Due to COVID-19 situation, the original planned TAHOPE (Taiwan-Area Heavy rain experiment Observation and Prediction Experiment) will be postponed until May-August 2022. During 3-year TAHOPE Phase II study plan, we will use field campaign observations (e.g., wind profiler, dual-polarimetric radar, disdrometer, etc.) and numerical model simulations to discuss the evolution of raindrop size distributions and precipitating cloud microphysics, as well as mesoscale conditions and dynamical/physical mechanisms associated with heavy orographicprecipitation during the TAHOPE experiment. In addition, we will study two heavy rainfall events during two IOPs of the pre TAHOPE filed experiment: (1) an intense convective system moves onshore to central coast of Taiwan, bringing heavy precipitation during IOP 1 (30 May 2021); (2) Taiwan is under the influences of Mei-Yu frontal system to the north and TC CHOI-WAN to the south, heavy afternoon thunderstorms occurred over northern Taiwan and the Central Mountain Range. The roles of the large-scale and mesoscale conditions on theheavy afternoon thunder storm deserve further study. Through detailed observed analysis and model simulations (including microphysics and terrain sensitivity tests), we can approach all of the study goals.During TAHOPE/TAHOPE-Phase II experiment, we will investigate three kinds of low-level jets (synoptic-system-related low-level jet/SLLJ, barrier jet, and marine boundary layer jet/MBLJ) that could possible contribute to heavy rainfall over Taiwan: (1) the interaction between these low-level jets and terrain; (2) the relationship between them and the Mei-Yu system; (3) their impacts on the development and structure evolution of mesoscale convective systems associated with the Mei-Yu system and physical mechanisms of precipitation; (4)their change in the precipitating microphysics and thermal dynamical characteristics of boundary layer.
Status | Finished |
---|
Effective start/end date | 1/08/22 → 31/10/23 |
---|
In 2015, UN member states agreed to 17 global Sustainable Development Goals (SDGs) to end poverty, protect the planet and ensure prosperity for all. This project contributes towards the following SDG(s):