Strahlungswirksamkeit des atmosphärischen Mineralstaubs: Neue Modellstudien auf der Basis von Feldmessungen in Westafrika im Rahmen des AMMA (African Monsoon Multidisciplinary Analysis) Programms

矿物粉尘是大气气溶胶中质量最突出的组成部分之一。每年在干旱和半干旱地区排放的二氧化碳超过10亿吨，并被运往世界各地的偏远地区。尘埃粒子通过散射和吸收大气辐射来改变辐射平衡，因此对我们的气候以及其他方面有直接影响。由于对尘埃关键特性的认识非常不准确，对这种直接辐射效应的量化还不可能有足够的精度。在所要求的研究项目的框架内，将进行辐射转移计算，以便更好地估计西非尘埃颗粒的直接辐射影响。因此，在2006年AMMA项目范围内进行的两次密集实地活动中进行的测量将得到应用。这些测量包括关于物理、化学和光学性质的信息，这些信息将作为辐射传输计算的输入参数，以及可用于验证模型结果的辐射通量密度的测量。

Mineral dust is one of the most prominent components of the atmospheric aerosol in terms of mass. More than one billion tons are emitted in the arid and semi-arid regions every year and are transported into remote regions all over the world. The dust particles modify the radiation balance through scattering and absorption of the atmospheric radiation and hence have a direct influence on our climate, among other aspects. Due to the great inaccuracy concerning the knowledge of the dust key properties, a quantification of this direct radiative effect has not yet been possible with adequate precision. In the framework of the requested research project radiative transfer calculations will be performed in order to achieve a better estimation of the direct radiative effect of dust particles in West Africa. Thereby measurements performed during two intensive field campaigns in 2006 within the scope of the AMMA program will be applied. These measurements include information on the physical, chemical and optical properties which will serve as input parameters for the radiative transfer calculations as well as measurements of the radiative flux densities that can be used to verify the model results.