2018-11-07 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2018 |
卷号 | 18期号:21页码:15959-15973 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The hydroxyl radical (OH) is the main tropospheric oxidant and the main sink for atmospheric methane. The global abundance of OH has been monitored for the past decades using atmospheric methyl chloroform (CH3CCl3) as a proxy. This method is becoming ineffective as atmospheric CH3CCl3 concentrations decline. Here we propose that satellite observations of atmospheric methane in the short-wave infrared (SWIR) and thermal infrared (TIR) can provide an alternative method for monitoring global OH concentrations. The premise is that the atmospheric signature of the methane sink from oxidation by OH is distinct from that of methane emissions. We evaluate this method in an observing system simulation experiment (OSSE) framework using synthetic SWIR and TIR satellite observations representative of the TROPOMI and CrIS instruments, respectively. The synthetic observations are interpreted with a Bayesian inverse analysis, optimizing both gridded methane emissions and global OH concentrations. The optimization is done analytically to provide complete error accounting, including error correlations between posterior emissions and OH concentrations. The potential bias caused by prior errors in the 3-D seasonal OH distribution is examined using OH fields from 12 different models in the ACCMIP archive. We find that the satellite observations of methane have the potential to constrain the global tropospheric OH concentration with a precision better than 1% and an accuracy of about 3% for SWIR and 7% for TIR. The inversion can successfully separate the effects of perturbations to methane emissions and to OH concentrations. Interhemispheric differences in OH concentrations can also be successfully retrieved. Error estimates may be overoptimistic because we assume in this OSSE that errors are strictly random and have no systematic component. The availability of TROPOMI and CrIS data will soon provide an opportunity to test the method with actual observations. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000449479800004 |
WOS关键词 | HIGH-SPATIAL-RESOLUTION ; METHYL CHLOROFORM ; EMISSIONS ; CH4 ; VARIABILITY ; INVERSION ; SCIAMACHY ; CHEMISTRY ; HYDROXYL ; GOSAT |
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/20628 |
专题 | 地球科学 |
作者单位 | 1.Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA; 2.Environm Def Fund, Washington, DC 20009 USA; 3.CALTECH, Jet Prop Lab, Pasadena, CA USA |
推荐引用方式 GB/T 7714 | Zhang, Yuzhong,Jacob, Daniel J.,Maasakkers, Joannes D.,et al. Monitoring global tropospheric OH concentrations using satellite observations of atmospheric methane[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(21):15959-15973. |
APA | Zhang, Yuzhong.,Jacob, Daniel J..,Maasakkers, Joannes D..,Sulprizio, Melissa P..,Sheng, Jian-Xiong.,...&Worden, John.(2018).Monitoring global tropospheric OH concentrations using satellite observations of atmospheric methane.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(21),15959-15973. |
MLA | Zhang, Yuzhong,et al."Monitoring global tropospheric OH concentrations using satellite observations of atmospheric methane".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.21(2018):15959-15973. |
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