平均经圈环流质量流函数两种计算方案的比较  

Comparison of Two Computational Schemes of Mass Stream Function of Zonally Mean Meridional Circulation

作　　者：顾兴军[1] 王盘兴[1] 李丽平[1] 

机构地区：[1]南京气象学院大气科学系,江苏南京210044

出　　处：《南京气象学院学报》2004年第1期11-19,共9页Journal of Nanjing Institute of Meteorology

基　　金：国家自然科学基金资助项目(40233037)

摘　　要：质量流函数(ψ)是直观、定量描述纬向平均经圈环流的物理量。用相同格点网、相同资料(1958—1998年NCEP/NCAR再分析资料)比较了迭代方案、叠加方案求得ψ在描述平均经圈环流气候态、强ElNino年异常态以及Hadley环流双层结构时的异同。比较表明,二者计算结果间不存在明显差异;但叠加方案只用v资料,计算也简单。Mass stream functions(ψ) is a physical quantity describing mean meridional circulation(MMC) directly and quantitatively.Using the same grid data(1958—1998 NCEP/NCAR reanalysis data),this paper calculates ψ by using an iteration and superposition method respectively,and compares the differences and sameness of ψ in describing the MMC climatic state,anomalous MMC in the years of strong El Nino events and the double-layer structure of Hadley circulation.Results show that there is no apparent difference between them,however the superposition scheme only uses v-wind data and involves relatively simply computation.

关 键 词：平均经圈环流 质量流函数 迭代方案 叠加方案 气候态 强ElNino年异常态 

分 类 号：P434[天文地球—大气科学及气象学]