Harvard Bounce Apparatus GoAmazon 2014/15 Field Campaign Report

doi:10.2172/1253999

GSTDTAP > 地球科学

DOI	10.2172/1253999
报告编号	DOE/SC--ARM-15-033
来源ID	OSTI ID: 1253999
	Harvard Bounce Apparatus GoAmazon 2014/15 Field Campaign Report
	Bateman, Adam; Martin, Scott T.
	2016-05-01
出版年	2016
页数	14
语种	英语
国家	美国
出版者	DOE ARM Climate Research Facility, Pacific Northwest National Laboratory, Richland, WA
领域	地球科学
英文摘要	The effect of relative humidity (RH) on the physical state of particulate matter during the GoAmazon 2014/15 campaign was investigated through the use of particle rebound (or lack thereof) during impaction. The physics governing particle rebound have been previously modeled and can be attributed to the surface and material properties. The physical state of secondary organic material is regulated by several factors, including the local RH, the recent RH history in the case of hysteresis, and chemical composition. Across the range of atmospheric RH, hygroscopic water uptake can occur and transitions from higher to lower viscosity phases are possible. By varying the particulate matter water content and observing particle rebound as a function of RH, the phase state of the organic material under investigation can be determined. Custom-made impactors were employed to study the effects of RH (up to 95%) on the particle physical state. Results inferred from the particle rebound measurements indicate that, under ambient conditions (RH >80%), particulate matter in Amazonia can be considered in a liquid phase state. However, during certain time periods, a fraction (10 to 30%) of particulate matter is found to rebound during the highest RH conditions, which indicates the presence of hydrophobic particles. The source of the hydrophobic particulates appears to be anthropogenic, from either biomass burning or the Manaus plume.
英文关键词	Hydrophobic particulates cloud condensation nuclei particle phase transition transport of pollutants isoprenes Manacapuru particle rebound
URL	查看原文
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/7266
专题	地球科学
推荐引用方式 GB/T 7714	Bateman, Adam,Martin, Scott T.. Harvard Bounce Apparatus GoAmazon 2014/15 Field Campaign Report:DOE ARM Climate Research Facility, Pacific Northwest National Laboratory, Richland, WA,2016.