Modeling and observation of Sahara dust transport, modification and radiative impact

该项目的核心是开发基于物理的北方非洲沙尘循环预测性中尺度模型系统，方法是整合和调整若干现有和新开发的描述沙尘排放、输送和沉积各个方面的子模型，以模拟北方非洲沙尘特性的空间和临时演变。此外，我们将评估大气响应撒哈拉沙尘辐射强迫，伴随拉格朗日过程的研究。在现代气候条件下通过排放的北方非洲尘埃对云微物理的影响。作为“撒哈拉矿物粉尘实验”研究小组SAMUM的一部分，该项目将利用计划中的实地活动，这将提供广泛的数据集来验证和约束粉尘模型。有必要开发一个完全的机械模型，以便能够预测非洲北部沙尘循环的未来变化，例如，对辐射收支的影响，从而对地中海欧洲的气候产生影响。然而，作为我们模型验证策略的一部分，我们将进行模拟，其中关键组件（例如，源区、植被覆盖）的数据。这将使我们能够确定单个组件的模拟程度，并为进一步的模型开发提供指导。我们将探讨如何在这一建模工作中吸取的经验教训，可以重新应用于全球模型，通过广泛的敏感性测试检查的问题，该项目是性能的过程研究的影响，远距离传输的撒哈拉沙漠灰尘对大气辐射和微观物理。

The core of this project is the development of physically based predictive mesoscale model system of the northern African dust cycle by integrating and adapting several existing and newly developed sub-models describing various aspects of dust emission, transport and deposition to simulate the spatial and temporary evolution of northern African dust properties. In addition, we will evaluate atmospheric responce to the radiative forcing by Saharan dust, accompanying Lagrangian process studies. Northern Africa dust on cloud microphysics by emissions under modern climate conditions. As part of the Research Group "SAharan Mineral dUst experiMent" SAMUM the project will capitalize on the planned field campaign, which will provide extensive datasets to validate and constrain the dust model. It is necessary to develop a fully mechanistic model in order to be able t predict future changes in the nortehrn African dust cycle, which could, e.g., impact on the radiative budget and hence climate of Mediterranean Europe. However, as part of our model validation strategy, we will make simulations in which key components (e.g., source areas, vegetation cover) are prescribed using satellite derived and field derived data. This will enable us to determine how well individual components are simulated and provide guidelines for further model development. We will explore how the lessons learned in this modeling exercise can be reapplied in global models through extensive sensitivity tests examining issue of the project is the performanceof process studies on the influence of long-range transported Saharan dust on atmospheric radiation and microphysics.