海洋飞沫方案改进对台风“威马逊”强度预报的影响
发布时间：2018-11-01 10:49
【摘要】：本文采用分粒径段组合方式改进海气耦合模式海洋飞沫方案,并利用耦合模式对1409号台风"威马逊"进行数值模拟,分析了海洋飞沫方案改进对台风结构、强度以及海气动量通量、热量通量模拟结果的影响。结果显示,耦合模式中海洋飞沫方案可通过改变海表面粗糙度影响海气动量与热量通量;海洋飞沫还可以通过沫滴向大气输送感热和水汽而直接影响海气热通量,进一步影响台风的强度。模拟结果显示改进后海洋飞沫方案的台风强度更接近观测。改进海洋飞沫方案后粗糙度的计算结果小于原始方案,相应地海气热通量以及下垫面耗散作用也弱于后者,海表面风场是海气热交换与下垫面耗散共同作用的结果。
[Abstract]:In this paper, the ocean droplet scheme of the air-sea coupling model is improved by the combination of particle size segments, and the numerical simulation of typhoon No. 1409 "Wilmson" is carried out by using the coupling model, and the improvement of the typhoon structure by the ocean droplet scheme is analyzed. The influence of intensity and momentum flux and heat flux of sea and air on simulation results. The results show that the ocean droplet scheme can affect the aerodynamic and heat flux of the sea by changing the roughness of the sea surface in the coupled model. Ocean droplets can also directly affect the air and sea heat flux through droplet transport of sensible heat and water vapor to the atmosphere and further affect the intensity of typhoon. The simulation results show that the typhoon intensity of the improved ocean droplet scheme is closer to observation. The calculated results of the improved ocean droplet scheme are smaller than those of the original scheme, and the corresponding heat flux and the dissipation of the underlying surface are weaker than the latter. The wind field of the sea surface is the result of the interaction of the heat exchange between the sea and the air and the dissipation of the underlying surface.
【作者单位】： 中国气象局上海台风研究所;
【基金】：国家重点基础研究发展计划(973)项目;2013CB430305号 “全球变化与海气相互作用”专项项目;GASI-IPOVAI-04号 中国气象局上海台风研究所基本科研业务专项项目;2016JB12号 上海市气象局科技开发项目;YJ201603号
【分类号】：P732;P457.8
本文编号：2303686
[Abstract]:In this paper, the ocean droplet scheme of the air-sea coupling model is improved by the combination of particle size segments, and the numerical simulation of typhoon No. 1409 "Wilmson" is carried out by using the coupling model, and the improvement of the typhoon structure by the ocean droplet scheme is analyzed. The influence of intensity and momentum flux and heat flux of sea and air on simulation results. The results show that the ocean droplet scheme can affect the aerodynamic and heat flux of the sea by changing the roughness of the sea surface in the coupled model. Ocean droplets can also directly affect the air and sea heat flux through droplet transport of sensible heat and water vapor to the atmosphere and further affect the intensity of typhoon. The simulation results show that the typhoon intensity of the improved ocean droplet scheme is closer to observation. The calculated results of the improved ocean droplet scheme are smaller than those of the original scheme, and the corresponding heat flux and the dissipation of the underlying surface are weaker than the latter. The wind field of the sea surface is the result of the interaction of the heat exchange between the sea and the air and the dissipation of the underlying surface.
【作者单位】： 中国气象局上海台风研究所;
【基金】：国家重点基础研究发展计划(973)项目;2013CB430305号 “全球变化与海气相互作用”专项项目;GASI-IPOVAI-04号 中国气象局上海台风研究所基本科研业务专项项目;2016JB12号 上海市气象局科技开发项目;YJ201603号
【分类号】：P732;P457.8
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