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Title: What do correlations tell us about anthropogenic – biogenic interactions and SOA formation in the Sacramento plume during CARES?

During the Carbonaceous Aerosols and Radiative Effects Study (CARES) the DOE G-1 aircraft was used to sample aerosol and gas phase compounds in the Sacramento, CA plume and surrounding region. We present data from 66 plume transects obtained during 13 flights in which southwesterly winds transported the plume towards the foothills of the Sierra Nevada Mountains. Plume transport occurred partly over land with high isoprene emission rates. Our objective is to empirically determine whether organic aerosol (OA) can be attributed to anthropogenic or biogenic sources, and to determine whether there is a synergistic effect whereby OA concentrations are enhanced by the simultaneous presence of high concentrations of CO and either isoprene, MVK+MACR (sum of methyl vinyl ketone and methacrolein) or methanol, which are taken as tracers of anthropogenic and biogenic emissions. Furthermore, linear and bi-linear correlations between OA, CO, and each of three biogenic tracers, “Bio”, for individual plume transects indicate that most of the variance in OA over short time and distance scales can be explained by CO.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [2] ;  [3] ;  [4] ;  [4] ;  [4] ;  [4]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Univ. of California at Davis, Davis, CA (United States)
  3. Aerodyne Research Inc., Billerica, MA (United States)
  4. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Publication Date:
OSTI Identifier:
1237969
Report Number(s):
PNNL-SA-110254; BNL-111950-2016-JA
Journal ID: ISSN 1680-7316; KP1701000
Grant/Contract Number:
AC05-76RL01830; AC02-98CH10886; SC00112704
Type:
Published Article
Journal Name:
Atmospheric Chemistry and Physics
Additional Journal Information:
Journal Volume: 16; Journal Issue: 3; Journal ID: ISSN 1680-7316
Publisher:
European Geosciences Union
Research Org:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 58 GEOSCIENCES