[A-CG46] [EE] 衛星による地球環境観測

[ACG46-42] 衛星搭載ドップラー風ライダーを用いた観測システム実験(OSSE)の初期結果

*岡本 幸三^1,2、石橋 俊之¹、石井 昌憲²、Baron Philippe²、蒲生 京佳⁴、田中 泰宙¹、久保田 拓志³ (1.気象研究所、2.情報通信研究機構、3.宇宙航空研究開発機構、4.富士通FIP)

キーワード：data assimilation, OSSE, Doppler wind lider (DWL), global numerical weather prediction

Space-based Doppler Wind Lidar (DWL) can provide global wind profiles that are significantly beneficial for the numerical weather prediction. The feasibility of DWLs has been investigated using OSSE. Our DWL OSSE features a realistic simulation of Lidar scattering from 3-dimentional, hourly aerosol that is consistent to wind field and created by a full-brown lidar simulator. The aerosol is produced by a global aerosol chemical transport model developed by MRI in which wind field is nudged with pseudo-truth. The pseudo-truth atmospheric field is generated from the Sensitivity Observing System Experiment (SOSE) approach. Simulated line-of-sight wind speeds are assimilated with the four-dimensional variational (4D-Var) scheme based on the operational global data assimilation system at JMA. We have conducted OSSEs for DWL onboard a satellite in a polar and low-inclination orbiting satellite, showing forecast improvement by assimilating DWL with inflated observation errors. The preliminary results from the two measurement strategies will be presented.