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Spatial distribution of ice and liquid water in Arctic boundary layer clouds and its effects on solar energy budget and remote sensing

北极边界层云中冰和液态水的空间分布及其对太阳能收支和遥感的影响

基本信息

批准号：
116121569
负责人：
Professor Dr. Manfred Wendisch
金额：
--
依托单位：
Institut für Meteorologie
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2009
资助国家：
德国
起止时间：
2008-12-31 至 2012-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/116121569?language=en
关键词：
Spatial distribution ice liquid water

项目摘要

We propose to investigate the spatial distribution of ice and liquid water in Arctic boundary layer mixed-phase clouds and its impact on (a) solar energy budget (cloud forcing) and (b) cloud remote sensing. The three-dimensional radiative effects on cloud radiative forcing and remote sensing of cloud properties will be estimated. For this purpose a combination of airborne spectral solar radiation measurements and sophisticated one-dimensional (1D)1 and three-dimensional (3D) radiative transfer simulations is suggested. The measurements will be conducted during the campaign SoRPlC for which funding of 60 flight hours is already granted by AWI. The radiation measurements include downwelling and upwelling spectral irradiance and radiance with the SMART-Albeodometer and upwelling radiances with the hyperspectral imaging system AISA EAGLE. Irradiance measurements will be analyzed with regard to cloud radiative forcing. On measured radiance approved cloud phase retrieval algorithms will be applied to derive the distribution of ice and liquid water in high spatial resolution. This information will be used as input for 1D/3D radiative transfer simulations. On the basis of closure between measured and calculated radiation the impact of the spatial heterogeneity of cloud phase on cloud radiative forcing and remote sensing will be calculated.

我们建议研究北极边界层混合相云中冰和液态水的空间分布及其对（a）太阳能收支（云强迫）和（B）云遥感的影响。将估计三维辐射对云辐射强迫和云特性遥感的影响。为此，建议将机载光谱太阳辐射测量和复杂的一维（1D）1和三维（3D）辐射传输模拟相结合。测量将在SoRPlC活动期间进行，AWI已经为该活动提供了60个飞行小时的资金。辐射测量包括下降流和上升流的光谱辐照度和辐射度与智能反照率计和上升流的辐射度与高光谱成像系统AISA鹰。将结合云辐射强迫对辐照度测量结果进行分析。在测量的辐射率上，将应用经批准的云相反演算法来获得高空间分辨率的冰和液态水的分布。这些信息将被用作1D/3D辐射传输模拟的输入。根据辐射测量值与计算值之间的闭合关系，计算了云相的空间不均匀性对云辐射强迫和遥感的影响。