TagUltrafine Particulates(58)
-
2017-09-27Regional air quality briefing: Highline Forum
A September 2017 regional air quality briefing presented by the Puget Sound Clean Air Agency to the Highline Forum covers air pollution sources, trends in south King County, and efforts to improve air quality in the region. The presentation also introduces an upcoming University of Washington study on ultrafine particle pollution, which is particularly relevant to communities near high-traffic corridors. The agency's vision emphasizes clean and healthy air for all residents regardless of socioeconomic status or location, covering four counties: King, Pierce, Snohomish, and Kitsap. -
2017-07-26Air quality initiatives at Sea-Tac Airport
This 2017 presentation by Port of Seattle Sustainability Manager Leslie Stanton outlines air quality initiatives at Seattle-Tacoma International Airport, covering pollution sources, reduction programs, and the Port's environmental goals. It highlights that while the Port has limited regulatory authority, it is pursuing innovative strategies to cut emissions, including efforts around ultrafine particulates and climate-related particulate matter reductions. The presentation also reviews existing air quality studies and identifies next steps for improving air quality in and around Sea-Tac Airport. -
2016-07-26Tim Larson UW DEOHS presentation: Ultrafine particles near airports, July 2016
Title slide of a presentation titled 'Ultrafine Particles Near Airports' by Professor Tim Larson of the Department of Civil and Environmental Engineering (CEE) at the University of Washington (UW), dated December 2016. The slide features a photograph of a commercial aircraft on approach to landing at sunset, with visible wingtip vortices in the clouds above. -
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.