摘要
利用湍流动能闭合方法改进了区域气候模式（ＲｅｇＣＭ２）中边界层的参数化过程，并用资料进行了数值试验。结果表明．采用该方法可以较好地描述边界层的物理过程，温度、位势高度、比湿等物理量场的模拟均有不同程度的改善，提高了边界层计算的精度。该工作还对模式中边界层高度的计算作了改进，使边界层高度的日变化及高度极值都更符合实际情况。
The boundary layer parameterization scheme in regional climate model (RegCM2) is improved by applying turbulence kinetic energy (TKE) closure scheme. The NCEP/NCARreanalysis data of 1991 is employed to test the effects of the TKE closure scheme on regionalclimate modeling. The results show :After employing TKE closure scheme, the physical process in boundary layer can bedescribed more realistically. The simulation of the geo-potential height field and temperaturefield etc. are obviously improved, especially. the more distinct improvements occurs in thetemperature field and specific humidity field of lower levels that are directly effect by boundary layer parameterization scheme.An improving can also be made on calculating the height of boundary layer, the resultshows that the diurnal variation and the diurnal extreme of boundary layer height can be described more reasonable.
出处
《气象学报》
CSCD
北大核心
1999年第6期641-650,共10页
Acta Meteorologica Sinica
基金
国家科技攻关项目!96-908-02-04-04
关键词
湍流动能闭合
边界层
区域气候模式
湍流
Turbulence kinetic energy closure scheme
. Boundary layer
Regional climate simulation.
