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

撒哈拉沙尘输送、改变和辐射影响的建模和观测

• 批准号: 5425994
• 负责人: Professor Dr. Andreas Macke
• 金额: --
• 依托单位: Leibniz-Institut für Troposphärenforschung e.V. (TROPOS)
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2004
• 资助国家: 德国
• 起止时间: 2003-12-31 至 2011-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5425994?language=en
• 关键词: Modeling; observation; Sahara; dust; transport

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.

该项目的核心是开发以物理为基础的北非沙尘循环中尺度预报模式系统，将描述沙尘排放、输送和沉积各个方面的几个现有和新开发的子模式整合和调整，以模拟北非沙尘性质的空间和临时演变。此外，我们还将结合拉格朗日过程研究，评估大气对撒哈拉沙尘辐射强迫的响应。在现代气候条件下，按排放计算的云微物理上的北非尘埃。作为研究小组“撒哈拉矿物粉尘实验”的一部分，该项目将利用计划中的实地活动，该活动将提供广泛的数据集来验证和约束粉尘模型。有必要建立一个完全机械的模型，以便能够预测非洲北部沙尘循环未来的变化，例如，这可能会影响地中海欧洲的辐射预算，从而影响气候。然而，作为我们模型验证战略的一部分，我们将使用卫星和现场数据进行模拟，其中规定了关键组成部分(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情况，并为进一步的模型开发提供指导方针。我们将通过广泛的敏感性测试，探讨如何将在这次建模工作中学到的经验教训重新应用于全球模式，检查该项目的执行情况，以及对远距离输送的撒哈拉沙尘对大气辐射和微物理的影响进行过程研究的结果。