[A-AS02] 大気の鉛直運動を基軸とした地球環境学の新展開

[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

*佐藤 正樹¹、松岸 修平¹、Woosub Roh¹、幾田 泰酵²、久芳 奈遠美¹、清木 達也³、端野 典平⁴、岡本 創⁵ (1.東京大学大気海洋研究所、2.気象研究所、3.海洋研究開発機構、4.高知工科大学、5.九州大学応用力学研究所)

キーワード：ULTIMATE、雲物理、EarthCARE、NICAM、asuca、鉛直運動

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.