The Effect of Particle Phase State on Multiphase Hydroxyl Radical (OH) Oxidation Kinetics and Products of Biomass Burning Aerosol

GSTDTAP

项目编号	1446286
	The Effect of Particle Phase State on Multiphase Hydroxyl Radical (OH) Oxidation Kinetics and Products of Biomass Burning Aerosol
	Daniel Knopf
主持机构	SUNY at Stony Brook
项目开始年	2015
	2015-07-01
项目结束日期	2018-06-30
资助机构	US-NSF
项目类别	Standard Grant
项目经费	321512(USD)
国家	美国
语种	英语
英文摘要	Biomass burning aerosols (BBA) are ubiquitous throughout the global atmosphere. BBA source strength is believed to be of similar magnitude to the fossil fuel burning aerosols. Biomass burning plumes can affect the atmosphere on local to global scales, and BBAs can have a significant impact on visibility, and on the radiative forcing due to the direct scattering and absorption of radiation. By altering the properties of clouds, BBA also exert indirect effects on the radiation balance. Organic aerosols, representing a major mass fraction of the submicron size fraction, are implicated in human health effects. During atmospheric transport, organic aerosol particles are chemically transformed due to reactions with trace oxidizing species such as the hydroxyl radical (OH), resulting in chemical aging and ultimately cleansing of the atmosphere. The chemical aging of BBA particles by reactive trace gas species is not well understood, and so far investigations have been limited mostly to room temperature and dry conditions, although most of the atmosphere exhibits oxidizing conditions at lower temperatures and wider variations in relative humidity. Ambient environmental parameters, which induce altered viscosity or even phase changes, are responsible for altered chemical reactivity in BBA, and may in turn be responsible for altering the kinetics of many of these chemical transformations. A series of laboratory based investigations, using proxy and surrogate compounds under controlled conditions, are to be carried out in order to further describe the chemical transformations taking place during the formation, dispersal and aging of natural, biomass burning aerosols
来源学科分类	Geosciences - Atmospheric and Geospace Sciences
文献类型	项目
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/68181
专题	环境与发展全球科技态势
推荐引用方式 GB/T 7714	Daniel Knopf.The Effect of Particle Phase State on Multiphase Hydroxyl Radical (OH) Oxidation Kinetics and Products of Biomass Burning Aerosol.2015.