Laboratory Experiments and Instrument Development for the Study of Atmospheric Aerosols

doi:10.2172/1030966

GSTDTAP > 地球科学

DOI	10.2172/1030966
报告编号	DOE/ER63995
来源ID	OSTI ID: 1030966
	Laboratory Experiments and Instrument Development for the Study of Atmospheric Aerosols
	Liu, Zhengyu [Univ. of Wisconsin, Madison, WI (United States)]; Kutzbach, J. [Univ. of Wisconsin, Madison, WI (United States)]; Jacob, R. [Argonne National Lab. (ANL), Argonne, IL (United States)]; Prentice, C. [Bristol Univ. (United Kingdom)]
	2011-12-10
出版年	2011
语种	英语
国家	美国
领域	地球科学
英文摘要	Soot particles are generated by incomplete combustion of fossil and biomass fuels. Through direct effects clear air aerosols containing black carbon (BC) such as soot aerosols, absorb incoming light heating the atmosphere, while most other aerosols scatter light and produce cooling. Even though BC represents only 1-2% of the total annual emissions of particulate mass to the atmosphere, it has been estimated that the direct radiative effect of BC is the second-most important contributor to global warming after absorption by CO2. Ongoing studies continue to underscore the climate forcing importance of black carbon. However, estimates of the radiative effects of black carbon on climate remain highly uncertain due to the complexity of particles containing black carbon. Quantitative measurement of BC is challenging because BC often occurs in highly non-spherical soot particles of complex morphology. Freshly emitted soot particles are typically fractal hydrophobic aggregates. The aggregates consist of black carbon spherules with diameters typically in the range of about 15-40 nm, and they are usually coated by adsorbed polyaromatic hydrocarbons (PAHs) produced during combustion. Diesel-generated soot particles are often emitted with an organic coating composed primarily of lubricating oil and unburned fuel, as well as well as PAH compounds. Sulfuric acid has also been detected in diesel and aircraft-emitted soot particles. In the course of aging, these particle coatings may be substantially altered by chemical reactions and/or the deposition of other materials. Such processes transform the optical and CCN properties of the soot aerosols in ways that are not yet well understood. Our work over the past seven years consisted of laboratory research, instrument development and characterization, and field studies with the central focus of improving our understanding of the black carbon aerosol climate impacts. During the sixth year as well as during this seventh year (no-cost extension period) of our grant, we extended our studies to perform experiments on the controlled production and characterization of secondary organic aerosol.
英文关键词	Atmospheric aerosol Laboratory experiments Instrument development
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来源平台	US Department of Energy (DOE)
引用统计
文献类型	科技报告
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/5361
专题	地球科学
推荐引用方式 GB/T 7714	Liu, Zhengyu [Univ. of Wisconsin, Madison, WI ,Kutzbach, J. [Univ. of Wisconsin, Madison, WI ,Jacob, R. [Argonne National Lab. ,et al. Laboratory Experiments and Instrument Development for the Study of Atmospheric Aerosols,2011.