气候变化领域集成服务门户(CCPortal): Changes in PM2.5concentrations and their sources in the US from 1990 to 2010

CCPortal

DOI	10.5194/acp-21-17115-2021
	Changes in PM2.5concentrations and their sources in the US from 1990 to 2010
	Skyllakou K.; Rivera P.G.; Dinkelacker B.; Karnezi E.; Kioutsioukis I.; Hernandez C.; Adams P.J.; Pandis S.N.
发表日期	2021
ISSN	1680-7316
起始页码	17115
结束页码	17132
卷号	21 期号:22
英文摘要	Significant reductions in emissions of SO2, NOx, volatile organic compounds (VOCs), and primary particulate matter (PM) took place in the US from 1990 to 2010. We evaluate here our understanding of the links between these emissions changes and corresponding changes in concentrations and health outcomes using a chemical transport model, the Particulate Matter Comprehensive Air Quality Model with Extensions (PMCAMx), for 1990, 2001, and 2010. The use of the Particle Source Apportionment Algorithm (PSAT) allows us to link the concentration reductions to the sources of the corresponding primary and secondary PM. The reductions in SO2 emissions (64%, mainly from electric-generating units) during these 20 years have dominated the reductions in PM2.5, leading to a 45% reduction in sulfate levels. The predicted sulfate reductions are in excellent agreement with the available measurements. Also, the reductions in elemental carbon (EC) emissions (mainly from transportation) have led to a 30% reduction in EC concentrations. The most important source of organic aerosol (OA) through the years according to PMCAMx is biomass burning, followed by biogenic secondary organic aerosol (SOA). OA from on-road transport has been reduced by more than a factor of 3. On the other hand, changes in biomass burning OA and biogenic SOA have been modest. In 1990, about half of the US population was exposed to annual average PM2.5 concentrations above 20μgm-3, but by 2010 this fraction had dropped to practically zero. The predicted changes in concentrations are evaluated against the observed changes for 1990, 2001, and 2010 in order to understand whether the model represents reasonably well the corresponding processes caused by the changes in emissions. © 2021 Ksakousti Skyllakou et al.
语种	英语
scopus关键词	air quality; concentration (composition); emission control; nitrogen oxides; particulate matter; sulfur dioxide; volatile organic compound; United States
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246414
作者单位	Institute of Chemical Engineering Sciences (FORTH/ICE-HT), Patras, 26504, Greece; Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, United States; Earth Sciences, Barcelona Supercomputing Center, Barcelona, 08034, Spain; Department of Physics, University of Patras, Patras, 26500, Greece; Department of Civil and Environmental Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, United States; Department of Chemical Engineering, University of Patras, Patras, 26500, Greece
推荐引用方式 GB/T 7714	Skyllakou K.,Rivera P.G.,Dinkelacker B.,et al. Changes in PM2.5concentrations and their sources in the US from 1990 to 2010[J],2021,21(22).
APA	Skyllakou K..,Rivera P.G..,Dinkelacker B..,Karnezi E..,Kioutsioukis I..,...&Pandis S.N..(2021).Changes in PM2.5concentrations and their sources in the US from 1990 to 2010.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(22).
MLA	Skyllakou K.,et al."Changes in PM2.5concentrations and their sources in the US from 1990 to 2010".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.22(2021).