Radiative Properties of Sahara Dust: In-situ Aircraft Measurements and Model Calculations

该项目是DFG研究小组建议SAMUM(撒哈拉矿物粉尘实验)的一部分。它结合了空中现场测量、辐射模拟和卫星数据，研究了撒哈拉沙漠尘埃颗粒的辐射特性。空中测量将在摩洛哥的联合Samum实地运动中进行，这是一个靠近主要尘埃源(撒哈拉沙漠)的合适地点。它们包括沙漠尘埃微物理性质的垂直剖面测量。重点是测量波长范围在295到1.700纳米之间的向上和向下的光谱辐照度。计算主要集中在对沙漠沙尘气溶胶辐射特性至关重要的非粒子效应上。模拟的投入基于实验室和现场测量，这些测量是在本项目内进行的，或由Samum研究小组的其他合作伙伴提供。模拟的结果将与飞机的测量结果进行比较。这种复杂的测量和适当的辐射传输计算的结合对于尘埃气溶胶粒子来说是独一无二的，并将加强对其辐射特性的了解。

This project is part of the DFG research group proposal SAMUM (SAharan Mineral dUst ExperiMent). It concerns the radiative properties of Sahara desert dust particles using a combination of airborne field measurements, radiation simulations, and satellite data. The airborne measurements will be carried out within the joint SAMUM field campaign in Morocco, a suitable site close to a major dust source (Sahara desert). They include vertical profile measurements of desert dust microphysical properties. The focus is on the measurement of up- and downward spectral irradiances in the wavelength range between 295 and 1.700 nm. The calculations focus on particle nonspericity effects, which are crucial for the radiative properties of desert dust aerosol. The input for the simulations is based on laboratory and field measurements, which are conducted within this project or delivered by other partners of the SAMUM research group. The results of the simulations will be compared with the aircraft measurements. Such a combination of sophisticated measurements and appropriate radiative transfer calculations is unique for dust aerosol particles and will enhance the understanding of their radiative properties.