DOI: 10.1002/2013JD019760
论文题名: Comparison of CH<inf>4</inf> inversions based on 15 months of GOSAT and SCIAMACHY observations
作者: Monteil G. ; Houweling S. ; Butz A. ; Guerlet S. ; Schepers D. ; Hasekamp O. ; Frankenberg C. ; Scheepmaker R. ; Aben I. ; Röckmann T.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 20 起始页码: 11807
结束页码: 11823
语种: 英语
英文关键词: GOSAT
; inverse modelling
; methane
; SCIAMACHY
Scopus关键词: Atmospheric chemistry
; Inverse problems
; Research laboratories
; Satellites
; Spectrometers
; Surface measurement
; Systematic errors
; Comparisons with measurements
; Fourier transform spectrometers
; GOSAT
; Greenhouse gases observing satellites
; Inverse modelling
; Satellite measurements
; Scanning imaging absorption spectrometer for atmospheric chartography
; SCIAMACHY
; Methane
; atmospheric chemistry
; atmospheric modeling
; comparative study
; error correction
; FTIR spectroscopy
; GOSAT
; in situ measurement
; inverse analysis
; methane
; SCIAMACHY
; source-sink dynamics
; Southern Hemisphere
英文摘要: Over the past decade the development of Scanning Imaging Absorption Spectrometer for Atmospheric Chartography (SCIAMACHY) retrievals has increased the interest in the use of satellite measurements for studying the global sources and sinks of methane. Meanwhile, measurements are becoming available from the more advanced Greenhouse Gases Observing Satellite (GOSAT). The aim of this study is to investigate the application of GOSAT retrievals to inverse modeling, for which we make use of the TM5-4DVAR inverse modeling framework. Inverse modeling calculations are performed using data from two different retrieval approaches: a full physics and a lightpath proxy ratio method. The performance of these inversions is analyzed in comparison with inversions using SCIAMACHY retrievals and measurements from the National Oceanic and Atmospheric Administration-Earth System Research Laboratory flask-sampling network. In addition, we compare the inversion results against independent surface, aircraft, and total-column measurements. Inversions with GOSAT data show good agreement with surface measurements, whereas for SCIAMACHY a similar performance can only be achieved after significant bias corrections. Some inconsistencies between surface and total-column methane remain in the Southern Hemisphere. However, comparisons with measurements from the Total Column Carbon Observing Network in situ Fourier transform spectrometer network indicate that those may be caused by systematic model errors rather than by shortcomings in the GOSAT retrievals. The global patterns of methane emissions derived from SCIAMACHY (with bias correction) and GOSAT retrievals are in remarkable agreement and allow an increased resolution of tropical emissions. The satellite inversions increase tropical methane emission by 30 to 60 TgCH4 /yr compared to initial a priori estimates, partly counterbalanced by reductions in emissions at midlatitudes to high latitudes. Key Points GOSAT and SCIAMACHY retrievals lead to comparable emission patterns GOSAT retrievals are found much less affected by biases than SCIAMACHY Combining satellite and in-situ observations point to remaining inconsistencies ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63223
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Institute of Marine and Atmospheric Research Utrecht, Utrecht University, 3584CC Utrecht, Netherlands; SRON Netherlands Institute for Space Research, Utrecht, Netherlands; IMK-ASF, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany; Now at Laboratoire de Météorologie Dynamique, Institut Pierre-Simon Laplace, Paris, France; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, United States
Recommended Citation:
Monteil G.,Houweling S.,Butz A.,et al. Comparison of CH<inf>4</inf> inversions based on 15 months of GOSAT and SCIAMACHY observations[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(20)