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基于物理的北非沙尘循环预测中尺度模型系统，通过集成和调整几个现有的和新开发的描述沙尘排放、输送和沉积各个方面的子模型来模拟空间和暂时的演变北非灰尘特性。此外，我们将评估大气对撒哈拉尘埃辐射强迫的响应，同时进行拉格朗日过程研究。现代气候条件下北非排放对云微物理的尘埃影响。作为“撒哈拉矿尘实验”SAMUM 研究小组的一部分，该项目将利用计划中的实地活动，提供广泛的数据集来验证和约束灰尘模型。有必要开发一个完全机械的模型，以便能够预测北非沙尘循环的未来变化，这可能会影响辐射预算，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，其中使用卫星导出和现场导出的数据规定关键组成部分（例如源区、植被覆盖）。这将使我们能够确定各个组件的模拟效果，并为进一步的模型开发提供指导。我们将探讨如何通过广泛的敏感性测试在全球模型中重新应用本次建模练习中学到的经验教训，检查该项目的问题是远程传输的撒哈拉尘埃对大气辐射和微物理影响的过程研究的表现。