optical depth

At the same time, the retrieval method of sun photometer data, including the ( calibration) and retrieval of aerosol optical depth and the quality control of data, is introduced.

同时，针对光度计原始观测资料直接应用的瓶颈问题&资料解读方案进行了讨论，包括定标、气溶胶光学厚度的计算、光度计数据质量控制方法等。

Characteristics of aerosol optical depth distributions over Sichuan Basin derived from MODIS data

用MODIS遥感资料分析四川盆地气溶胶光学厚度时空分布特征

The heating rate is 2.8 K/ d over China's desert and 0.4 K/ d over the Pacific region corresponding to the optical depth of dust aerosol of 1.0 and 0.3 with spring averaged solar altitude.

当沙漠上空光学厚度为1.0，海洋上空光学厚度为0.3时，取春季平均太阳高度角，沙尘层对应的净辐射加热率分别为2.8K/d和0.4K/d。

There is no simple one-to-one correspondence between optical depth and surface horizontal visibility.

光学厚度与地面水平能见度不呈简单的对应关系。

In a medium with large optical depth, such as snow that is more than a few inches deep, multiple scattering is rampant, that is, photons are scattered repeatedly each time changing direction.

在一个象雪这样具有大的光学厚度（几英寸厚）的介质中，非常容易出现多散射，即光子反复地被散射，每次散射的方向不同而已。

Inversion of Optical Depth from Sand Particle Using Total Direct Solar Radiation

根据太阳辐射反演沙尘粒子光学厚度个案分析

At first, an short introduction to the atmospheric radiation transferring model is given, then the factors impacting the aerosol optical depth inversion have been analyzed one by one, which include apparent reflectance, surface reflectance, geometry condition, atmospheric water vapor content and aerosol modes.

首先介绍了大气辐射传输模型；然后找出影响大气气溶胶反演的各个因素后逐一模拟分析，这些因子包括表观反射率、地表反射率、几何位置的变化、大气水汽含量和气溶胶模式等。

When the AOD value is greater than 1 with high solar zenith angle(> 60 °), the relative error can reach-40%. Satellite observations are an effective way to provide a regional coverage of aerosol optical depth and monitor the occurrence and evolution of dust storm.

当光学厚度大于1并且太阳天顶角较大时（60°），误差能达到-40%。卫星观测是提供全球气溶胶光学厚度分布以及监测沙尘发生的有效途径。

The required input to the parameterization includes precipitable water, concentration of carbon dioxide amount, ozone amount, cloud amount, cloud visible optical depth, solar zenith angle and surface albedo.

计算所需要的输入变量有：大气可降水量，二氧化碳含量，臭氧总量，云量，云的光学厚度，太阳天顶角，地表反射率。

Some pictures are shown which described the aerosol optical depth ( AOD ) distribution over Beijing.

给出了描述北京地区气溶胶光学厚度分布的几幅图片.

Aerosol optical depth and Angstrom parameter in BJ and XH showed close relation, which indicated the regional anthropogenic influence on atmospheric environment.

北京和香河两地气溶胶光学厚度、Angstrom指数和尺度谱基本相似，说明华北地区人为排放与沙尘活动类似，也表现出区域尺度的特点。

Optical depth and optical path are often confused in the literature.

文献中光学厚度和光程时常混淆.

The presented studies focus on the albedo and transmissivity of cirrus with different optical depth under ambient temperature of-20-25 ℃ at four solar radiative wavelength.

本文着重研究了环境温度为-20&-25℃时，不同光学厚度的卷云在4种太阳辐射波长的通量反射率和透射率。