[A-AS02] Evolution of Global Environmental Research based on Atmospheric Vertical Motions

[AAS02-12] Evaluation of hydrometeors and their relations to vertical motions in numerical models using the dual-polarization Doppler weather radars under the ULTIMATE project

*Masaki Satoh¹, Shuhei Matsugishi¹, Woosub Roh¹, Yasutaka Ikuta², Naomi Kuba¹, Tatsuya Seiki³, Tempei Hashino⁴, Hajime Okamoto⁵ (1.Atmosphere and Ocean Research Institute, The University of Tokyo, 2.Metrological Research Institute, 3.Japan Agency for Marine-Earth Science and Technology, 4.Kouchi University of Technology, 5.Research Institute for Applied Mechanics, Kyushu University)

Keywords:ULTIMATE, cloud microphysics, EarthCARE, NICAM, asuca, vertical motion

We propose a collaboration analysis study involving numerical models and observation data over the Tokyo metropolitan area, called the ULTIMATE (ULTra-sIte for Measuring Atmosphere of Tokyo Metropolitan Environment) project. It evaluates cloud microphysics schemes of numerical models using extensive observation data in the Tokyo area. We have a variety of remote sensing and in-situ data over the Tokyo area for operational and research purposes, particularly by enhancing observations for ground validation of the EarhCARE satellite, which is set to launch in 2023. This study focuses on using the dual-polarization Doppler weather radar, which is now operational by the Japan Meteorological Agency, to evaluate hydrometeors simulated by numerical models. In terms of numerical models, we will consider using and comparing multi-models with various cloud microphysics schemes, including NICAM (Non-hydrostatic Icosahedral Atmospheric Model) and the regional model of the Japan Meteorological Agency “asuca”, together with SCALE (Scalable Computing for Advanced Library and Environment) developed by RIKEN. We found discrepancies in the mean size of raindrops and the graupel between the observations and the simulations. We investigate how these differences are related to the vertical motion of the hydrometeors and vertical winds of the atmosphere.