Multicomponent Atmospheric Aerosol-Water Interactions

多组分大气气溶胶-水相互作用

• 批准号: 0336296
• 负责人: Spyros Pandis
• 金额: $ 48万
• 依托单位: Carnegie-Mellon University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-12-15 至 2006-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0336296&HistoricalAwards=false
• 关键词: Multicomponent; Atmospheric; Aerosol; Water; Interactions

This project integrates laboratory and field measurements with modeling to investigate processes that control water interactions with multicomponent atmospheric aerosols. Reducing the current uncertainty in cloud condensation nuclei (CCN) activity has potentially a profound influence on gaining a more informed understanding the urban and regional atmosphere, as well as global climate change. The investigators will characterize ambient aerosol water uptake under varying environmental conditions, including consideration of both inorganic and organic speciation, and further investigate particle-aging effects of hydrated primary and secondary organic aerosols. Two research elements are involved, the first investigating aerosol water uptake at sub- and near-saturation using ambient measurements with an instrument of their own design, and the second laboratory studies aimed at characterization of primary and secondary sources of CCN. The broader impacts of this research include a better understanding as to how secondary organic aerosols under representative ambient conditions might modify CCN activity and control aerosol-water interactions, processes fundamentally important for visibility, radiative transfer and climate change. The project includes support for the research training of two graduate students.

该项目将实验室和现场测量与建模相结合，以研究控制水与多组分大气气溶胶相互作用的过程。减少目前云凝结核(CCN)活动的不确定性可能对更多地了解城市和区域大气以及全球气候变化产生深远影响。研究人员将在不同的环境条件下表征环境气溶胶的水吸收，包括考虑无机和有机形态，并进一步研究水合的初级和次级有机气溶胶的颗粒老化效应。涉及两项研究内容，第一项是利用自行设计的仪器进行环境测量，调查处于亚饱和和接近饱和状态的气溶胶吸水量，第二项实验室研究旨在确定CCN的主要和次要来源。这项研究的更广泛影响包括更好地了解在典型环境条件下的二次有机气溶胶如何改变CCN活动和控制气溶胶-水相互作用，这些过程对能见度、辐射传输和气候变化至关重要。该项目包括对两名研究生的研究培训提供支持。