[M-SD35] 将来の衛星地球観測

[MSD35-P09] ドップラー雲レーダと多視野角・高スペクトル分解・ 偏光ドップラーライダによる雲・エアロゾル・鉛直流観測ミッション

*西澤 智明¹、岡本 創²、鈴木 健太郎³、神 慶孝¹、石井 昌憲⁴、富田 英一⁵ (1.国立環境研究所、2.九州大学応用力学研究所、3.東京大学大気海洋研究所、4.東京都立大学、5.宇宙航空研究開発機構)

キーワード：雲レーダ、ライダ、雲、エアロゾル、鉛直速度

We proposed a synergy space-borne observation mission using a 94GHz Doppler cloud radar and a high spectral resolution lidar (HSRL) with doppler, multi-field-of-view, and depolarization measurement functions to study clouds, aerosols and convection. Expected geophysical products include (1) microphysics of clouds, aerosols and precipitations, (2) fall velocity of clouds, rain and snow particles, and (3) air motion in cloud, above clouds and in clear sky condition. A two-wavelength (1064, 532nm) lidar system with multiple functions is implemented. HSRL function is introduced for 532nm to estimate particle optical properties without uncertainty. Polarization capability sensitive to particle shape is implemented for 532nm and 1064nm. Direct detection method using HSRL technique is used to estimate Doppler velocity at 532nm. Both 94GHz cloud radar and lidar are expected to have a function to observe Doppler velocity at multiple directions, including nadir and off-nadir directions, to derive three-dimensional air motion inside clouds as well as in clear sky, respectively. The HSRL and polarization functions distinguishes cloud particle type and aerosols. By adding the multiple-field-of-view function to the lidar, information from relatively thick clouds can be obtained. Since the 94GHz cloud radar can observe inside of the clouds and lidar can measure aerosols and clouds, it will be an extended version of space-mission to CloudSat and CALIPSO launched in 2006 and EarthCARE satellite in 2023. The mission will also serve to construct long continuous records of clouds and aerosols for climate change studies with CloudSat, CALIPSO, EarthCARE and future missions such as AOS (Atmosphere Observing System).