TagUltrafine Particulates(66)
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2016-12-01Ultrafine Particles Near Airports
This December 2016 presentation by University of Washington Professor Tim Larson examines ultrafine particles (UFPs) — tiny airborne particles smaller than 0.1 micrometers — found near airports, with a focus on emissions from aircraft and other combustion sources. Conducted in collaboration with researchers from UW and USC, the study explores how these microscopic particles, which are far smaller than diesel smoke or tobacco smoke particles, may pose environmental and health concerns for communities near airports like Sea-Tac. The research provides scientific context for understanding air quality impacts associated with airport operations. -
2014-09-03Estimates of HVAC filtration efficiency for fine and ultrafine particles of outdoor origin
Department of Civil, Architectural and Environmental Engineering, Illinois Institute of Technology, Chicago, IL, USA Received 31 July 2014, Revised 26 August 2014, Accepted 3 September 2014, Available online 4 September 2014. Abstract This work uses 194 outdoor particle size distributions (PSDs) from the literature to estimate single-pass heating, ventilating, and air-conditioning (HVAC) filter removal efficiencies -
2014-05-29Planes’ exhaust could be harming communities up to 10 miles from LAX
A plane flies overhead as Joe Mejia, 21, left; Derick Montes, 6; and Leonardo Armenia, 14, play in Lennox. A new study has found high levels of potentially harmful particles in communities up to 10 miles east of LAX. (Francine Orr / Los Angeles Times) By Dan Weikel and Tony Barboza May 29, 2014 5 AM -
2013-08-24LAX ultrafine particle (UFP) concentrations map, August 2013
This map displays ultrafine particle (UFP) concentrations measured by quartile along driving routes near Los Angeles International Airport (LAX) on August 24, 2013, between 1300–1800 hours. The map includes a wind rose showing predominant westerly winds, 65 dB noise contours from LAX flight paths, and nearby freeways I-405, I-110, and I-105. -
2012-02-18
Scientists Find New Dangers in Tiny but Pervasive Particles in Air Pollution
By Felicity Barringer Feb. 18, 2012 Fine atmospheric particles — smaller than one-thirtieth of the diameter of a human hair — were identified more than 20 years ago as the most lethal of the widely dispersed air pollutants in the United States. Linked to both heart and lung disease, they kill an estimated 50,000 Americans -
2005-07-15Fine-scale spatial and temporal variability of particle number concentrations within communities and in the vicinity of freeway sound walls
This 2005 technical proposal from the University of Southern California requests funding from the California Air Resources Board to study how ultrafine particle pollution varies at a fine scale within communities and near freeway sound walls. Researchers aim to determine whether single monitoring stations accurately represent residents' actual exposure to ultrafine particles, which are emitted primarily by vehicle traffic and are considered more toxic than the larger particles currently regulated by federal and state standards. The study focuses on spatial and temporal measurement of particle number concentrations rather than particle mass, as ultrafine particles may pose greater health risks despite making up only a small fraction of total airborne particulate matter.