Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018JD028917 |
Measurement and Modeling of Air-Broadened Methane Absorption in the MERLIN Spectral Region at Low Temperatures | |
Delahaye, T.1; Ghysels, M.2; Hodges, J. T.2; Sung, K.3; Armante, R.1; Tran, H.4 | |
2019-03-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2019 |
卷号 | 124期号:6页码:3556-3564 |
文章类型 | Article |
语种 | 英语 |
国家 | France; USA |
英文摘要 | The ability to precisely model methane absorption in the R(6) manifold of the 2 nu(3) band at atmospheric pressure and temperature conditions is a key technical requirement of the German-French, Methane Remote Sensing Lidar (MERLIN) space mission. To this end, 27 high-resolution and high-signal-to-noise-ratio absorption spectra of air-broadened (CH4)-C-12 were recorded using a variable-temperature frequency-stabilized cavity ring-down spectroscopy apparatus. The measurement conditions corresponded to sample temperature, pressure, and methane molar fraction values spanning 220-290K, 4-110kPa, and 4-7 mol/mol, respectively. The measured spectra were fit using the sum of isolated Hartmann-Tran profiles with the addition of line mixing. For each line within the manifold, all spectroscopic parameters at room temperature were fixed to our previously obtained values (Delahaye et al., 2016, https://doi.org/10.1002/2015JD024524) and only the temperature dependences of the model parameters were adjusted. The results show that the fitted model agrees with the measured methane absorption to better than 0.3% for the entire R(6) manifold spectral region and to within 0.1% at the online position of the MERLIN for all considered pressure and temperature conditions. A first comparison with ground-based atmospheric measurement was also made showing significant improvement with respect to existing spectroscopic modeling of methane absorption. |
英文关键词 | MERLIN atmospheric methane absorption cross section line shape |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000464653500042 |
WOS关键词 | DIODE-LASER MEASUREMENTS ; SPEED DEPENDENCE ; H2O TRANSITIONS ; PARAMETERS ; SIMULATIONS ; PERFORMANCE ; VALIDATION ; COLLISIONS ; SHAPE ; CH3F |
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/181742 |
专题 | 气候变化 |
作者单位 | 1.Univ Paris Saclay, Ecole Polytech, Lab Meteorol Dynam, IPSL,CNRS, Palaiseau, France; 2.NIST, Gaithersburg, MD 20899 USA; 3.CALTECH, Jet Prop Lab, Pasadena, CA USA; 4.PSL Res Univ, Sorbonne Univ, Ecole Normale Super, Lab Meteorol Dynam,IPSL,CNRS,Ecole Polytech, Paris, France |
推荐引用方式 GB/T 7714 | Delahaye, T.,Ghysels, M.,Hodges, J. T.,et al. Measurement and Modeling of Air-Broadened Methane Absorption in the MERLIN Spectral Region at Low Temperatures[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2019,124(6):3556-3564. |
APA | Delahaye, T.,Ghysels, M.,Hodges, J. T.,Sung, K.,Armante, R.,&Tran, H..(2019).Measurement and Modeling of Air-Broadened Methane Absorption in the MERLIN Spectral Region at Low Temperatures.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,124(6),3556-3564. |
MLA | Delahaye, T.,et al."Measurement and Modeling of Air-Broadened Methane Absorption in the MERLIN Spectral Region at Low Temperatures".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 124.6(2019):3556-3564. |
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