Organic functional group and organic matter concentrations from FT-IR measurements of particulate matter samples in the Southeastern Aerosol Research and Characterization (SEARCH) network from 2009-2016

This dataset contains organic functional group, organic matter (OM), organic carbon (OC) concentration measurements at five sites in the SEARCH network from 2009-2016.  Spectra from each sample are included, in the format used in these papers.  The sampling sites are urban Birmingham (BHM) and rural Centreville (CTR) in Alabama, urban Jefferson Street, Atlanta (JST) and rural Yorkville (YRK) in Georgia, and rural Outlying Landing Field (OLF) near Pensacola in Florida as well as a co-located site at JST (cJST).  The organic functional groups measured are:  saturated/aliphatic C-H (aCH), carboxylic acid (COOH), oxalate C=O (oxOCO), and non-acid, non-oxalate carbonyl (naCO).  OM mass is calculated as the sum of the organic functional group masses.  Samples were collected for 24-hour from midnight to midnight. OC mass is the sum of the mass of carbon from each functional group.  From 2009-2015, data are available for every third day, and in 2016, daily data are available.Â