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Technical Note: Variance-covariance matrix and averaging kernels for the Levenberg-Marquardt solution of the retrieval of atmospheric vertical profiles
Variance-covariance matrix and averaging kernels the Levenberg-Marquardt solution atmospheric vertical profiles
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2010/8/12
The variance-covariance matrix (VCM) and the averaging kernel matrix (AKM) are widely used tools to characterize atmospheric vertical profiles retrieved from remote sensing measurements. Accurate esti...
Interpretation of organic components from Positive Matrix Factorization of aerosol mass spectrometric data
organic components Positive Matrix Factorization aerosol mass spectrometric data
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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
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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...
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
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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
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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
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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...
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
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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...