Light absorption of organic carbon and its sources at a southeastern U.S. location in summer.

ABSTRACT: Light-absorbing organic carbon (OC), also referred to as "brown carbon" (BrC), has been intensively investigated in atmospheres impacted by biomass burning. However, other BrC sources (e.g., secondary formation in the atmosphere) are rarely studied in ambient aerosols. In the current work, forty-five PM_2.5 filter samples were collected in Research Triangle Park (RTP), NC, USA from June 1st to July 15th, 2013. The bulk carbonaceous components, including OC, elemental carbon (EC), water soluble OC (WSOC), and an array of organic molecular markers were measured; an ultraviolet/visible spectrometer was used to measure the light absorption of methanol extractable OC and WSOC. The average light absorption per OC and WSOC mass of PM_2.5 samples in summer RTP are 0.36 ± 0.16 m

SUBMITTER: Xie M 

PROVIDER: S-EPMC6697000 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature