Category: Hydro-Climate Symposium

394665 - Reconstruction of Historical Watershed-Scale Precipitation over Ishikari River Basin, Japan by Means of Dynamical Downscaling

Tuesday, Jun 5
8:30 AM – 5:30 PM

The purpose of this study is to reconstruct atmospheric conditions over Ishikari River Basin (IRB) in Japan during a historical period. Although observation data of near-surface atmospheric variables including precipitation are available for at least several decades in Japan, they are not sufficient to analyze causes of precipitation over IRB. Therefore, in this study, atmospheric conditions over IRB were reconstructed by means of dynamical downscaling with a regional climate model. As a regional climate model, Weather and Research Forecast (WRF) model was employed. ERA-Interim reanalysis data were used for initial and boundary conditions of WRF. As the first step of the reconstruction, the model options of WRF were configured by try-and-error. After the configuration, atmospheric conditions over the IRB were reconstructed during 1980-2011. Then, basin-average precipitation over IRB between the reconstructed results and the corresponding observations for the whole period were compared for the validation. This presentation shows the configuration and validation results as the preliminary results.

Co-Authors: Kenji Tanaka, Gokasho,Uji,Kyoto 611-0011 Japan – Kyoto University

Kei Ishida

Assistant Professor
Kumamoto University
Kumamoto, Japan