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Global estimates of CO sources with high resolution by adjoint inversion of multiple satellite datasets (MOPITT, AIRS, SCIAMACHY, TES)

Journal Article


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Abstract


  • We combine CO column measurements from the MOPITT, AIRS, SCIAMACHY, and TES satellite instruments in a full-year (May 2004-April 2005) global inversion of CO sources at 4°×5° spatial resolution and monthly temporal resolution. The inversion uses the GEOS-Chem chemical transport model (CTM) and its adjoint applied to MOPITT, AIRS, and SCIAMACHY. Observations from TES, surface sites (NOAA/GMD), and aircraft (MOZAIC) are used for evaluation of the a posteriori solution. Using GEOS-Chem as a common intercomparison platform shows global consistency between the different satellite datasets and with the in situ data. Differences can be largely explained by different averaging kernels and a priori information. The global CO emission from combustion as constrained in the inversion is 1350 Tg a 1. This is much higher than current bottom-up emission inventories. A large fraction of the correction results from a seasonal underestimate of CO sources at northern mid-latitudes in winter and suggests a larger-than-expected CO source from vehicle cold starts and residential heating. Implementing this seasonal variation of emissions solves the long-standing problem of models underestimating CO in the northern extratropics in winter-spring. A posteriori emissions also indicate a general underestimation of biomass burning in the GFED2 inventory. However, the tropical biomass burning constraints are not quantitatively consistent across the different datasets.

UOW Authors


  •   Kopacz, Monika (external author)
  •   Jacob, Daniel J. (external author)
  •   Fisher, Jenny
  •   Logan, J A. (external author)
  •   Zhang, Lin (external author)
  •   Megretskaia, I A. (external author)
  •   Yantosca, Robert M. (external author)
  •   Singh, K (external author)
  •   Henze, D K. (external author)
  •   Burrows, J P. (external author)
  •   Buchwitz, Michael (external author)
  •   Khlystova, I (external author)
  •   McMillan, W. Wallace (external author)
  •   Gille, J C. (external author)
  •   Edwards, D P. (external author)
  •   Eldering, A (external author)
  •   Thouret, V (external author)
  •   Nedelec, P (external author)

Publication Date


  • 2010

Citation


  • Kopacz, M., Jacob, D. J., Fisher, J. A., Logan, J. A., Zhang, L., Megretskaia, I. A., Yantosca, R. M., Singh, K., Henze, D. K., Burrows, J. P., Buchwitz, M., Khlystova, I., McMillan, W., Gille, J. C., Edwards, D. P., Eldering, A., Thouret, V. & Nedelec, P. (2010). Global estimates of CO sources with high resolution by adjoint inversion of multiple satellite datasets (MOPITT, AIRS, SCIAMACHY, TES). Atmospheric Chemistry and Physics, 10 (3), 855-876.

Scopus Eid


  • 2-s2.0-75949101080

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=8036&context=scipapers

Ro Metadata Url


  • http://ro.uow.edu.au/scipapers/4693

Number Of Pages


  • 21

Start Page


  • 855

End Page


  • 876

Volume


  • 10

Issue


  • 3

Abstract


  • We combine CO column measurements from the MOPITT, AIRS, SCIAMACHY, and TES satellite instruments in a full-year (May 2004-April 2005) global inversion of CO sources at 4°×5° spatial resolution and monthly temporal resolution. The inversion uses the GEOS-Chem chemical transport model (CTM) and its adjoint applied to MOPITT, AIRS, and SCIAMACHY. Observations from TES, surface sites (NOAA/GMD), and aircraft (MOZAIC) are used for evaluation of the a posteriori solution. Using GEOS-Chem as a common intercomparison platform shows global consistency between the different satellite datasets and with the in situ data. Differences can be largely explained by different averaging kernels and a priori information. The global CO emission from combustion as constrained in the inversion is 1350 Tg a 1. This is much higher than current bottom-up emission inventories. A large fraction of the correction results from a seasonal underestimate of CO sources at northern mid-latitudes in winter and suggests a larger-than-expected CO source from vehicle cold starts and residential heating. Implementing this seasonal variation of emissions solves the long-standing problem of models underestimating CO in the northern extratropics in winter-spring. A posteriori emissions also indicate a general underestimation of biomass burning in the GFED2 inventory. However, the tropical biomass burning constraints are not quantitatively consistent across the different datasets.

UOW Authors


  •   Kopacz, Monika (external author)
  •   Jacob, Daniel J. (external author)
  •   Fisher, Jenny
  •   Logan, J A. (external author)
  •   Zhang, Lin (external author)
  •   Megretskaia, I A. (external author)
  •   Yantosca, Robert M. (external author)
  •   Singh, K (external author)
  •   Henze, D K. (external author)
  •   Burrows, J P. (external author)
  •   Buchwitz, Michael (external author)
  •   Khlystova, I (external author)
  •   McMillan, W. Wallace (external author)
  •   Gille, J C. (external author)
  •   Edwards, D P. (external author)
  •   Eldering, A (external author)
  •   Thouret, V (external author)
  •   Nedelec, P (external author)

Publication Date


  • 2010

Citation


  • Kopacz, M., Jacob, D. J., Fisher, J. A., Logan, J. A., Zhang, L., Megretskaia, I. A., Yantosca, R. M., Singh, K., Henze, D. K., Burrows, J. P., Buchwitz, M., Khlystova, I., McMillan, W., Gille, J. C., Edwards, D. P., Eldering, A., Thouret, V. & Nedelec, P. (2010). Global estimates of CO sources with high resolution by adjoint inversion of multiple satellite datasets (MOPITT, AIRS, SCIAMACHY, TES). Atmospheric Chemistry and Physics, 10 (3), 855-876.

Scopus Eid


  • 2-s2.0-75949101080

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=8036&context=scipapers

Ro Metadata Url


  • http://ro.uow.edu.au/scipapers/4693

Number Of Pages


  • 21

Start Page


  • 855

End Page


  • 876

Volume


  • 10

Issue


  • 3