MPAS-A模式中不同积云对流参数化方案对西北太平洋台风模拟效果的影响  被引量:6

Influence of different cumulus convection parameterization schemes on the simulation of typhoon in the Northwest Pacific in MPAS-A

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作  者:高元勇 邢建勇[1] 陈耀登[2] GAO Yuan-yong;XING Jian-yong;CHEN Yao-deng(Key Laboratory of Research on Marine Hazards Forecasting,National Marine Environmental Forecasting Center,SOA,Beijing 100081 China;Nanjing University of Information Science&Technology,Nanjing 210000 China)

机构地区:[1]国家海洋环境预报中心国家海洋局海洋灾害预报技术研究重点实验室,北京100081 [2]南京信息工程大学,江苏南京210000

出  处:《海洋预报》2019年第5期10-18,共9页Marine Forecasts

基  金:国家重点研发计划(2016YFC1401704)

摘  要:利用MPAS-A模式,针对模式中的New-Tiedtke,Grell-Freitas和Kain-Fritsch 3种积云对流参数化方案,选取2016-2017年期间的10个西北太平洋台风个例,研究了不同积云对流参数化方案对西北太平洋台风路径与强度模拟效果的影响,并讨论了其影响的物理机制。试验结果表明:3种积云对流参数化方案对MPAS-A台风模拟效果存在一定差异,New-Tiedtke方案模拟的路径和强度总体效果与观测最接近。影响机制分析表明,不同积云对流参数化方案使得模拟西太副高的位置不同,即引导西北太平洋台风的环境气流不同是造成路径差异的原因;而不同积云对流参数化方案模拟的台风中心对流不稳定高度不同,即潜热输送和释放不同,是造成台风强度不同的原因。The MPAS-A model is used to study the influence of cumulus convective parameterization schemes on typhoon track and intensity prediction. These schemes include New-Tiedtke, Grell-Freitas and Kain-Fritsch. Ten western Pacific typhoons during the period 2016-2017 were selected as samples. And the physical mechanisms of the effects were discussed. The experimental results show that the three schemes have different effects on the MPAS-A typhoon simulation. The overall performance of the track and intensity of the New-Tiedtke scheme experiments is the closest to the observation. The analysis of the influence mechanism shows that the locations of the west Pacific subtropical high of different scheme experiments are different, that is, the difference of the ambient airflow that guides the typhoon in the northwestern Pacific causes the difference of the tracks;and the convective instability of the typhoon centers of those schemes are different, that is, the difference in latent heat transport and release causes the difference in typhoon intensity.

关 键 词:数值模式 MPAS 台风 积云对流参数化方案 物理机制 

分 类 号:P444[天文地球—大气科学及气象学]

 

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