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Título: | Intercomparison Between Surrogate, Explicit, and Full Treatments of VSL Bromine Chemistry Within the CAM-Chem Chemistry-Climate Model |
Autor: | Fernández, Rafael P. CSIC ORCID; Barrera, J.A.; López-Noreña, A.I.; Kinnison, Douglas E.; Nicely, Julie; Salawitch, R.J.; Wales, P.A.; Toselli, B.M.; Tilmes, Simone; Lamarque, Jean-François; Cuevas, Carlos A. CSIC ORCID; Saiz-Lopez, A. CSIC ORCID | Fecha de publicación: | 28-dic-2020 | Editor: | American Geophysical Union | Citación: | Geophysical Research Letters 48: e2020GL091125 (2021) | Resumen: | Many Chemistry-Climate Models (CCMs) include a simplified treatment of brominated very short-lived (VSL) species by assuming CHBr as a surrogate for VSL. However, neglecting a comprehensive treatment of VSL in CCMs may yield an unrealistic representation of the associated impacts. Here, we use the Community Atmospheric Model with Chemistry (CAM-Chem) CCM to quantify the tropospheric and stratospheric changes between various VSL chemical approaches with increasing degrees of complexity (i.e., surrogate, explicit, and full). Our CAM-Chem results highlight the improved accuracy achieved by considering a detailed treatment of VSL photochemistry, including sea-salt aerosol dehalogenation and heterogeneous recycling on ice-crystals. Differences between the full and surrogate schemes maximize in the lowermost stratosphere and midlatitude free troposphere, resulting in a latitudinally dependent reduction of ∼1–7 DU in total ozone column and a ∼5%–15% decrease of the OH/HO ratio. We encourage all CCMs to include a complete chemical treatment of VSL in the troposphere and stratosphere. | Descripción: | 10 pags., 4 figs. | Versión del editor: | http://dx.doi.org/10.1029/2020GL091125 | URI: | http://hdl.handle.net/10261/254210 | DOI: | 10.1029/2020GL091125 | Identificadores: | doi: 10.1029/2020GL091125 issn: 1944-8007 |
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Fichero | Descripción | Tamaño | Formato | |
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Treatments of VSL Bromine.pdf | 3,05 MB | Adobe PDF | Visualizar/Abrir | |
Supporting Information.pdf | 932,48 kB | Adobe PDF | Visualizar/Abrir |
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