区域气候模式在不同分辨率下对西北太平洋热带气旋生成气候特征的比较研究

古月; 陈葆德; 董广涛

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DOI:10.7519/j.issn.1000-0526.2013.02.002

气象:2013,39(2):137-145

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区域气候模式在不同分辨率下对西北太平洋热带气旋生成气候特征的比较研究

古月^1,2, 陈葆德³, 董广涛⁴

(1.南京信息工程大学大气科学学院，南京 210044;2.北京市气象台，北京 100089;3.中国气象局上海台风研究所，上海 200030;4.上海市气候中心，上海 200030)

Comparison of Tropical Cyclogenesis Features over the Northwestern Pacific Simulated by Regional Climate Model with Different Resolutions

GU Yue^1,2, CHEN Baode³, DONG Guangtao⁴

(1.College of Atmospheric Sciences, Nanjing University of Information Science and Technology, Nanjing 210044;2.Beijing Meteorological Observatory, Beijing 100089;3.Shanghai Typhoon Institute of China Meteorological Administration, Shanghai 200030;4.Shanghai Climate Center, Shanghai 200030)

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投稿时间：2012-03-07 修订日期：2012-09-22

中文摘要: 利用RegCM3区域气候模式，试验研究了15、30、45和60 km 4个分辨率下西北太平洋热带气旋的生成特征。结果表明，RegCM3模式对西北太平洋热带气旋生成的模拟能力受分辨率的影响。分辨率的简单提高，并不一定会使模式的模拟能力有所改善。模式在30 km分辨率下对西北太平洋热带气旋生成频数及频数变化的模拟能力最强，在60 km分辨率下对西北太平洋热带气旋生成频数空间分布的模拟能力最强，在15 km分辨率下对西北太平洋热带气旋生成频数、频数空间分布及频数变化的模拟能力最弱。对比分析不同分辨率下热带气旋的生成过程表明，热带气旋生成前期，β中尺度涡旋没有发生合并，对流层中低层水汽含量不足是导致模式在15 km分辨率下模拟热带气旋生成频数较差的主要原因。

中文关键词: 气旋生成， RegCM3，分辨率，西北太平洋

Abstract:The tropical cyclogenesis features over the Northwestern Pacific simulated by Regional Climate Model Version 3.1 (RegCM3) with 15 km, 30 km, 45 km and 60 km resolutions are compared. It is found that the capability of RegCM3 on tropical cyclogenesis simulation over the Northwestern Pacific is influenced by resolution. The increase of resolution cannot always lead to the improvement of the simulation result. RegCM3 with 30 km resolution has the best capability of simulation on tropical cyclone (TC) genesis number and its variation. The capability of simulation by RegCM3 with 45 km resolution on TC genesis number and its variation is a little worse than RegCM3 with 30 km resolution. RegCM3 with 60 km resolution has the best capability of simulation on TC genesis position. RegCM3 with 15 km resolution has the worst capability of simulation on TC genesis number, TC genesis position and the variation of TC genesis number. The processes of TC genesis simulated by RegCM3 with different resolutions are compared. The results are as follows: The vortices cannot merger because of the small scale of them and the far distance between them. It may result in the decrease of TC genesis number in the simulation of RegCM3 with 15 km resolution. Much dry air involves in wet air before TC genesis and then reduces the water vapor and condensation latent heat release in the mid and lower troposphere. It may also result in the reduction of TC genesis number in the simulation of RegCM3 with 15 km resolution.

keywords: cyclogenesis, RegCM3 model, resolution, Northwestern Pacific

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基金项目:国家重点基础研究发展规划项目(2012CB956003)资助

作者	单位
古月	南京信息工程大学大气科学学院，南京 210044 北京市气象台，北京 100089
陈葆德	中国气象局上海台风研究所，上海 200030
董广涛	上海市气候中心，上海 200030

Author Name	Affiliation
GU Yue	College of Atmospheric Sciences, Nanjing University of Information Science and Technology, Nanjing 210044 Beijing Meteorological Observatory, Beijing 100089
CHEN Baode	Shanghai Typhoon Institute of China Meteorological Administration, Shanghai 200030
DONG Guangtao	Shanghai Climate Center, Shanghai 200030

引用文本：
古月,陈葆德,董广涛,2013.区域气候模式在不同分辨率下对西北太平洋热带气旋生成气候特征的比较研究[J].气象,39(2):137-145.
GU Yue,CHEN Baode,DONG Guangtao,2013.Comparison of Tropical Cyclogenesis Features over the Northwestern Pacific Simulated by Regional Climate Model with Different Resolutions[J].Meteor Mon,39(2):137-145.