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Title: Fine organic aerosols collected in a humid, rural location (Great Smoky Mountains, Tennessee, USA): Chemical and temporal characteristics
Authors: Yu, L.E. 
Shulman, M.L.
Kopperud, R.
Hildemann, L.M.
Keywords: Humid rural location
Organic aerosol
Solvent-soluble organic species
Water-soluble organic species
Issue Date: Oct-2005
Citation: Yu, L.E., Shulman, M.L., Kopperud, R., Hildemann, L.M. (2005-10). Fine organic aerosols collected in a humid, rural location (Great Smoky Mountains, Tennessee, USA): Chemical and temporal characteristics. Atmospheric Environment 39 (33) : 6037-6050. ScholarBank@NUS Repository.
Abstract: Fine organic aerosols collected at the Great Smoky Mountain National Park, Tennessee (USA) during 15 July -25 August 1995 as part of the Southeastern Aerosol and Visibility Study (SEAVS) were chemically characterized. The water-soluble organic species (WSOS) often dominated over the solvent-soluble organic species (SSOS) at this remote, humid sampling site, contributing 76-98% of the total identified organic mass in 17 out of the 21 daytime samples analyzed. Nighttime samples tended to have slightly larger concentrations of total SSOS than the daytime, with nocturnal/diurnal organic mass ratios greater than 1.0 in 7 out of the 10 paired samples. However, for total WSOS mass, the nocturnal-to-diurnal ratios were less than 0.3 in 7 out of the 10 paired samples, reflecting much more substantial depletion and/or less production of the more polar organics during nighttime. Based on identified species, the organic-mass-to-organic-carbon (OM-OC) ratios at the SEAVS site are estimated as 2.0, 2.2, and 1.3 for the daytime total organics, WSOS, and SSOS, respectively. For the nighttime samples, the OM-OC ratio for total identified organics is estimated to be 1.8, slightly lower than the daytime ratio due to the smaller mass fraction of WSOS present at night. © 2005 Elsevier Ltd. All rights reserved.
Source Title: Atmospheric Environment
ISSN: 13522310
DOI: 10.1016/j.atmosenv.2005.06.043
Appears in Collections:Staff Publications

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