湍流交换 meaning in Chinese
turbulent exchange
turbulentexchange
Examples
- Remote sensing techniques have demonstrated their potential for measurements of soil temperature , vegetation canopy and so on . however , what is very difficult that uses reasonably both remote sensing data and ground data in calculating the energy , mass . radiation and momentum exchanges at land - atmosphere interactions , let alone apply in practical works
但是，如何将遥感观测资料和常规资料结合起来研究辐射传输、湍流交换以及地表水的通量等局地尺度特征量是一难题，很多学者都已做了大量的工作，取得了相当鼓舞人心的结果，真正能实际应用的成果却很少。 - To investigate the space / time distributions and occurrence and evolution of such events , the diffusion pattern over deserts , turbulent transfer features in sandstorm weather , the particle size distribution , mass concentration and its distribution , optic properties , chemical composition and physical factors responsible for the initiation of raising sands , we made integrative observation and sounding of sandstorms deep in the large - scale desert area , including tengri , badanjilin and maowusu , with the items consisting of micrometeorological measurement , 3d wind observation , data from kb - 120 and anderson samplers of mass concentrations of sands with their spectrum , the distribution of aerodynamic particle sizes from the aps3310a , retrieval of aerosols " optic depth from sunphotometer data , assay of the chemical composition by means of neutron activiation analysis ( naa ) and integrated study of all related factors for causing sandstorm to occur , based on the observations of all kinds
利用所取资料，系统分析了不同强度沙尘天气条件下沙尘气溶胶质量浓度和质量浓度谱、粒子谱分布、光学厚度、化学组分等特征；综合分析了影响沙尘起动的诸物理因子在沙尘起动中的作用；用沙尘输送模式对一次沙尘暴天气造成的泥雨过程的形成机制进行了模拟。历史气象资料统计分析表明，沙尘暴有其高发期( 4 、 5月)和高发时段( 14 - 20时) ， 14时到20时之间发生的沙尘暴约占沙尘暴总次数的66 。扬沙和沙尘暴天气条件下，湍流动量通量和湍流感热通量都是重要的湍流交换，沙尘暴发生前近地层的超绝热不稳定对沙尘暴天气有加强作用。 - A transfer model is established , which can be used to study the interaction between the land surface physical processes of inhomogeneous region and the structure of atmosphere boundary - layer over urban and rural terrains . the model has simulated surface heat flux , surface temperature , temperature profiles , height of mixture layer and so on . and the differences between urban area , suburban area and rural area have been compared . this model mainly depends on the parameters below : surface albedo , surface roughness coefficient , moisture available coefficient of soil , thermal capacity and thermal diffusion coefficient of errain , cloudage . the result shows that this model can simulate the structure and eigenvalues of atmosphere boundary layer and their changes in a day . parameters used in this model aim at beijing city , and the time is at the beginning of september . to other cities , or other time , the parameters should be adjusted accordingly . in addition , being adjusted , the model can also be used for other homogeneous and inhomogeneous terrains
模式主要依赖于以下参数和物理量：地面反照率下垫面粗糙度土壤的可含水量下垫面的热容量和热扩散系数云量等参数。结果表明，本模式能合理地模拟不同地表热量平衡地表气温混合层高度湍流交换系数湍流动能位温廓线等，以及它们的日变化。该模式所取参数主要针对北京市，时间为九月初，对于其他城市，参数应作相应的调整。