NARSTO EPA Supersite in LA PM2.5-10 Composition and Mass DataEntry ID: NARSTO_EPA_SS_LOS_ANGELES_PARTISOL_DATA
Abstract: Data are available for samples collected using Partisol Model 2025-D samplers between late 2000 and late 2003 variously from sites at Downey, Claremont, Riverside, Rubidoux, and the University of Southern California (USC). Samples were collected episodically, frequently for a 24-hour per period, but in some cases multiple samples were collected over the course of a day. Element/metals, ... nitrate/sulfate ion, and mass concentration data were obtained.
The Partisol is a dichotomous sequential multi-filter air sampler. It uses a virtual impactor to divide the air stream to facilite the collection of fine (0.0-2.5um) and coarse (2.5-10.0um) particles onto a filter media over a pre-programmed collection period. The coarse fraction was analysed
using X-ray flourescence and mass concentration analysis. Ion chromatography and mass concentration analyses were performed on the fine fraction.
The overall objective of the Southern California Supersite (SCS) was to conduct research and monitoring that contributes to a better understanding of the measurement, sources, size distribution, chemical composition, physical state, spatial and temporal variability, and health effects of suspended particulate matter (PM) in the Los Angeles Basin (LAB). Intensive aerosol measurements, well beyond the traditional PM2.5 mass, sulfate and nitrate concentrations, were conducted in several areas of the LAB. These included particle number concentrations, size distributions, and detailed PM chemical composition as a function of particle size. Sampling locations were chosen to provide
wide geographical and seasonal coverage, including urban source sites and downwind receptor sites.
The primary sampling facility, a mobile Particle Instrumentation Unit (PIU), was deployed to several locations to conduct a wide range of PM measurements. Sampling in each site lasted for 6-12 months. Intensive PM measurements were also conducted up and downwind of several freeways of the LAB, to characterize near-roadway exposure environments and to support several in vivo and in vitro health studies. The monitoring activities of the SCS were linked with toxicology studies in the LAB using a mobile PM Concentrator facility to investigate health effects associated with exposures to ultrafine, fine and coarse particles. Finally, the PIU facility was successfully used as a platform to develop, test, and evaluate numerous PM measurement instruments and sampling technologies, including several monitors for semi-continuous size fractionated mass and chemistry, personal PM exposure monitors, particle concentration technologies, and particle counting devices.
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Start Date: 2000-10-03Stop Date: 2003-09-19
ISO Topic Category
Data Set Progress
Email: sioutas at usc.edu
University of Southern California 3440 S. Hope Street
City: Los Angeles
Province or State: CA
Postal Code: 90089-7777
Email: rcyu at ucla.edu
Role: DIF AUTHOR
Email: larc-asdc-uds at lists.nasa.gov
NASA Langley Atmospheric Science Data Center User and Data Services NASA Langley Research Center 2 South Wright Street Mail Stop 157D Building 1268C
Province or State: VA
Postal Code: 23681-2199
Rong Chun Yu, Hee Wen Teh, Peter A. Jaques, Constantinos Sioutas, John R. Froines. 2004. Quality control of semi-continuous mobility size-fractionated particle number concentration data. Atmospheric Environment, Volume 38, Issue 20, Pages 3341-3348.
Shen S, Jaques PA, Zhu YF, Geller MD, Sioutas C. 2002. Evaluation of the SMPS-APS system as a continuous monitor for measuring PM2.5, PM10 and coarse (PM2.5-10) concentrations. ATMOSPHERIC ENVIRONMENT 36(24) 3939-3950.
Creation and Review Dates
DIF Creation Date: 2011-08-25
Last DIF Revision Date: 2011-08-29