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Shirai T, Ishizawa M, Zhuravlev R, Ganshin A, Belikov D, Saito M, Oda T, Valsala V, Gomez-Pelaez AJ, Langenfelds R, Maksyutov S. A decadal inversion of CO 2 using the Global Eulerian-Lagrangian Coupled Atmospheric model (GELCA): sensitivity to the ground-based observation network. Tellus B Chem Phys Meteorol 2017; 69:1291158. [PMID: 32848290 PMCID: PMC7447134 DOI: 10.1080/16000889.2017.1291158] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We present an assimilation system for atmospheric carbon dioxide (CO2) using a Global Eulerian-Lagrangian Coupled Atmospheric model (GELCA), and demonstrate its capability to capture the observed atmospheric CO2 mixing ratios and to estimate CO2 fluxes. With the efficient data handling scheme in GELCA, our system assimilates non-smoothed CO2 data from observational data products such as the Observation Package (ObsPack) data products as constraints on surface fluxes. We conducted sensitivity tests to examine the impact of the site selections and the prior uncertainty settings of observation on the inversion results. For these sensitivity tests, we made five different site/data selections from the ObsPack product. In all cases, the time series of the global net CO2 flux to the atmosphere stayed close to values calculated from the growth rate of the observed global mean atmospheric CO2 mixing ratio. At regional scales, estimated seasonal CO2 fluxes were altered, depending on the CO2 data selected for assimilation. Uncertainty reductions (URs) were determined at the regional scale and compared among cases. As measures of the model-data mismatch, we used the model-data bias, root-mean-square error, and the linear correlation. For most observation sites, the model-data mismatch was reasonably small. Regarding regional flux estimates, tropical Asia was one of the regions that showed a significant impact from the observation network settings. We found that the surface fluxes in tropical Asia were the most sensitive to the use of aircraft measurements over the Pacific, and the seasonal cycle agreed better with the results of bottom-up studies when the aircraft measurements were assimilated. These results confirm the importance of these aircraft observations, especially for constraining surface fluxes in the tropics.
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Affiliation(s)
- T Shirai
- Center for Global Environmental Research, National Institute for Environmental Studies, Tsukuba, Japan
| | - M Ishizawa
- Center for Global Environmental Research, National Institute for Environmental Studies, Tsukuba, Japan
| | - R Zhuravlev
- Central Aerological Observatory, Dolgoprudny, Russia
| | - A Ganshin
- Central Aerological Observatory, Dolgoprudny, Russia
| | - D Belikov
- Center for Global Environmental Research, National Institute for Environmental Studies, Tsukuba, Japan
- Tomsk State University, Tomsk, Russia
- National Institute of Polar Research, Tachikawa, Japan
| | - M Saito
- Center for Global Environmental Research, National Institute for Environmental Studies, Tsukuba, Japan
| | - T Oda
- Goddard Earth Sciences Technology and Research, Universities Space Research Association, Columbia, MD, USA / Global Modeling and Assimilation Office, NASA Goddard Space Flight Center, Greenbelt, MD, USA
| | - V Valsala
- Indian Institute for Tropical Meteorology
| | - A J Gomez-Pelaez
- Izaña Atmospheric Research Center, Meteorological State Agency of Spain, Izaña, Spain
| | - R Langenfelds
- Oceans and Atmosphere Flagship, Commonwealth Scientific and Industrial Research Organization, Aspendale, Australia
| | - S Maksyutov
- Center for Global Environmental Research, National Institute for Environmental Studies, Tsukuba, Japan
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Bousquet P, Yver C, Pison I, Li YS, Fortems A, Hauglustaine D, Szopa S, Rayner PJ, Novelli P, Langenfelds R, Steele P, Ramonet M, Schmidt M, Foster P, Morfopoulos C, Ciais P. A three-dimensional synthesis inversion of the molecular hydrogen cycle: Sources and sinks budget and implications for the soil uptake. ACTA ACUST UNITED AC 2011. [DOI: 10.1029/2010jd014599] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Huang J, Golombek A, Prinn R, Weiss R, Fraser P, Simmonds P, Dlugokencky EJ, Hall B, Elkins J, Steele P, Langenfelds R, Krummel P, Dutton G, Porter L. Estimation of regional emissions of nitrous oxide from 1997 to 2005 using multinetwork measurements, a chemical transport model, and an inverse method. ACTA ACUST UNITED AC 2008. [DOI: 10.1029/2007jd009381] [Citation(s) in RCA: 84] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Sturm P, Leuenberger M, Sirignano C, Neubert REM, Meijer HAJ, Langenfelds R, Brand WA, Tohjima Y. Permeation of atmospheric gases through polymer O-rings used in flasks for air sampling. ACTA ACUST UNITED AC 2004. [DOI: 10.1029/2003jd004073] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- P. Sturm
- Climate and Environmental Physics, Physics Institute; University of Bern; Bern Switzerland
| | - M. Leuenberger
- Climate and Environmental Physics, Physics Institute; University of Bern; Bern Switzerland
| | - C. Sirignano
- Centrum voor IsotopenOnderzoek; University of Groningen; Groningen Netherlands
| | - R. E. M. Neubert
- Centrum voor IsotopenOnderzoek; University of Groningen; Groningen Netherlands
| | - H. A. J. Meijer
- Centrum voor IsotopenOnderzoek; University of Groningen; Groningen Netherlands
| | - R. Langenfelds
- Commonwealth Scientific and Industrial Research Organisation Atmospheric Research; Aspendale Australia
- Institute of Antarctic and Southern Ocean Studies; University of Tasmania; Hobart Tasmania Australia
| | - W. A. Brand
- Max Planck Institute for Biogeochemistry; Jena Germany
| | - Y. Tohjima
- Atmospheric Environment Division; National Institute for Environmental Studies; Tsukuba Japan
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Fraser P, Cunnold D, Alyea F, Weiss R, Prinn R, Simmonds P, Miller B, Langenfelds R. Lifetime and emission estimates of 1,1,2-trichlorotrifluorethane (CFC-113) from daily global background observations June 1982-June 1994. ACTA ACUST UNITED AC 1996. [DOI: 10.1029/96jd00574] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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