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.
出处
《南京气象学院学报》
CSCD
北大核心
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)
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
zonally mean meridional circulation
mass stream function
iteration method
superposition method
comparison of computational results
