Numerical Studies of Mesoscale Convective Systems Using a Cloud-Resolving Model

使用云解析模型进行中尺度对流系统的数值研究

• 批准号: 14340139
• 负责人: TSUBOKI Kazuhisa
• 金额: $ 8万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14340139/
• 关键词: mesoscale system; numerical model; cloud; Baiu front; simulation; multi-scale structure; Earth Simulator; heavy rainfall; データ同化; レーダー

The Baiu season in East Asia is characterized by a very humid climate. In the area, long-lasting and intense precipitation system occasionally develop and cause a heavy rainfall. They are referred to as a mesoscale convective system. In this study, we performed numerical simulation experiments of mesoscale convective systems using CReSS (the Cloud Resolving Storm Simulator) in collaboration with researchers of Taiwan and Korea.In 2002, we improved CReSS ; map projection capability, improvement of the lateral boundary conditions, assimilation of Doppler radar data. Using the improved CReSS, we performed daily weather prediction experiment and simulation experiments of mesoscale convective systems in warm season. We also invited researchers of Taiwan and Korea and made collaborative experiments.In 2003, we performed optimization of CReSS to the Earth Simulator and evaluated its performance. The result showed that vector operation ratio is 99.4 %, parallel operation ratio is 99.985 % and … More sustained efficiency 33 %. Using CReSS on the Earth Simulator, we performed numerical experiments of multitscale Baiu frontal lows, the localized heavy rainfall in Minamata City, a typhoon and snow band cloud over the Sea of Japan.The experiment of the Minamata localized heavy rainfall was performed with the horizontal resolution of 500m using 120 nodes (960CPUs) of the Earth Simulator. The result showed detailed structure of individual convective cells and overall structures of the rainfall system. The multi-scale structures of the precipitation system associated with the Baiu front were also well simulated. The experiment of snow cloud band showed the formation and development of cloud bands or cloud streets over the sea. We also performed the prediction experiment of heavy rainfall caused by Typhoon RUSA and showed that the spiral band intensifies when the typhoon comes to the southern Korean Peninsula. These results show that computation using the cloud resolving model is important for the accurate simulation of a heavy rainfall. Less

东亚的Baiu季节的特征是非常潮湿的气候。在该地区，持久和强烈的精度系统偶尔会发展并引起大雨。它们被称为中尺度对流系统。在这项研究中，我们与台湾和韩国的研究人员合作，使用CRESS（Cloud Resolving Storm Simulator）对中尺度对流系统进行了数值模拟实验。我们改善了CRESS；地图投影能力，横向边界条件的改善，多普勒雷达数据的同化。使用改进的CRESS，我们在温暖季节对中尺度对流系统进行了每日天气预测实验和模拟实验。我们还邀请了台湾和韩国的研究人员，并进行了协作实验。在2003年，我们对CRESS进行了优化，对地球模拟器进行了优化，并评估了其性能。结果表明，矢量运行率为99.4％，平行操作比率为99.985％，并且……持续效率更高33％。我们使用地球模拟器上的CRESS进行了多尺度Baiu额叶低点的数值实验，Minamimata City的本地大降雨，日本海洋上的台风和雪带云。Minamata的实验局部的大降雨局部，使用120 nodes（960 node）（960 cppus）进行了500m的水平分辨率，以500m的水平分辨率进行。结果显示了个体对流细胞和降雨系统的整体结构的详细结构。与BAIU前部相关的降水系统的多尺度结构也进行了充分模拟。雪云带的实验显示了海上云带或云街的形成和发展。我们还进行了由台风RUSA引起的大降雨的预测实验，并表明当台风来到韩国半岛时，螺旋带会加剧。这些结果表明，使用云解析模型的计算对于准确模拟大雨非常重要。较少的

项目成果

Kazuhisa Tsuboki: "Numerical experiments of heavy rain using the Cloud Resolving Storm Simulator."Proc.of the International Conference on High-Impact Weather and Climate. 122-125 (2004)

Kazuhisa Tsuboki：“使用云解析风暴模拟器进行暴雨数值实验。”高影响天气和气候国际会议记录。

Tsuboki, K., T.Asai: "The Multi-scale Structure and Development Mechanism of Mesoscale Cyclones over the Sea of Japan in Winter"Journal of the Meteorological Society of Japan. (掲載予定).

Tsuboki, K.，T.Asai：《冬季日本海上空中尺度气旋的多尺度结构与发展机制》，日本气象学会会刊（待出版）。

Tsuboki, K, A.Sakakibara: "Large-scale parallel computing of Cloud Resolving Storm Simulator."High Performance Computing, Springer, H.P.Zima et al.Eds. 243-259 (2002)

Tsuboki, K, A.Sakakibara：“云解析风暴模拟器的大规模并行计算”。高性能计算，Springer、H.P.Zima 等人编。

Liu.A.Q., G.W.K.Moore, K.Tsuboki, I.A.Renfrew: "A high-resolution simulation of convective roll clouds during a cold-air outbreak"Geophysical Research Letters. 31(印刷中). (2004)

Liu.A.Q.、G.W.K.Moore、K.Tsuboki、I.A.Renfrew：“冷空气爆发期间对流卷云的高分辨率模拟”地球物理研究快报 31（印刷中）。

Tsuboki, K., A.Sakakibara: "Large-scale parallel computing of Cloud Resolving Storm Simulator."High Performance Computing. 243-259 (2002)

Tsuboki, K., A.Sakakibara：“云解析风暴模拟器的大规模并行计算”。高性能计算。