Examining the Effects of Anthropogenic Emissions on Isoprene-derived Secondary Organic Aerosol Formation During the 2013 Southern Oxidant and Aerosol Study (SOAS) at the Look Rock, Tennessee, Ground Site
Budisulistiorini SH, Li X, Bairai ST, Renfro J, Liu Y, Liu YJ, McKinney KA, Martin ST, McNeill VF, Pyle HO, Nenes A, Neff ME, Stone EA, Mueller S, Knote C, Shaw SL, Zhang Z, Gold A, Surratt JD. 2015. Examining the Effects of Anthropogenic Emissions on Isoprene-derived Secondary Organic Aerosol Formation During the 2013 Southern Oxidant and Aerosol Study (SOAS) at the Look Rock, Tennessee, Ground Site. Atmospheric Chemistry and Physics Discussions. 15:7365-7417
A suite of offline and real-time gas- and particle-phase measurements was deployed at Look Rock, Tennessee (TN), during the 2013 Southern Oxidant and Aerosol Study (SOAS) to examine the effects of anthropogenic emissions on isoprene-5 derived secondary organic aerosol (SOA) formation. High- and low-time resolution PM2.5 samples were collected for analysis of known tracer compounds in isoprene-derived SOA by gas chromatography/electron ionization-mass spectrometry (GC/EIMS) and ultra performance liquid chromatography/diode array detection-electrospray ionization-high-resolution quadrupole time-of-flight mass spectrometry (UPLC/DAD10 ESI-HR-QTOFMS). Source apportionment of the organic aerosol (OA) was determined by positive matrix factorization (PMF) analysis of mass spectrometric data acquired on an Aerodyne Aerosol Chemical Speciation Monitor (ACSM)....The modeling and data combined 10 suggest an anthropogenic influence on isoprene-derived SOA formation through acidcatalyzed heterogeneous chemistry of IEPOX in the southeastern US. However, it appears that this process was not limited by aerosol acidity or LWC at Look Rock during SOAS. Future studies should further explore the extent to which acidity and LWC becomes a limiting factor of IEPOX-derived SOA, and their modulation by anthropogenic 15 emissions.
- Type
- Journal Article
- Authors
- Budisulistiorini, S; Li, X; Bairai, Solomon; Renfro, James; Liu, Y; Liu, Y; McKinney, K; Martin, S; McNeill, V; Pyle, H; Nenes, A; Neff, M; Stone, E; Mueller, S; Knote, C; Shaw, S; Zhang, Z; Gold, A; Surratt, J
- Units
- GRSM
- Keywords
- Aerosol, GRSM-00065, Look Rock, Southern Oxidant and Aerosol Study
- Subjects
- Ecological Framework: Air and Climate | Air Quality | Visibility and Particulate Matter