EGU2020-12626
https://doi.org/10.5194/egusphere-egu2020-12626
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Introduction to A Regional Coupled Forecasting System

Mingkui Li1,2 and Shaoqing Zhang1,2
Mingkui Li and Shaoqing Zhang
  • 1Key Laboratory of Physical Oceanography, MOE, China; Ocean University of China, Qingdao, China (mkli@ouc.edu.cn)
  • 2Pilot National Laboratory for Marine Science and Technology (QNLM), Qingdao, China

A regional coupled prediction system for the Asia-Pacific area (AP-RCP) has been established. The AP-RCP system consists of WRF-ROMS (Weather Research and Forecast and Regional Ocean Model System) coupled models combined with local observing information through dynamically downscaling coupled data assimilation. The system generates 18-day atmospheric and oceanic environment forecasts on a daily quasi-operational schedule at Qingdao Pilot National Laboratory for Marine Science and Technology (QNLM). The AP-RCP system mainly includes 2 different coupled model resolutions: 27km WRF coupled with 9km ROMS, and 9km WRF coupled with 3km ROMS. This study evaluates the impact of enhancing coupled model resolution on the extended-range forecasts, focusing on forecasts of typhoon onset, and improved precipitation and typhoon intensity forecasts. Results show that enhancing coupled model resolution is a necessary step to realize the extended-range predictability of the atmosphere and ocean environmental conditions that include a plenty of local details. The next challenges include improving the planetary boundary physics and the representation of air-sea and air-land interactions when the model can resolve the kilometer or sub-kilometer processes.

How to cite: Li, M. and Zhang, S.: Introduction to A Regional Coupled Forecasting System, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-12626, https://doi.org/10.5194/egusphere-egu2020-12626, 2020