| Title | Isotopic characterization of aerosol organic carbon components over the eastern United States |
| Publication Type | Journal Article |
| Year of Publication | 2012 |
| Authors | Wozniak, AS, Bauer, JE, Dickhut, RM, Xu, L, McNichol, AP |
| Journal | Journal of Geophysical Research-Atmospheres |
| Volume | 117 |
| Pagination | D13303-D13303 |
| ISSN | 0148-0227 |
| Abstract | Carbon isotopic signatures (delta C-13, Delta C-14) of aerosol particulate matter total organic carbon (TOC) and operationally defined organic carbon (OC) components were measured in samples from two background sites in the eastern U. S. TOC and water-soluble OC (WSOC) delta C-13 values (-27 to -24 parts per thousand) indicated predominantly terrestrial C-3 plant and fossil derived sources. Total solvent extracts (TSE) and their aliphatic, aromatic, and polar OC components were depleted in delta C-13 (-30 to -26 parts per thousand) relative to TOC and WSOC. Delta C-14 signatures of aerosol TOC and TSE (-476 to +25 parts per thousand) suggest variable fossil contributions (similar to 5-50%) to these components. Aliphatic OC while comprising a small portion of the TOC ( |
| DOI | 10.1029/2011JD017153 |
