Journal of Geophysical Research: Atmospheres
Carbon isotopic signatures (δ13C, Δ14C) 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)δ13C values (−27 to −24‰) indicated predominantly terrestrial C3 plant and fossil derived sources. Total solvent extracts (TSE) and their aliphatic, aromatic, and polar OC components were depleted in δ13C (−30 to −26‰) relative to TOC and WSOC. Δ14C signatures of aerosol TOC and TSE (−476 to +25‰) suggest variable fossil contributions (∼5–50%) to these components. Aliphatic OC while comprising a small portion of the TOC (
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Original Publication Citation
Wozniak, A. S., Bauer, J. E., Dickhut, R. M., Xu, L., & McNichol, A. P. (2012). Isotopic characterization of aerosol organic carbon components over the eastern United States. Journal of Geophysical Research: Atmospheres, 117(D13303), 1-14. https://doi.org/10.1029/2011JD017153
Wozniak, Andrew S.; Bauer, James E.; Dickhut, Rebecca M.; Li, Xu; and McNichol, Ann P., "Isotopic Characterization of Aerosol Organic Carbon Components Over the Eastern United States" (2012). Chemistry & Biochemistry Faculty Publications. 90.