阵风效应对冬季北太平洋涛动年际变化模拟效果的影响  

Impact of wind gustiness effect on simulation of interannual variation of North Pacific Oscillation in winter

作　　者：李忠贤[1] 何鹏[1] 倪东鸿[1] 曾刚[1] 邓伟涛[1] 

机构地区：[1]南京信息工程大学气象灾害预报预警与评估协同创新中心,江苏南京210044

出　　处：《大气科学学报》2014年第2期155-162,共8页Transactions of Atmospheric Sciences

基　　金：国家重点基础研究发展计划(973计划)项目(2013CB430202);国家自然科学基金资助项目(41205035);江苏省高校自然科学研究面上项目(13KJB170013);江苏省自然科学基金面上项目(BK20131431);江苏省高校"青蓝工程"

摘　　要：利用观测海温驱动NCAR CAM5模式进行了两组数值试验,对比分析了在CAM5模式海气湍流热通量参数化方案中引入阵风效应前后,模式对冬季NPO(North Pacific Oscillation,北太平洋涛动)年际变化模拟效果的差异。结果表明,考虑了阵风效应后,CAM5模式能较好地模拟冬季NPO的年际变化特征,模拟的1979—1999年冬季NPO指数序列与观测结果的相关系数由0.09提高到0.57;热带东太平洋海表温度异常通过影响海表湍流热通量异常,对冬季NPO年际变化产生影响;引入阵风效应后,模式对热带东太平洋海表湍流热通量异常的模拟结果更趋合理,从而使得模式可以较好地模拟出冬季NPO的年际变化。Using the observational sea surface temperature （SST） data, the interannual variation of winter North Pacific Oscillation （NPO） is simulated by the National Center for Atmospheric Research （NCAR） Community Atmosphere Model Version 5 （CAM5） with or without the inclusion of wind gustiness effect in the parameterization scheme of air-sea turbulent heat fluxes.Results show that, with the inclusion of wind gustiness effect, the interannaul variation of winter NPO can be reasonably reproduced by the model, and the correlation coefficient between 1979--1999 observed and simulated NPO is increased from 0.09 to 0. 57.The SST anomaly in the eastern tropical Pacific plays an important role on the interannual variation of winter NPO, by influencing the air-sea turbulent heat fluxes.By considering the wind gustiness effect in the parameterization scheme of air-sea turbulent heat fluxes in CAM5, the simulating capability of interannual variation of sea surface turbulent heat fluxes in the eastern tropical Pacific is significantly improved, leading to the simulations of interannual variation of winter NPO be improved significantly.

关 键 词：北太平洋涛动 阵风效应 年际变化 数值模拟 

分 类 号：P434[天文地球—大气科学及气象学] P732