一个区域耦合模式在不同分辨率下对台风“山神”的数值模拟  

A Coupled Regional Climate Model Simulation of Typhoon Son-Tinh with Increased Horizontal Resolutions

作　　者：万修全[1,2] 马伟伟[1] 吴德星[1,2] 李明悝[2] 

机构地区：[1]中国海洋大学海洋环境学院,山东青岛266100 [2]中国海洋大学物理海洋教育部重点实验室,山东青岛266100

出　　处：《中国海洋大学学报（自然科学版）》2015年第3期1-9,共9页Periodical of Ocean University of China

基　　金：国家自然科学基金面上项目(41276013);留学归国人员科研启动基金项目(教外司留2012-1707号);高等学校博士学科点专项科研基金项目(20110132130001);国家重点基础研究发展计划项目(2014CB7450001)资助

摘　　要：数值模式是台风研究的主要技术手段之一,但是目前数值模拟的台风强度普遍难以达到实际的强度。本文利用1个高分辨率区域海气耦合模式,以HYCOM同化数据以及NCEP FNL1(°)×1(°)再分析资料为模式,提供初始边界条件,对台风"山神"进行了多组不同水平分辨率下的耦合、非耦合模拟实验。初步证明:适当提高水平分辨率能够改善台风中心热通量等的模拟,进而改善台风路径的模拟效果,并显著提升模拟台风的最大强度;通过耦合、非耦合实验组证明,提升水平分辨率可改善海气耦合对台风强度模拟的负面效应,并分析了在特殊海洋涡旋结构下海洋对台风"山神"的响应过程,包括台风引起的路径右侧海表温度冷异常、相应的不对称环流场以及中尺度冷涡的增强与合并等过程。Numerical model is one of the main means to study typhoon process,and how to improve the precision of typhoon simulation has become more important.Although considerable progress has been made in our understanding of the dynamic and thermodynamic mechanisms of typhoon process,there is still long way to go to simulate and predict typhoon in reality.Based on a regional coupled model developed recently in Ocean University of China,we set up a series of numerical experiments to simulate typhoon Son-Tinh occurred in South China Sea in 2012 with increased horizontal model resolutions.The NCEP FNL Operational Global Analysis data and HYCOM Global Analysis data are applied as initial and boundary conditions to all the experiments.The results indicate that air-sea coupling and higher resolution can improve the model capability to simulate typhoon process.The oceanic responses to typhoon are also discussed.

关 键 词：台风“山神” 区域耦合模式 水平分辨率 南海 

分 类 号：P435[天文地球—大气科学及气象学]