Composition and reactivity of volatile organic compounds in the South Coast Air Basin and San Joaquin Valley of California

Abstract 4, and NOx data, the total calculated gas-phase hydroxyl radical reactivity (cOHRTOTAL) was quantified to be 6.1 and 4.6 s- 1 ∼ TOTAL in both basins. In particular, oxygenated VOCs (OVOCs) contributed > 60  % of the cOHR of total VOCs (cOHRVOC) and the total observed VOC mixing ratio. Primary biogenic VOCs (BVOCs) represented a minor fraction (< 2  %) of the total VOC mixing ratio but accounted for 21 % and 6 % of the cOHRVOC in the SoCAB and SJV, respectively. Furthermore, the contribution of BVOCs to the cOHRVOC increased with increasing cOHRVOC in the SoCAB, suggesting that BVOCs were important ozone precursors during high ozone episodes. Spatially, the trace gases were heterogeneously distributed in the SoCAB, with their mixing ratios and cOHR being significantly greater over the inland regions than the coast, while their levels were more evenly distributed in SJV. The results highlight that a better grasp of the emission rates and sources of OVOCs and BVOCs is essential for a predictive understanding of the ozone abundance and distribution in California.

Object Details

• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch

References and Relationships

• Bibliographic citation: Composition and reactivity of volatile organic compounds in the South Coast Air Basin and San Joaquin Valley of California ; volume:22 ; number:16 ; year:2022 ; pages:10937-10954 ; extent:18 ; Atmospheric chemistry and physics ; 22, Heft 16 (2022), 10937-10954 (gesamt 18)

Contributors, Places and Time

• Creator: Liu, Shang ; Barletta, Barbara ; Hornbrook, Rebecca S. ; Fried, Alan ; Peischl, Jeff ; Meinardi, Simone ; Coggon, Matthew ; Lamplugh, Aaron ; Gilman, Jessica B. ; Gkatzelis, Georgios ; Warneke, Carsten ; Apel, Eric C. ; Hills, Alan J. ; Bourgeois, Ilann ; Walega, James ; Weibring, Petter ; Richter, Dirk ; Kuwayama, Toshihiro ; FitzGibbon, Michael ; Blake, Donald

Further information

• DOI: 10.5194/acp-22-10937-2022
• URN: urn:nbn:de:101:1-2022090105234572754479
• Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Last update: 15.08.2025, 7:26 AM CEST