Representation of Extreme Weather during a Typhoon Landfall in Regional Meteorological Simulations: A Model Intercomparison Study for Typhoon Songda (2004)
Representation of Extreme Weather during a Typhoon Landfall in Regional Meteorological Simulations: A Model Intercomparison Study for Typhoon Songda (2004)
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DOI：
10.3178/hrl.4.1
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发表时间：
2010
影响因子：
1.1
通讯作者：
Y. Oku;T. Takemi;H. Ishikawa;S. Kanada;M. Nakano
中科院分区：
文献类型：
--
作者：
Y. Oku;T. Takemi;H. Ishikawa;S. Kanada;M. Nakano
：描述了非静力模式（NHM）和天气研究与预报模式（WRF）在1 km分辨率区域模拟中对2004年“桑达”台风登陆期间极端天气的表现，并对两种云分辨模式进行了比较。两个模式都使用相同的NHM 5 km网格输出作为初始和边界条件，成功地再现了观测到的台风路径和强度。地面风的比较表明，WRF评估更多的增强极端比NHM;另一方面，代表性的天气预报表明，每小时和累积天气预报模拟的两个模式的极端评估不同。两个模型之间的模型地形略有差异，虽然由相同的地形数据集产生，显着影响每个模型中的极端表示。应该认识到，不仅模式数值和物理的差异，而且地形再现的微小变化也会导致极端天气的表现方式的差异。
: The representations of extreme weather during the landfall of Typhoon Songda (2004) in regional simulations at 1-km resolution are described and compared for two cloud-resolving models: Non-hydrostatic Model (NHM) and the Weather Research and Forecasting model (WRF). Both models, using the same 5-km-mesh outputs from NHM as their initial and boundary condi- tions, successfully reproduced the observed typhoon track and intensity. The comparison of surface winds indicated that WRF evaluates more enhanced extremes than NHM; on the other hand, the representations of rainfalls indicated that the extremes of hourly and accumulated rainfalls simulated by the two models are evaluated differently. Slight differences in the model topography between the two models, though produced by the same terrain dataset, were shown to significantly affect the representations of the extremes in each model. It should be recognized that not only the differences in model numerics and physics but also slight changes in the reproduction of topography induce differences in the representations of extreme weather.