Parameterized Yields of Semivolatile Products from Isoprene Oxidation under Different NOx Levels: Impacts of Chemical Aging and Wall-Loss of Reactive Gases

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

We developed a parametrizable box model to empirically derive the yields of semivolatile products from VOC oxidation using chamber measurements, while explicitly accounting for the multigenerational chemical aging processes (such as the gas-phase fragmentation and functionalization and aerosol-phase oligomerization and photolysis) under different NOx levels and the loss of particles and gases to chamber walls. Using the oxidation of isoprene as an example, we showed that the assumptions regarding the NOx-sensitive, multigenerational aging processes of VOC oxidation products have large impacts on the parametrized product yields and SOA formation. We derived sets of semivolatile product yields from isoprene oxidation under different NOx levels. However, we stress that these product yields must be used in conjunction with the corresponding multigenerational aging schemes in chemical transport models. As more mechanistic insights regarding SOA formation from VOC oxidation emerge, our box model can be expanded to include more explicit chemical aging processes and help ultimately bridge the gap between the process-based understanding of SOA formation from VOC oxidation and the bulk-yield parametrizations used in chemical transport models

Detaljer

Författare
  • Li Xing
  • Manish Shrivastava
  • Tzung-May Fu
  • Pontus Roldin
  • Yun Qian
  • Nga L. Ng
  • John Shilling
  • Alla Zelenyuk
  • Christopher D Cappa
Enheter & grupper
Externa organisationer
  • Peking University
  • Pacific Northwest National Laboratory
  • Institute of Earth Environment,CAS
  • Georgia Institute of Technology
  • California Institute of Technology
  • University of California, Davis
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Naturvetenskap
  • Bioenergi
Originalspråkengelska
Sidor (från-till)9225-9234
TidskriftEnvironmental Science & Technology
Volym52
Utgåva nummer16
StatusPublished - 2018 jul 20
PublikationskategoriForskning
Peer review utfördJa