| 荒漠戈壁下垫面表面动量和感热湍流通量参数化研究 |
| |
| 作者姓名： | ZHANG Qiang HUANG Ronghui TIAN Hui |
| |
| 作者单位： | [1]InstituteofAridMeteorology,ChinaMeteorologicalAdministration,Lanzhou730020 [2]InstituteofAtmosphericPhysics,ChineseAcademyofSciences,Beijing100029 [3]ColdandAridRegionsEnvironmentandEngineeringInstitute,ChineseAcademyofSciences,Lanzhou730000 |
| |
| 基金项目： | This work was supported by the National Natu-ral Science Foundation of China under Grant No.40175004 and the National Key Program for Developing Basic Sci-ences of China under Grant No.G1998040904-2. |
| |
| 摘 要： | 用合理筛选以后的野外观测资料，研究了荒漠戈壁地表湍流通量参数化的问题。首先，分析了Monin-obukhov相似函数的特征，并拟台出了其经验公式。结果表明，风速和温度相似性函数随稳定度参数的变化曲线与典型经验曲线差异较小，并且在经验曲线分布范围以内，但中性时的值有所不同。同时，还用该资料给出了动量和标量粗糙度(感热粗糙度)长度的平均值及其标量粗糙度随摩擦速度的变化关系。发现标量粗糙度的平均值大约比动量粗糙度的小一个量级，并且随摩擦速度的增大而减小，但明显比其理论预测值要大。
|
| 关 键 词： | 荒漠戈壁 下垫面 表面动量 感热湍流通量 风速 温度 相似性函数 标量粗糙度 |
A Parameterization Scheme of Surface Turbulent Momentum and Sensible Heat over the Gobi Underlying Surface |
| |
| ZHANG Qiang,HUANG Ronghui,TIAN Hui.A Parameterization Scheme of Surface Turbulent Momentum and Sensible Heat over the Gobi Underlying Surface[J].Advances in Atmospheric Sciences,2003,20(1):111-118. |
| |
| Authors: | Qiang Zhang Ronghui Huang Hui Tian |
| |
| Institution: | Institute of Arid Meteorology, China Meteorological Administration, Lanzhou 730020;Cold and Arid Regions Environment and Engineering Institute, Chinese Academy of Sciences, Lanzhou 730000,Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029,Cold and Arid Regions Environment and Engineering Institute, Chinese Academy of Sciences, Lanzhou 730000 |
| |
| Abstract: | The parameterization of surface turbulent fluxes over the Gobi Desert in arid regions is studied by usingrationally screened observational data. First, the characteristics of Monin-Obukhov similarity functionsare analyzed and their empirical formulae are fitted. The results show that fitted curves of changes ofsimilarity functions of wind speed and temperature with stability parameter differ little from the typicalempirical curves and are within the ranges of scatter of the empirical curves, but their values in the neutralcondition are different from the typical values to some extent. Furthermore, average values of momentumand scalar (sensible heat) roughness lengths as well as changes of scalar roughness length with frictionvelocity are determined by utilizing the data. It is found that the average values of scalar roughness lengthare about one order smaller than that of the momentum roughness length and decrease with increasingfriction velocity, but they are evidently larger than their theoretically forecasted values. |
| |
| Keywords: | Gobi surface turbulent flux parameterization similarity functions scalar roughness length |
| 本文献已被 CNKI 维普 万方数据 SpringerLink 等数据库收录！ |
| 点击此处可从《大气科学进展》浏览原始摘要信息 |
| 点击此处可从《大气科学进展》下载免费的PDF全文 |
