zenith angles meaning in Chinese
天顶角
Examples
- Single - layer model is convenient to apply but the unclear relationship between radiative and aerodynamic temperatures is still a bottleneck in this field . a new method was developed to derive reliable surface heat fluxes from radiative temperature viewed from arbitrary zenith angle . aerodynamic and radiative temperatures are connected through a so - called optimum component fraction ( ocf ) parameter - the fraction of vegetation in the field of view when the two temperatures are equivalent in oblique viewing
该方法利用表面热辐射方向性和显热通量都是源于土壤和植被温度的贡献这一共同点，发现在一定倾斜角度的观测下，视场中植被与土壤的比例可以较好地反映植被和土壤与大气进行湍流热交换的贡献率，所以称该方法为最佳组分面积比法，用最佳组分面积比可以将任意角度下观测到的辐射温度订正为空气动力学温度，经过地面和遥感数据验证表明，用该方法计算的通量精度高于普通的单层模型。 - In this paper , the solar and land - atmosphere radiation rates are calculated by modtran3 model and satellite observation as well as surface data , solar direct irradiance infrared irradiance solar heating rate and infrared cooling rate were calculated from 43 samples of sunshine day and 5 samples of cloudy day 3 samples of rainy day of different latitudes in 12 stations . the paper analyzed solar heating rate and infrared cooling rate in sunshine day , the factors such as zenith angle , water vapor and latitude were found out correlating with solar heating rate and infrared cooling rate . solar heating rate and infrared cooling rate change on the same day and at the same station
在对晴空大气的计算中，本文对太阳的直接辐射与地气系统的红外辐射状况进行了分析，并讨论在不同的大气状况下太阳加热率和红外冷却率的情况，找出与太阳加热率和红外冷却率变化相关较大的因子?太阳天顶角和水汽条件、纬度；本文还进一步分析了不同纬度样本的太阳加热率与红外冷却率日变化及有云、有雨情况下太阳加热率和红外冷却率的变化情况：另外，文中通过改变二氧化碳在大气中含量的方法，讨论了它对太阳加热率与红外冷却率的影响。 - A two stream model has been used to calculate the variation of optical depth and their effects to ultraviolet radiation of each extinction material . with the model , the relation among season , solar zenith angle and ultraviolet radiation has been discussed , and the variation of ultraviolet radiation under different clouds has also been studied . the comparative research of ultraviolet radiation among kunming , beijing and other abroad area at the same latitude has also been done
在已建立的计算昆明紫外辐射两流模式改进的基础上，进一步计算并讨论了： 1各种消光物质的光学厚度变化规律及其对紫外辐射的影响2季节变化及太阳天顶角变化与紫外辐射的关系3不同云的光学厚度下紫外辐射的变化4昆明与北京两地模式计算结果比较，以及与国外相近纬度观测结果进行了比较。