Predictability experiment of a severe convective event over the Korean Peninsula: Effect of the nesting method
Abstract
Impact of nesting method on simulation of severe convective event formed over Cheongju region, South Korea on 16 July 2017 was examined. Numerical experiments were conducted using Weather Research and Forecasting (WRF) model by employing both one-way (OW) and two-way (TW) nesting approaches. Advanced physics options from Korean Integrated Model (KIM) were considered for simulation. Quantitative analysis of model simulations against TRMM observations suggest that the nested domain simulation with TW interaction performs better than OW in simulating the rainfall associated with the system passage. Large-scale features, moisture and instability in the boundary layer favorable for convection are better simulated by the TW approach. Evaluation of model simulations with Automatic Weather Station (AWS) observations reveals that the local distribution of rainfall, temperature, and moisture at 2m are well represented in TW. It is demonstrated that both large-scale and local-scale features in the parent and nested domains of the TW simulation are better represented, and resulted in successful rainfall simulation. Interaction between parent and nested domains by feedback mechanism in the TW nesting method accounts the effects of multi-scale processes, and contributes to the improved representation of both synoptic and local-scale features in the convective environment.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2018
- Bibcode:
- 2018AGUFM.A54H..24A
- Keywords:
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- 3310 Clouds and cloud feedbacks;
- ATMOSPHERIC PROCESSESDE: 3314 Convective processes;
- ATMOSPHERIC PROCESSESDE: 3329 Mesoscale meteorology;
- ATMOSPHERIC PROCESSESDE: 3354 Precipitation;
- ATMOSPHERIC PROCESSES