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基于MCT耦合器的WRF-POM区域海气耦合模式构建及应用
刘 武1, 杨成荫2, 李耀东3, 史小康3
1.中国人民解放军96631 部队;2.中国人民解放军93199 部队;3.北京航空气象研究所
摘要:
为研究区域海气耦合模式在中尺度海气相互过程中的应用, 利用MPI(Model Coupling Toolkit)并行通信技术, 构建了基于MCT 耦合器的WRF-POM并行区域海气耦合模式, 并利用该模式对台风“凤凰”进行了一系列的数值模拟试验。试验结果表明: 该耦合模式可以实现稳定高效的并行计算, 并较好地再现了台风“凤凰”的活动过程; 相对单一的大气模式, 耦合模式可以更加准确地模拟出台风“凤凰”的路径和强度, 其中不使用“Bogus方案”的耦合试验模拟效果最好, 其路径平均绝对误差相对控制试验和使用“Bogus方案”耦合试验分别减小了20.1%和72.5%, 强度的平均均方根误差则分别减小了41.4%和17.9%; 耦合模式还能较好地再现表层海洋对大气的响应特征: 台风大风使得表层流速显著增大, 强烈的“抽吸夹卷”效应使得低层较冷海水上翻, 海表温度降低, 混合层深度增加。
关键词:  区域海气耦合模式  数值模拟  台风  中尺度海气相互作用
DOI:10.11759/hykx20171014001
分类号:
基金项目:国家自然科学基金资助项目(41405135)
The development and application of the WRF-POM regional air-sea coupled model based on the MCT coupler
LIU Wu,YANG Cheng-yin,LI Yao-dong,SHI Xiao-kang
Abstract:
The objective of this paper was to study the application of a regional air-sea coupled model to mesoscale air-sea interactions. Based on the MCT (Model Coupling Toolkit)parallel communication technology (MPI), this paper developed the Weather Research and Forecasting Model/Princeton Ocean Model (WRF-POM) regional air-sea coupled model via the MCT coupler and used this model to carry out a series of numerical simulations on Typhoon “Fung-Wong”. The experimental results showed that the coupled model ran stably and efficiently. It also well-simulated Typhoon “Fung-Wong.” Compared with the single atmospheric model (WRF), the coupled equations more accurately simulated typhoon track and intensity. Compared with both the control experiment and the coupled experiment that used the “Bogus Schemes”, the coupled experiment that did not use the “Bogus Schemes” performed best. Its mean absolute error for storm path was reduced by 20.1% and 72.5% compared with the control and “Bogus Schemes” coupled experiments, respectively, and its average root mean square error for intensity was reduced by 41.4% and 17.9%, respectively. The coupled model could also accurately simulate the feedback systems between the top ocean layer and the atmosphere. For example, model output reflected strong typhoon winds increasing the velocity of the sea surface current, and demonstrated deepening of the mixed-layer and surface cooling through upwelling.
Key words:  regional air-sea coupled model  numerical simulation  typhoon  mesoscale ocean-air interaction
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