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首页> 外文期刊>IEEE Geoscience and Remote Sensing Letters >Validating Mixed-Phase Cloud Optical Depth Retrieved From Infrared Observations With High Spectral Resolution Lidar
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Validating Mixed-Phase Cloud Optical Depth Retrieved From Infrared Observations With High Spectral Resolution Lidar

机译：验证从具有高光谱分辨率激光雷达的红外观测中检索到的混合相云光学深度

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摘要

Single-layer mixed-phase clouds are prevalent in the Arctic atmosphere. The properties of mixed-phase clouds, including the optical depth of both the liquid and ice components, can be retrieved from spectrally resolved infrared radiance observations that are made in both the 8–13-$muhbox{m}$ and 17–24-$muhbox{m}$ windows. The accuracy of the retrieved properties from this algorithm has been established in single-phase clouds (i.e., clouds that contain only liquid or only ice) but not in mixed-phase clouds. A polarization-sensitive high spectral resolution lidar (HSRL) was deployed to the Atmospheric Radiation Measurement Program''''s Barrow, Alaska site during the fall of 2004. The HSRL measures optical depth directly, and the phase can be discriminated using the depolarization ratio measured by the lidar. Comparisons of the infrared retrieved optical depths with the optical depths directly observed by the lidar in clouds that consist of supercooled liquid layers precipitating ice are in good agreement, with the slope and correlation being 1.055 and 0.65 for the ice portion of the mixed-phase cloud and 0.954 and 0.82 for the liquid portion.
机译：单层混合相云在北极大气中盛行。混合相云的性质，包括液体和冰成分的光学深度，都可以从在8–13- $ muhbox {m} $和17–24- $ muhbox {m} $窗口。已经从单相云（即仅包含液体或仅包含冰的云）中确定了从该算法检索到的属性的准确性，但在混合相云中则未确定该精度。偏振敏感的高光谱分辨率激光雷达（HSRL）在2004年秋季部署到了“大气辐射测量计划”的阿拉斯加州巴罗场址。HSRL直接测量光学深度，并且可以使用去极化来区分相位由激光雷达测量的比率。红外测得的光学深度与激光雷达在由沉淀冰的过冷液层组成的云中直接观测到的光学深度的比较吻合得很好，混合相云的冰部分的斜率和相关性分别为1.055和0.65液体部分则为0.954和0.82。

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