Optical properties of mixed mineral, biomass burning and marine aerosols at dry and ambient conditions

干燥和环境条件下混合矿物、生物质燃烧和海洋气溶胶的光学特性

• 批准号: 5426065
• 负责人: Professor Dr. Alfred Wiedensohler
• 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 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5426065?language=en
• 关键词: Optical; properties; mixed; mineral; biomass

Hygroscopic and optical dust properties and their link to particle size distribution and chemical composition are important issues for research on atmospheric dust. The goal of this project is thus two-fold. First, existing measurement techniques for hygroscopic growth and optical properties of dust particles are improved and extended to reduce particle-growth-related and optical uncertainties in radiative transfer models. The new techniques are employed during the first field phase for a better characterization of light scattering and hygroscopic growth in the source region for Saharan dust. For that purpose samples from other partners of the consortium will be evaluated besides own samples and online measurements. All new instrumental developments will be apllied during the second field campaign (second phase of the project), which will extend the range of results to detailed vertical profiles of optical properties of the anthropogenically contaiminated Saharan dust plume.

尘埃的吸湿性和光学性质及其与粒径分布和化学成分的关系是大气尘埃研究的重要问题。因此，该项目的目标是双重的。首先，现有的测量技术的吸湿增长和光学特性的尘埃粒子的改进和扩展，以减少粒子增长相关的和光学的不确定性辐射传输模型。在第一个实地阶段采用了新技术，以便更好地表征撒哈拉尘埃源区的光散射和吸湿增长。为此目的，除了自己的样品和在线测量外，还将评估来自联合体其他合作伙伴的样品。所有新的仪器开发都将在第二次实地活动（项目第二阶段）期间应用，这将把结果范围扩大到受大气污染的撒哈拉尘羽光学特性的详细垂直剖面。