ASDC | NARSTO_EPA_SS_PITTSBURGH_RAPID_SPMS_DATA

NARSTO Level 2

Entry Title: NARSTO EPA Supersite (SS) Pittsburgh Rapid Single-Particle Mass Spectrometer Data

Entry ID: NARSTO_EPA_SS_PITTSBURGH_RAPID_SPMS_DATA_1

Aerosols Tropospheric Composition Field Campaigns

Description

NARSTO_EPA_SS_PITTSBURGH_RAPID_SPMS_DATA is the North American Research Strategy for Tropospheric Ozone (NARSTO) Environmental Protection Agency (EPA) Supersite (SS) Pittsburgh Rapid Single-Particle Mass Spectrometer Data product. It was obtained between September 20 and December 27, 2001 during the Pittsburgh Air Quality Study (PAQS). During 12 months, starting September 2001, individual aerosol particles were sized and analyzed using a Rapid Single-particle Mass Spectrometer (RSMS) in Pittsburgh. RSMS aerodynamically focuses one particle size at a time to the source region of a mass spectrometer and employs a 193 nm excimer laser to desorb and ionize the particle components. The ions are analyzed in a dual time-of-flight mass spectrometer and the spectrum is digitally recorded. Spectra are only saved if the ion peak in the spectrum is above a threshold level. Background spectra were determined and flagged. Particle size scans were initiated periodically, and each size was sampled until 30 particle hits were obtained, unless the sampling time became excessive. Aerodynamic particle sizes ranged from about 40 to 1300 nm and were partitioned into nine discrete size classes logarithmically spaced, roughly, over the range. Single particle data were valuable because a) they were collected and analyzed real time so have excellent temporal resolution, b) the particle-to-particle composition variations (external mixing properties) could be assessed, and c) key particle sources were easily identified since the particles retain source characteristics. The data resulting from these measurements consist of an aerodynamic particle size and a positive and negative mass spectrum of the components for each particle, along with the date and time of measurement and other incidental measurement parameters such as the laser pulse energy.

The U.S. EPA Particulate Matter (PM) Supersites Program was an ambient air monitoring research program designed to provide information of value to the atmospheric sciences, and human health and exposure research communities. Eight geographically diverse projects were chosen to specifically address these EPA research priorities: (1) to characterize PM, its constituents, precursors, co-pollutants, atmospheric transport, and its source categories that affect the PM in any region; (2) to address the research questions and scientific uncertainties about PM source-receptor and exposure-health effects relationships; and (3) to compare and evaluate different methods of characterizing PM including testing new and emerging measurement methods.

NARSTO, which has since disbanded, was a public/private partnership, whose membership spanned across government, utilities, industry, and academe throughout Mexico, the United States, and Canada. The primary mission was to coordinate and enhance policy-relevant scientific research and assessment of tropospheric pollution behavior; activities provide input for science-based decision-making and determination of workable, efficient, and effective strategies for local and regional air-pollution management. Data products from local, regional, and international monitoring and research programs are still available.

DOI

10.5067/ASDCDAAC/NARSTO/0021

Citation Styles for this Dataset

Resources and Documentation

Earthdata Forum

PROJECT HOME PAGE

NARSTO Quality Systems Program Science Systems Legacy Page

VIEW RELATED INFORMATION

DATA CITATION POLICY

How to cite ASDC data

DATA QUALITY

Quality Assurance Final Report for the Pittsburgh Air Quality Study Pittsburgh Supersite June 30, 2001 - September 30, 2002

GENERAL DOCUMENTATION

ASDC Data and Information for NARSTO

PI DOCUMENTATION

Quality Assurance Project Plan for the Pittsburgh Air Quality Study (PAQS)

PRODUCT USAGE

Guide for NARSTO EPA_SS_PITTSBURGH Rapid Single-Particle Mass Spectrometer Data

PUBLICATIONS

Pittsburgh Air Quality Study (PAQS) Final Report

SCIENCE DATA PRODUCT VALIDATION

From GCMD Science Keywords:

PARTICULATES

Schenley Park
Particle: Ion Mass-To-Charge (M/Z) Ratio
Particulates
Single Particle Mass Spectra

Data Distribution

File Format(s):

ASCII

Get Dataset

Note: "Get Dataset" is a link to our recommended order method. The down arrow will show you additional options.

Spatial Information

Spatial Coverage: (S: 40.43, N: 40.43), (W: -79.94, E: -79.94)
Spatial Coverage Type: Horizontal
Coordinate System: Cartesian
Granule Spatial Representation: Cartesian

Locations

PITTSBURGH

Temporal Information

Temporal Coverage: 2001-09-20 - 2001-12-27

Platforms

Field Sites

FIELD SURVEYS

RSMS

Rapid Single-particle Mass Spectrometer

Metadata Dates

Created on 2003-11-26

Last updated on 2024-09-05