Dynamical downscaling product over the Third Pole Region

Introduction

The aim of this project is to provide a high resolution regional climate downscaling product (9 km for east Asia with a focus on the Third Pole region and 3 km for south and southeast Asia).

To do this, the fifth generation ECMWF atmospheric reanalysis of the global climate, ERA5 v5, has been dynamically downscaled to the target region since 1979, using the Weather Research and Forecasting (WRF) Model version 3.7.1. This work is led by Deliang Chen and Tinghai Ou.

Model domain

The main domain, with a 9 km horizontal resolution, covers a broad region over East Asia, centered over the Third Pole Region. A regional focus is over southeast Asia, where an inner domain with 3 km horizontal resolution is nested to the 9 km simulation.

Reference

Ou, T., D. Chen, J. Tang, C. Lin, X. Wang, J. Kukulies, and H.-W. Lai, 2023: Wet bias of summer precipitation in the northwestern Tibetan Plateau in ERA5 is linked to overestimated lower-level southerly wind over the plateau. Climate Dynamics. DOI: 10.1007/s00382-023-06672-3.

Ou, T., D. Chen, X. Chen, C. Lin, K. Yang, H.-W. Lai, F. Zhang, 2020: Simulation of summer precipitation diurnal cycles over the Tibetan Plateau at the gray-zone grid spacing for cumulus parameterization. Climate Dynamics, DOI:10.1007/s00382-020-05181-x.

Sun, H., F. Su, Z. He, T. Ou, D. Chen, Z. Li, Y. Li, 2021: Hydrological evaluation of high-resolution precipitation estimates from the WRF model in the Third Pole river basins. Journal of Hydrometeorology. DOI: 10.1175/JHM-D-20-0272.1.