A Source Apportionment of U.S. Fine Particulate Matter Air Pollution.

ABSTRACT: Using daily fine particulate matter (PM_2.5) composition data from the 2000-2005 U.S. EPA Chemical Speciation Network (CSN) for over 200 sites, we applied multivariate methods to identify and quantify the major fine particulate matter (PM_2.5) source components in the U.S. Novel aspects of this work were: (1) the application of factor analysis (FA) to multi-city daily data, drawing upon both spatial and temporal variations of chemical species; and, (2) the exclusion of secondary components (sulfates, nitrates and organic carbon) from the source identification FA to more clearly discern and apportion the PM_2.5 mass to primary emission source categories. For the quantification of source-related mass, we considered two approaches based upon the FA results: 1) us

SUBMITTER: Thurston GD 

PROVIDER: S-EPMC3951912 | biostudies-literature | 2011 Aug

REPOSITORIES: biostudies-literature