TY - JOUR A1 - Niwa, Y. A1 - Fujii, Y. A1 - Sawa, Y. A1 - Iida, Y. A1 - Ito, A. A1 - Satoh, M. A1 - Imasu, R. A1 - Tsuboi, K. A1 - Matsueda, H. A1 - Saigusa, N. T1 - 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 JO - Geosci. Model Dev. J1 - GMD VL - 10 IS - 6 SP - 2201 EP - 2219 Y1 - 2017/06/15 PB - Copernicus Publications SN - 1991-9603 UR - https://gmd.copernicus.org/articles/10/2201/2017/ L1 - https://gmd.copernicus.org/articles/10/2201/2017/gmd-10-2201-2017.pdf DO - 10.5194/gmd-10-2201-2017 ER -