Probing isoprene photochemistry at atmospherically relevant nitric oxide levels

Zhang, Xuan; Wang, Siyuan; Apel, Eric C.; Schwantes, Rebecca H.; Hornbrook, Rebecca S.; Hills, Alan J.; DeMarsh, Kate E.; Moo, Zeyi; Ortega, John; Brune, William H.; Mauldin, Roy L.; Cantrell, Christopher A.; Teng, Alexander P.; Blake, Donald R.; Campos, Teresa; Daube, Bruce; Emmons, Louisa K.; Hall, Samuel R.; Ullmann, Kirk; Wofsy, Steven C.; Wennberg, Paul O.; Tyndall, Geoffrey S.; Orlando, John J.

doi:10.1016/j.chempr.2022.08.003

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The NOAA IR serves as an archival repository of NOAA-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by NOAA or funded partners. As a repository, the NOAA IR retains documents in their original published format to ensure public access to scientific information.

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Probing isoprene photochemistry at atmospherically relevant nitric oxide levels

2022
By Zhang, Xuan ; Wang, Siyuan ; Apel, Eric C. ; ...
Source: Chem, 8(12), 3225-3240

[PDF-3.97 MB]

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Journal Title:

Chem
Personal Author:

Zhang, Xuan ; Wang, Siyuan ; Apel, Eric C. ; Schwantes, Rebecca H. ; Hornbrook, Rebecca S. ; ... More +

Zhang, Xuan ; Wang, Siyuan ; Apel, Eric C. ; Schwantes, Rebecca H. ; Hornbrook, Rebecca S. ; Hills, Alan J. ; DeMarsh, Kate E. ; Moo, Zeyi ; Ortega, John ; Brune, William H. ; Mauldin, Roy L. ; Cantrell, Christopher A. ; Teng, Alexander P. ; Blake, Donald R. ; Campos, Teresa ; Daube, Bruce ; Emmons, Louisa K. ; Hall, Samuel R. ; Ullmann, Kirk ; Wofsy, Steven C. ; Wennberg, Paul O. ; Tyndall, Geoffrey S. ; Orlando, John J. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; CIRES (Cooperative Institute for Research in Environmental Sciences) ; CSL (Chemical Sciences Laboratory)

OAR (Oceanic and Atmospheric Research) ; CIRES (Cooperative Institute for Research in Environmental Sciences) ; CSL (Chemical Sciences Laboratory) Less -
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The reactive chemistry of isoprene, which is the dominant hydrocarbon in biogenic emissions, has a controlling influence on the composition and cleansing capacity of the global atmosphere. Despite decades of research, isoprene continues to offer surprises in its atmospheric chemistry, particularly in environments with low-to-moderate levels of nitrogen oxides (NOx). Here, we probe the isoprene photochemical oxidation in this \intermediate-NOx\ regime by examining the yield distributions of two major oxidation products, i.e., methacrolein and methyl vinyl ketone, using chamber experiments and aircraft measurements. Such a dataset provides strong constraints on the kinetics of the isoprene peroxy radical interconversion—a newly discovered mechanism that essentially governs the isoprene oxidation carbon flow. Insights from measurement-model comparisons further reveal an efficient operation of this mechanism across all the vegetated continents over the globe, constantly modulating the radical cycling and contributing to the formation of ozone and organic aerosols in the atmosphere.
Source:

Chem, 8(12), 3225-3240
DOI:

https://doi.org/10.1016/j.chempr.2022.08.003
ISSN:

2451-9294
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pdf
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Elsevier BV
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Journal Article-Accepted Manuscript
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https://creativecommons.org/licenses/by-nc-nd/4.0/
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CC BY-NC-ND
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The NOAA IR provides access to this content under the authority of the government's retained license to distribute publications and data resulting from federal funding. While users may legally access this content, the copyright owners retain rights that govern the reproduction, redistribution, and re-use of this work. The user is solely responsible for complying with applicable copyright law.
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urn:sha-512:28a0ce30aa1f861996f958cc00631c609ca7ec5be884950f216260751f79da8de4d051719212d2cd8b2ccf461f60683ca2929d329608d5104f032da6d35e2375
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Probing isoprene photochemistry at atmospherically relevant nitric oxide levels

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