Journal article
The Flux and Emission of Dimethylsulfide From the Great Barrier Reef Region and Potential Influence on the Climate of NE Australia
Journal of Geophysical Research: Atmospheres, Vol.123(24), pp.13,835-13,856
27/12/2018
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Source: InCites
Abstract
Concentrations of dimethylsulfoniopropionate (DMSP), dimethylsulfide (DMS), and DMS flux are reported for the Great Barrier Reef (GBR), Great Barrier Reef Lagoon (GBRL), and Coral Sea. Generally higher concentrations of dimethylsulfoniopropionate and DMS occurred in coral reef waters, compared with GBRL concentrations. DMS flux from GBR coral reefs in summer ranged from nondetectable to 153 μmol m−2 d−1 (mean 6.4), while winter fluxes ranged from 0.02 to 15 μmol m−2 d−1 (mean 2.4). No significant seasonal difference in DMS flux occurred for the GBRL. High DMSw concentrations and DMS fluxes periodically occur at coral reefs during very low tides and elevated sea surface temperatures (SSTs). For the GBRL and GBR coral reefs there was a significant correlation between seawater DMSw concentrations and SST (p < 0.001), up to temperatures of 30 °C. During coral bleaching DMS flux from reefs almost completely shuts down when SSTs are >30 °C. The GBRL and associated coral reefs emit 439 and 32 MmolS per year, respectively. Cyclones on average produce 170 MmolS to the GBR atmosphere in summer. This amount can markedly increase during severe cyclones such as severe tropical Cyclone Debbie in March 2017. Overall, the annual DMS emission estimate from the GBRL and coral reefs in the GBR is 0.64 GmolS, with cyclones contributing 27% or greater of the annual emission estimate, depending on the cyclone intensity. Oxidation of atmospheric DMS can potentially affect solar radiation, SSTs, low-level cloud cover, and rainfall causing cooling and warming of the climate in the GBR region as recent modeling predicts.
Details
- Title
- The Flux and Emission of Dimethylsulfide From the Great Barrier Reef Region and Potential Influence on the Climate of NE Australia
- Creators
- Graham Jones - Southern Cross UniversityMark Curran - Antarctic Climate and Ecosystems Cooperative Research CentreElisabeth Deschaseaux - Southern Cross UniversityYuko Omori - University of TsukubaHiroshi Tanimoto - National Institute of Environmental StudiesHilton Swan - Southern Cross UniversityBradley Eyre - Southern Cross UniversityJohn Ivey - Southern Cross UniversityErin McParland - University of Southern CaliforniaAlbert Gabric - Griffith UniversityRoger Cropp - Griffith University
- Publication Details
- Journal of Geophysical Research: Atmospheres, Vol.123(24), pp.13,835-13,856
- Publisher
- Wiley-Blackwell Publishing, Inc.
- Number of pages
- 22
- Grant note
- Australian Research Council (ARC). Grant Number: DP 150102092 ARC Discovery Project. Grant Numbers: DP150102092, DP150101649 National Ecotourism Southern Cross University James Cook University
- Identifiers
- 991012986298402368
- Copyright
- ©2018. American Geophysical Union. All Rights Reserved.
- Academic Unit
- Science; Faculty of Science and Engineering; Centre for Coastal Biogeochemistry
- Language
- English
- Resource Type
- Journal article