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Application of positive matrix factorization to on-road measurements for source apportionment of diesel- and gasoline-powered vehicle emissions in Mexico City
positive matrix factorization on-road measurements source apportionment diesel- and gasoline-powered vehicle emissions Mexico City
2010/8/12
The goal of this research is to quantify diesel- and gasoline-powered motor vehicle emissions within the Mexico City Metropolitan Area (MCMA) using on-road measurements captured by a mobile laboratory...
Positive sampling artifact of carbonaceous aerosols and its influence on the thermal-optical split of OC/EC
carbonaceous aerosols thermal-optical split OC/EC
2009/10/9
Accurate measurement of carbonaceous aerosols is challenging, due to the sampling artifact and the problems of the split of OC/EC. Two approaches have been used to account for the positive artifact: b...
Interpretation of organic components from Positive Matrix Factorization of aerosol mass spectrometric data
organic components Positive Matrix Factorization aerosol mass spectrometric data
2009/5/7
The organic aerosol (OA) dataset from an Aerodyne Aerosol Mass Spectrometer (Q-AMS) collected at the Pittsburgh Air Quality Study (PAQS) in September 2002 was analyzed with Positive Matrix Factorizati...
Assessing positive matrix factorization model fit: a new method to estimate uncertainty and bias in factor contributions at the measurement time scale
Assessing positive matrix factorization model factor contributions measurement time scale
2009/3/12
A Positive Matrix Factorization receptor model for aerosol pollution source apportionment was fit to a synthetic dataset simulating one year of daily measurements of ambient PM2.5 concentrations, comp...
Rocket measurements of positive ions during polar mesosphere winter echo conditions
Rocket measurements positive ions polar mesosphere winter echo conditions
2009/1/21
On 18 January 2005, two small, instrumented rockets were launched from Andøya Rocket Range (69.3° N, 16° E) during conditions with Polar Mesosphere Winter Echoes (PMWE). Each of the rockets was...
Application of positive matrix factorization in estimating aerosol secondary organic carbon in Hong Kong and its relationship with secondary sulfate
positive matrix factorization aerosol secondary organic carbon Hong Kong secondary sulfate
2008/12/30
Secondary organic carbon (SOC) is often a significant portion of organic carbon (OC) in ambient particulate matter (PM). The levels and seasonal patterns of SOC in Hong Kong were examined using more t...
Size-resolved source apportionment of ambient particles by positive matrix factorization at Gosan background site in East Asia
ambient particles positive matrix factorization Gosan background site East Asia
2008/12/30
Size- and time-resolved aerosol samples were collected using an eight-stage Davis rotating unit for monitoring (DRUM) sampler from 29 March to 29 May in 2002 at Gosan, Jeju Island, Korea, which is one...
Spatiotemporal variations of ambient PM10 source contributions in Beijing in 2004 using positive matrix factorization
spatiotemporal variations positive matrix factorization
2008/11/7
Source contributions to ambient PM10 (particles with an aerodynamic diameter of 10 μm or less) in Beijing, China were determined with positive matrix factorization (PMF) based on ambient PM10 composit...
Variation and balance of positive air ion concentrations in a boreal forest
Variation balance positive air ion concentrations boreal forest
2008/10/29
Air ions are characterized on the basis of measurements carried out in a boreal forest at the Hyytiälä SMEAR station, Finland, during the BIOFOR III campaign in spring 1999. The air ions wer...
Source Apportionment of Air Particulate Matter by Chemical Mass Balance (CMB) and Comparison with Positive Matrix Factorization (PMF) Model
Chemical mass balance (CMB) Source Apportionment Positive matrix factorization (PMF) PIXE PM10-2.2 PM2.2
2016/3/30
The Chemical Mass Balance (CMB) model is one of several receptor models that have been
applied to air quality management. This model quantifies contributions using chemical signatures
characterizing...