Intercomparison Between Surrogate, Explicit, and Full Treatments of VSL Bromine Chemistry Within the CAM-Chem Chemistry-Climate Model.

ABSTRACT: Many Chemistry-Climate Models (CCMs) include a simplified treatment of brominated very short-lived (VSL^Br) species by assuming CH₃Br as a surrogate for VSL^Br. However, neglecting a comprehensive treatment of VSL^Br 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^Br 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^Br photochemistry, including sea-salt aerosol dehalogenation and heterogeneous recycling on

SUBMITTER: Fernandez RP 

PROVIDER: S-EPMC7988532 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature