Geoscientific Model Development
Geoscientific Model Development
GMD
Articles | Volume 16, issue 6
Articles | Volume 16, issue 6
https://doi.org/10.5194/gmd-16-1823-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gmd-16-1823-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 16, issue 6
Development and technical paper
 | 
31 Mar 2023
Development and technical paper |  | 31 Mar 2023

Estimation of CH4 emission based on an advanced 4D-LETKF assimilation system

Jagat S. H. Bisht, Prabir K. Patra, Masayuki Takigawa, Takashi Sekiya, Yugo Kanaya, Naoko Saitoh, and Kazuyuki Miyazaki

Supplement

https://doi.org/10.5194/gmd-16-1823-2023-supplement

Data sets

MIROC4-ACTM: Model setup, input and output data for CH4 LETKF (Bisht et al., GMD-D, 2022) J. S. H. Bisht, P. K. Patra, M. Takigawa, T. Sekiya, Y. Kanaya, N. Saitoh, and K. Miyazaki https://doi.org/10.5281/zenodo.7098323

Model code and software

Improved Chemical Tracer Simulation by MIROC4.0-based Atmospheric Chemistry-Transport Model (MIROC4-ACTM) (Version 1) Prabir K. Patra, Masayuki Takigawa, Shingo Watanabe, Naveen Chandra, Kentaro Ishijima, and Yousuke Yamashita https://doi.org/10.5281/zenodo.7274240

LETKF: CH4 data assimilation code, including the wrapper script to run the assimilation system J. S. H. Bisht, P. K. Patra, T. Sekiya, and K. Miyazaki https://doi.org/10.5281/zenodo.7127658

MIROC4-ACTM code for CH4 simulation J. S. H. Bisht, P. K. Patra, and M. Takigawa https://doi.org/10.5281/zenodo.7118365

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Short summary
In this study, we estimated CH4 fluxes using an advanced 4D-LETKF method. The system was tested and optimized using observation system simulation experiments (OSSEs), where a known surface emission distribution is retrieved from synthetic observations. The availability of satellite measurements has increased, and there are still many missions focused on greenhouse gas observations that have not yet launched. The technique being referred to has the potential to improve estimates of CH4 fluxes.
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