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

该项目的核心是通过整合和调整几个现有的和新开发的描述沙尘排放、运输和沉积各个方面的子模式来模拟北非沙尘特性的空间和暂时演变，从而发展基于物理的北非沙尘循环预测中尺度模式系统。此外，我们将评估大气对撒哈拉沙尘辐射强迫的响应，并伴随拉格朗日过程的研究。现代气候条件下北非尘埃对云微物理的影响。作为研究小组“撒哈拉矿物粉尘实验”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机械的模式，以便能够预测北非沙尘循环的未来变化，例如，这些变化可能影响辐射收支，从而影响地中海欧洲的气候。然而，作为我们模型验证策略的一部分，我们将进行模拟，其中使用卫星衍生和现场衍生数据规定关键组件（例如，源区域，植被覆盖）。这将使我们能够确定单个组件的模拟效果，并为进一步的模型开发提供指导方针。我们将探讨如何通过广泛的敏感性测试，将在这一建模工作中吸取的经验教训重新应用于全球模式。该项目的问题是关于撒哈拉沙尘远距离输送对大气辐射和微物理影响的过程研究的性能。

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.