[M-SD35] Future Missions of Satellite Earth Observation

[MSD35-05] Cloud-Aerosol-Wind-Observation Mission by using Doppler Cloud Profiling Radar and Multi-FOV-High-Spectral-Resolution-Polarization-Doppler Lidar

Hajime Okamoto², Kentaroh Suzuki³, *Tomoaki Nishizawa¹, Yoshitaka Jin¹, Shoken Ishii⁴, Eiichi Tomita⁵ (1.National Institute for Environmental Studies, 2.Research Institute for Applied Mechanics, Kyushu University, 3.Atmosphere and Ocean Research Institute, University of Tokyo, 4.Tokyo Metropolitan University, 5.Japan Aerospace Exploration Agency)

Keywords:cloud profiling radar, lidar, cloud, aerosol, vertical motion

We propose 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. Research using these products should lead to qualitative improvements in the accuracy of climate change predictions and extreme event predictions through validation and improvement in the elementary processes of cloud microphysics and convective parameterization. Qualitative improvements in the assessment of atmospheric environmental effects of aerosols are also promised. 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 measurement 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. Combined HSRL and polarization measurements distinguish between complex cloud particle and aerosol types. By adding the multiple-field-of-view function to the lidar, information from relatively thick clouds can be obtained. The 94GHz cloud radar can observe inside of the clouds and the lidar can measure aerosols and clouds, thus this mission will be an extended version of space-mission to CloudSat and CALIPSO launched in 2006 and EarthCARE in 2024. 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).