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Noval Experimental Techniques for the physical and chemical characterization of Nucleation mode Aerosol Particles

成核模式气溶胶颗粒物理和化学表征的新颖实验技术

基本信息

批准号：
142705878
负责人：
Professor Dr. Andreas B. Held
金额：
--
依托单位：
Fachgebiet Umweltchemie und Luftreinhaltung
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2009
资助国家：
德国
起止时间：
2008-12-31 至 2013-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/142705878?language=en
关键词：
Noval Experimental Techniques physical chemical

项目摘要

The impact of aerosol particles on the Earth’s radiation budget, the complex multiphase chemistry of the atmosphere, ecosystem fluxes of nutrients or pollutants, and air quality is strongly dependent on particle number, size, chemical composition and their distribution within the atmosphere. Therefore, the relevant sources, sinks, transport mechanisms and transformation processes of aerosol particles need to be identified and quantified in order to improve our fundamental understanding of the atmospheric aerosol and to formulate adequate model parameterizations. This proposal aims at exploring innovative experimental techniques for the direct quantification of turbulent fluxes and the chemical composition of nucleation mode aerosol particles (less than 30 nm in diameter) in the lower atmospheric boundary layer. It is suggested to develop a miniaturized collection system for nucleation mode aerosol particles, and couple it to a field-portable ion trap time-of-flight mass spectrometer for in-situ analysis of the aerosol chemical composition. The combination of the mass spectrometer and true eddy accumulation will yield unique aerosol flux measurement capabilities. Field deployment of these novel experimental techniques will contribute to an improved description of aerosol transport mechanisms and the atmospheric distribution of newly formed particles as well as a better understanding of gas-to-particle conversion processes, especially the relevance of organic species in secondary particle formation. Thus, this proposal will address fundamental scientific questions, e.g. the impact of aerosol particles on global climate, and important societal issues such as the design and implementation of effective control strategies and regulatory policies with regard to aerosol health effects.

气溶胶粒子对地球辐射收支、大气层复杂的多相化学、营养物或污染物的生态系统通量以及空气质量的影响在很大程度上取决于粒子的数量、大小、化学成分及其在大气层中的分布。因此，相关的源，汇，传输机制和转化过程的气溶胶粒子需要确定和量化，以提高我们的基本理解大气气溶胶和制定适当的模式参数化。该提案旨在探索创新的实验技术，用于直接量化低层大气边界层中湍流通量和成核模式气溶胶颗粒（直径小于30纳米）的化学成分。建议研制一种小型化的气溶胶成核模式粒子收集系统，并将其与现场便携式离子阱飞行时间质谱仪耦合，用于气溶胶化学成分的原位分析。质谱仪和真实涡流积累的组合将产生独特的气溶胶通量测量能力。这些新的实验技术的实地部署将有助于改进气溶胶传输机制和新形成的颗粒的大气分布的描述，以及更好地了解气体到颗粒的转换过程，特别是在二次粒子形成的有机物种的相关性。因此，本提案将解决基本科学问题，例如气溶胶颗粒对全球气候的影响，以及重要的社会问题，例如设计和实施有效的控制战略和有关气溶胶健康影响的监管政策。