Analysis of Aircraft Radiometric and Cloud Physics Data obtained during the FIRE-IFO Cirrus Experiment

本研究项目旨在研究卷云的辐射加热速率，评估由于我们目前缺乏对卷云特性的了解而导致的这些估计的不确定性，并开发一种用于在气候模式中表示卷云的这些辐射加热相互作用的参数化方法。使用的方法是：(i)分析在卷云FIRE-IFO期间获得的可用辐射和微物理数据；（ii）开发能够模拟飞机观测的卷云辐射传输模型；（iii）评估这种传输对冰晶形状、方向、颗粒浓度和大小等方面的敏感性；（四）比较理论和观测到的宽带通量和升温速率，（五）结合其他数据进行比较，制定云升温的简单模型。这项工作很重要，因为它将导致在气候模式中改进卷云的参数化。

This research project aims to study the radiative heating rates of cirrus clouds, to assess the uncertainty of these estimates due to our present lack of understanding of cirrus properties and to develop a means for the parameterization of these radiative heating interactions for use in representing cirrus clouds in climate models. The methods to be used is: (i) to analyze the available radiative and microphysical data obtained during the cirrus FIRE-IFO period, (ii) develop models of the radiative transfer through cirrus clouds capable of simulating the aircraft observations, (iii) assess the sensitivity of this transfer to aspects of ice crystal shape, orientation, particle concentration and size, (iv) compare the theoretical and observed broadband fluxes and heating rates, and (v) use comparisons along with other data to formulate and simple model of cloud heating. This work is important because it will lead to improved parameterization of cirrus clouds in climate models.