Articles | Volume 10, issue 6
https://doi.org/10.5194/gmd-10-2201-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/gmd-10-2201-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Development and technical paper
| 
15 Jun 2017
Development and technical paper |
| 15 Jun 2017
A 4D-Var inversion system based on the icosahedral grid model (NICAM-TM 4D-Var v1.0) – Part 2: Optimization scheme and identical twin experiment of atmospheric CO2 inversion
Oceanography and Geochemistry Research Department, Meteorological Research Institute, Tsukuba, Japan
Yosuke Fujii
Oceanography and Geochemistry Research Department, Meteorological Research Institute, Tsukuba, Japan
Yousuke Sawa
Oceanography and Geochemistry Research Department, Meteorological Research Institute, Tsukuba, Japan
Yosuke Iida
Global Environment and Marine Department, Japan Meteorological Agency, Tokyo, Japan
Akihiko Ito
Center for Global Environmental Research, National Institute for Environmental Studies, Tsukuba, Japan
Masaki Satoh
Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Japan
Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan
Ryoichi Imasu
Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Japan
Kazuhiro Tsuboi
Oceanography and Geochemistry Research Department, Meteorological Research Institute, Tsukuba, Japan
Hidekazu Matsueda
Oceanography and Geochemistry Research Department, Meteorological Research Institute, Tsukuba, Japan
Nobuko Saigusa
Center for Global Environmental Research, National Institute for Environmental Studies, Tsukuba, Japan
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- A conjugate BFGS method for accurate estimation of a posterior error covariance matrix in a linear inverse problem Y. Niwa & Y. Fujii 10.1002/qj.3838
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- Estimated regional CO2 flux and uncertainty based on an ensemble of atmospheric CO2 inversions N. Chandra et al. 10.5194/acp-22-9215-2022
- Assessment of methane emissions from oil, gas and coal sectors across inventories and atmospheric inversions K. Tibrewal et al. 10.1038/s43247-023-01190-w
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- Comparing national greenhouse gas budgets reported in UNFCCC inventories against atmospheric inversions Z. Deng et al. 10.5194/essd-14-1639-2022
- Increasing terrestrial ecosystem carbon release in response to autumn cooling and warming R. Tang et al. 10.1038/s41558-022-01304-w
- An Assessment of CO2 Uptake in the Arctic Ocean From 1985 to 2018 S. Yasunaka et al. 10.1029/2023GB007806
- National CO2 budgets (2015–2020) inferred from atmospheric CO2 observations in support of the global stocktake B. Byrne et al. 10.5194/essd-15-963-2023
- Detection of fossil-fuel CO2 plummet in China due to COVID-19 by observation at Hateruma Y. Tohjima et al. 10.1038/s41598-020-75763-6
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- The greenhouse gas observation mission with Global Observing SATellite for Greenhouse gases and Water cycle (GOSAT-GW): objectives, conceptual framework and scientific contributions H. Tanimoto et al. 10.1186/s40645-025-00684-9
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- Global Carbon Budget 2021 P. Friedlingstein et al. 10.5194/essd-14-1917-2022
- A 4D-Var inversion system based on the icosahedral grid model (NICAM-TM 4D-Var v1.0) – Part 1: Offline forward and adjoint transport models Y. Niwa et al. 10.5194/gmd-10-1157-2017
22 citations as recorded by crossref.
- The consolidated European synthesis of CH4 and N2O emissions for the European Union and United Kingdom: 1990–2019 A. Petrescu et al. 10.5194/essd-15-1197-2023
- The consolidated European synthesis of CH4 and N2O emissions for the European Union and United Kingdom: 1990–2017 A. Petrescu et al. 10.5194/essd-13-2307-2021
- A conjugate BFGS method for accurate estimation of a posterior error covariance matrix in a linear inverse problem Y. Niwa & Y. Fujii 10.1002/qj.3838
- Estimation of fire-induced carbon emissions from Equatorial Asia in 2015 using in situ aircraft and ship observations Y. Niwa et al. 10.5194/acp-21-9455-2021
- Near-real-time estimation of fossil fuel CO2 emissions from China based on atmospheric observations on Hateruma and Yonaguni Islands, Japan Y. Tohjima et al. 10.1186/s40645-023-00542-6
- Development of the MIROC-ES2L Earth system model and the evaluation of biogeochemical processes and feedbacks T. Hajima et al. 10.5194/gmd-13-2197-2020
- The consolidated European synthesis of CO2 emissions and removals for the European Union and United Kingdom: 1990–2020 M. McGrath et al. 10.5194/essd-15-4295-2023
- Global Carbon Budget 2020 P. Friedlingstein et al. 10.5194/essd-12-3269-2020
- The Southern Ocean Carbon Cycle 1985–2018: Mean, Seasonal Cycle, Trends, and Storage J. Hauck et al. 10.1029/2023GB007848
- Estimated regional CO2 flux and uncertainty based on an ensemble of atmospheric CO2 inversions N. Chandra et al. 10.5194/acp-22-9215-2022
- Assessment of methane emissions from oil, gas and coal sectors across inventories and atmospheric inversions K. Tibrewal et al. 10.1038/s43247-023-01190-w
- Multiscale assessment of North American terrestrial carbon balance K. Foster et al. 10.5194/bg-21-869-2024
- Greenhouse gases Observing SATellite 2 (GOSAT-2): mission overview R. Imasu et al. 10.1186/s40645-023-00562-2
- Comparing national greenhouse gas budgets reported in UNFCCC inventories against atmospheric inversions Z. Deng et al. 10.5194/essd-14-1639-2022
- Increasing terrestrial ecosystem carbon release in response to autumn cooling and warming R. Tang et al. 10.1038/s41558-022-01304-w
- An Assessment of CO2 Uptake in the Arctic Ocean From 1985 to 2018 S. Yasunaka et al. 10.1029/2023GB007806
- National CO2 budgets (2015–2020) inferred from atmospheric CO2 observations in support of the global stocktake B. Byrne et al. 10.5194/essd-15-963-2023
- Detection of fossil-fuel CO2 plummet in China due to COVID-19 by observation at Hateruma Y. Tohjima et al. 10.1038/s41598-020-75763-6
- Estimation of CH4 emissions from the East Siberian Arctic Shelf based on atmospheric observations aboard the R/V Mirai during fall cruises from 2012 to 2017 Y. Tohjima et al. 10.1016/j.polar.2020.100571
- The greenhouse gas observation mission with Global Observing SATellite for Greenhouse gases and Water cycle (GOSAT-GW): objectives, conceptual framework and scientific contributions H. Tanimoto et al. 10.1186/s40645-025-00684-9
- The Global Methane Budget 2000–2017 M. Saunois et al. 10.5194/essd-12-1561-2020
- Global Carbon Budget 2021 P. Friedlingstein et al. 10.5194/essd-14-1917-2022
Discussed (preprint)
Latest update: 04 Feb 2025
Short summary
A new 4D-Var inversion system based on the icosahedral grid model, NICAM, is introduced and tested. Adding to the offline forward and adjoint models, this study has introduced the optimization method of POpULar; it does not require difficult decomposition of a matrix that establishes the correlation among the prior flux errors. In identical twin experiments of atmospheric CO2 inversion, the system successfully reproduces the spatiotemporal variations of the surface fluxes.
A new 4D-Var inversion system based on the icosahedral grid model, NICAM, is introduced and...
