Long-Term Changes of Source Apportioned Particle Number Concentrations in a Metropolitan Area of the Northeastern United States
The northeastern United States has experienced significant emissions reductions in the last two decades leading to a decrease in PM2.5, major gaseous pollutants (SO2, CO, NOx) and ultrafine particles (UFPs) concentrations. Emissions controls were implemented for coal-fired power plants, and new heav...
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doaj-c8e596d814314f6580ac438774b625382020-11-24T21:52:49ZengMDPI AGAtmosphere2073-44332019-01-011012710.3390/atmos10010027atmos10010027Long-Term Changes of Source Apportioned Particle Number Concentrations in a Metropolitan Area of the Northeastern United StatesStefania Squizzato0Mauro Masiol1Fereshteh Emami2David C. Chalupa3Mark J. Utell4David Q. Rich5Philip K. Hopke6Department of Public Health Sciences, University of Rochester Medical Center, Rochester, NY 14642, USADepartment of Public Health Sciences, University of Rochester Medical Center, Rochester, NY 14642, USACenter for Air Resources Engineering and Science, Clarkson University, Potsdam, NY 13699, USADepartment of Environmental Medicine, University of Rochester Medical Center, Rochester, NY 14642, USADepartment of Environmental Medicine, University of Rochester Medical Center, Rochester, NY 14642, USADepartment of Public Health Sciences, University of Rochester Medical Center, Rochester, NY 14642, USADepartment of Public Health Sciences, University of Rochester Medical Center, Rochester, NY 14642, USAThe northeastern United States has experienced significant emissions reductions in the last two decades leading to a decrease in PM2.5, major gaseous pollutants (SO2, CO, NOx) and ultrafine particles (UFPs) concentrations. Emissions controls were implemented for coal-fired power plants, and new heavy-duty diesel trucks were equipped with particle traps and NOx control systems, and ultralow sulfur content is mandatory for both road and non-road diesel as well as residual oil for space heating. At the same time, economic changes also influenced the trends in air pollutants. Investigating the influence of these changes on ultrafine particle sources is fundamental to determine the success of the mitigation strategies and to plan future actions. Particle size distributions have been measured in Rochester, NY since January 2002. The particle sources were investigated with positive matrix factorization (PMF) of the size distributions (11–470 nm) and measured criteria pollutants during five periods (2002–2003, 2004–2007, 2008–2010, 2011–2013, and 2014–2016) and three seasons (winter, summer, and transition). Monthly, weekly, and hourly source contributions patterns were evaluated.http://www.mdpi.com/2073-4433/10/1/27ultrafine particlessource apportionmentlong-term trendsair pollution |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Stefania Squizzato Mauro Masiol Fereshteh Emami David C. Chalupa Mark J. Utell David Q. Rich Philip K. Hopke |
spellingShingle |
Stefania Squizzato Mauro Masiol Fereshteh Emami David C. Chalupa Mark J. Utell David Q. Rich Philip K. Hopke Long-Term Changes of Source Apportioned Particle Number Concentrations in a Metropolitan Area of the Northeastern United States Atmosphere ultrafine particles source apportionment long-term trends air pollution |
author_facet |
Stefania Squizzato Mauro Masiol Fereshteh Emami David C. Chalupa Mark J. Utell David Q. Rich Philip K. Hopke |
author_sort |
Stefania Squizzato |
title |
Long-Term Changes of Source Apportioned Particle Number Concentrations in a Metropolitan Area of the Northeastern United States |
title_short |
Long-Term Changes of Source Apportioned Particle Number Concentrations in a Metropolitan Area of the Northeastern United States |
title_full |
Long-Term Changes of Source Apportioned Particle Number Concentrations in a Metropolitan Area of the Northeastern United States |
title_fullStr |
Long-Term Changes of Source Apportioned Particle Number Concentrations in a Metropolitan Area of the Northeastern United States |
title_full_unstemmed |
Long-Term Changes of Source Apportioned Particle Number Concentrations in a Metropolitan Area of the Northeastern United States |
title_sort |
long-term changes of source apportioned particle number concentrations in a metropolitan area of the northeastern united states |
publisher |
MDPI AG |
series |
Atmosphere |
issn |
2073-4433 |
publishDate |
2019-01-01 |
description |
The northeastern United States has experienced significant emissions reductions in the last two decades leading to a decrease in PM2.5, major gaseous pollutants (SO2, CO, NOx) and ultrafine particles (UFPs) concentrations. Emissions controls were implemented for coal-fired power plants, and new heavy-duty diesel trucks were equipped with particle traps and NOx control systems, and ultralow sulfur content is mandatory for both road and non-road diesel as well as residual oil for space heating. At the same time, economic changes also influenced the trends in air pollutants. Investigating the influence of these changes on ultrafine particle sources is fundamental to determine the success of the mitigation strategies and to plan future actions. Particle size distributions have been measured in Rochester, NY since January 2002. The particle sources were investigated with positive matrix factorization (PMF) of the size distributions (11–470 nm) and measured criteria pollutants during five periods (2002–2003, 2004–2007, 2008–2010, 2011–2013, and 2014–2016) and three seasons (winter, summer, and transition). Monthly, weekly, and hourly source contributions patterns were evaluated. |
topic |
ultrafine particles source apportionment long-term trends air pollution |
url |
http://www.mdpi.com/2073-4433/10/1/27 |
work_keys_str_mv |
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