Radiative Transfer in Cirrus Clouds: Theory and Experiment

该项目是对由非球形冰晶组成的云的辐射转移进行基础研究的继续，具体应用于解释从空中和空间对卷云进行的辐射测量。 它包括一个实验方案，以测量光谱反射率和散射相函数在可见光和近红外的冰云在实验室冷室中产生的。 目标包括比较冰云的理论散射特性与实验结果，并探索散射测量的信息内容，可能无法从理论上。 在理论方面，将对定向冰晶云的辐射转移进行计算，包括偏振计算，以便与地球反射率偏振和方向性仪器和高分辨率干涉仪探测仪的辐射测量值进行比较。 这项研究的结果将有助于了解卷云对地球辐射收支的影响，并有助于从空间和地面遥感云的特性。

This project is a continuation of fundamental studies of radiative transfer in clouds composed of nonspherical ice crystals, with specific application to the interpretation of radiometric measurements of cirrus clouds from the air and space. It includes an experimental program to measure the spectral reflectance and scattering phase function in the visible and near infrared of ice clouds generated in a laboratory cold chamber. The objectives include comparing the theoretical scattering properties of ice clouds with the experimental results and exploring the information content of scattering measurements that may not be available from theory. On the theoretical side, calculations will be made of radiative transfer in clouds of oriented ice crystals, including polarization, for comparison with radiometric measurements from the Polarization and Directionality of Earth's Reflectances (POLDER) and the High resolution Interferometer Sounder (HIS) instruments. Results of this research will contribute to understanding the effects of cirrus clouds on the earth's radiation budget and to the remote sensing of cloud properties from space and the ground.