edu.ucar.opensky::articles:42502 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T18:11:48.004159 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.net/ark:/85065/d7vt1xfj Interactions of peroxy radicals from monoterpene and isoprene oxidation simulated in the radical volatility basis set 2024-07-01T00:00:00Z publication https://n2t.net/ark:/85065/d7vt1xfj https://doi.org/10.1039/d4ea00056k Schervish, M. author Heinritzi, M. author Stolzenburg, D. author Dada, L. author Wang, M. author Ye, Qing author Hofbauer, V. author DeVivo, J. author Bianchi, F. author Brilke, S. author Duplissy, J. author El Haddad, I. author Finkenzeller, H. author He, X. author Kvashnin, A. author Kim, C. author Kirkby, J. author Kulmala, M. author Lehtipalo, K. author Lopez, B. author Makhmutov, V. author Mentler, B. author Molteni, U. author Nie, W. author Petäjä, T. author Quéléver, L. author Volkamer, R. author Wagner, A. author WInkler, P. author Yan, C. author Donahue, N. author UCAR/NCAR - Library publisher Isoprene affects new particle formation rates in environments and experiments also containing monoterpenes. For the most part, isoprene reduces particle formation rates, but the reason is debated. It is proposed that due to its fast reaction with OH, isoprene may compete with larger monoterpenes for oxidants. However, by forming a large amount of peroxy-radicals (RO2), isoprene may also interfere with the formation of the nucleating species compared to a purely monoterpene system. We explore the RO2 cross reactions between monoterpene and isoprene oxidation products using the radical Volatility Basis Set (radical-VBS), a simplified reaction mechanism, comparing with observations from the CLOUD experiment at CERN. We find that isoprene interferes with covalently bound C20 dimers formed in the pure monoterpene system and consequently reduces the yields of the lowest volatility (Ultra Low Volatility Organic Carbon, ULVOC) VBS products. This in turn reduces nucleation rates, while having less of an effect on subsequent growth rates. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication <style type="text/css"></style><span style="font-family:Arial;font-size:10pt;font-style:normal;" data-sheets-root="1">Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.</span> None eng geoscientificInformation