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Published (Version of record)CC BY V4.0, Open Access
Published (Version of record)CC BY V4.0, Open
Journal article
Modelling the influence of coral-reef-derived dimethylsulfide on the atmosphere of the Great Barrier Reef, Australia
Frontiers in Marine Science, Vol.9, pp.1-13
12/08/2022
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Source: InCites
Abstract
Marine dimethylsulfide (DMS) is an important source of natural sulfur to the atmosphere, with potential implications for the Earth’s radiative balance. Coral reefs are important regional sources of DMS, yet their contribution is not accounted for in global DMS climatologies or in model simulations. This study accounts for coral-reef-derived DMS and investigates its influence on the atmosphere of the Great Barrier Reef (GBR), Australia, using the Australian Community Climate and Earth System Simulator Atmospheric Model version 2 (ACCESS-AM2). A climatology of seawater surface DMS (DMSw) concentration in the GBR and an estimate of direct coral-to-air DMS flux during coral exposure to air at low tide are incorporated into the model, increasing DMS emissions from the GBR region by 0.02 Tg yr-1. Inclusion of coral-reef-derived DMS increased annual mean atmospheric DMS concentration over north-eastern Australia by 29%, contributing to an increase in gas-phase sulfate aerosol precursors of up to 18% over the GBR. The findings suggest that the GBR is an important regional source of atmospheric sulfur, with the potential to influence local-scale aerosol-cloud processes. However, no influence on sulfate aerosol mass or number concentration was detected, even with a reduction in anthropogenic sulfur dioxide emissions, indicating that DMS may not significantly influence the regional atmosphere at monthly, annual or large spatial scales. Further research is needed to improve the representation of coral-reef-derived DMS in climate models and determine its influence on local, sub-daily aerosol-cloud processes, for which observational studies suggest that DMS may play a more important role.
Details
- Title
- Modelling the influence of coral-reef-derived dimethylsulfide on the atmosphere of the Great Barrier Reef, Australia
- Creators
- Rebecca L. Jackson - Commonwealth Scientific and Industrial Research OrganisationMatthew T. Woodhouse - CSIRO Oceans and AtmosphereAlbert J. Gabric - Griffith UniversityRoger A. Cropp - Griffith UniversityHilton B. Swan - Southern Cross UniversityElisabeth S. M. Deschaseaux - Southern Cross UniversityHaydn Trounce - Queensland University of Technology
- Publication Details
- Frontiers in Marine Science, Vol.9, pp.1-13
- Publisher
- Frontiers Research Foundation
- Grant note
- Research undertaken on Marine National Facility RV Investigator voyage IN2016_V05 (RVI) and the work of G. B. Jones, ED and HS at Heron Island was supported by Australian Research Council Discovery Project grant DP150101649 ‘The Great Barrier Reef as a significant source of climatically relevant aerosol particles’. RJ was supported by an Australian Government Research Training Program Scholarship, Commonwealth Scientific and Industrial Research Organisation post-graduate scholarship, and the Griffith University School of Environment and Science.
- Identifiers
- 991013044513002368
- Copyright
- Copyright © 2022 Jackson, Woodhouse, Gabric, Cropp, Swan, Deschaseaux and Trounce. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
- Academic Unit
- Centre for Coastal Biogeochemistry; Faculty of Science and Engineering
- Language
- English
- Resource Type
- Journal article