气候变化领域集成服务门户(CCPortal): Coral Reef Emissions of Atmospheric Dimethylsulfide and the Influence on Marine Aerosols in the Southern Great Barrier Reef, Australia

CCPortal

DOI	10.1029/2019JD031837
	Coral Reef Emissions of Atmospheric Dimethylsulfide and the Influence on Marine Aerosols in the Southern Great Barrier Reef, Australia
	Jackson R.L.; Gabric A.J.; Woodhouse M.T.; Swan H.B.; Jones G.B.; Cropp R.; Deschaseaux E.S.M.
发表日期	2020
ISSN	2169897X
卷号	125 期号:7
英文摘要	Variability in atmospheric dimethylsulfide (DMSa) and the potential influence on atmospheric aerosols was investigated at Heron Island in the southern Great Barrier Reef (GBR), Australia. This work compiles previously published DMSa data (reported in Swan, Jones, Deschaseaux, & Eyre, 2017, https://doi.org/10.1007/s00216-017-0385-8), with additional surveys of DMSa, atmospheric particle number concentration, and other oceanic and atmospheric data sets. DMSa was higher in summer (mean 3.2 nmol m−3/78 ppt) than winter (mean 1.3 nmol m−3/32 ppt), reflective of seasonal shifts in phytoplankton biomass and emissions from corals in the southern GBR. Seasonally extreme spikes in DMSa were detected during low tide and low wind speed, supporting findings that the coral reef can be an important source of DMSa above background oceanic emissions. A significant link was present between DMSa and aerosol concentration (ranging from 0.5 to 2.5 μm) during calm, daylight hours, when conditions were optimal for the local oxidation of DMSa to sulfate aerosol precursors. This link may reflect condensational growth of existing fine particles (< 0.5 μm), which is the dominant pathway by which biogenic trace gases influence aerosols in the marine boundary layer. Aerosol concentration significantly correlated with reduced surface solar irradiance and sea surface temperature, which is potential evidence of a local negative feedback mitigating coral physiological stress. These findings provide a step toward a better understanding of the processes influencing DMSa and aerosol concentrations and of the consequences for the local radiative balance over coral reefs; an increasingly important topic with ongoing ocean warming and coral bleaching. ©2020. The Authors.
英文关键词	coral reef; dimethylsulfide; feedback; marine aerosols; thermal stress
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186062
作者单位	School of Environment and Science, Griffith University, Gold Coast, QLD, Australia; Australian Rivers Institute, Griffith University, Gold Coast, QLD, Australia; School of Environment and Science, Griffith University, Nathan, QLD, Australia; Climate Science Centre, Oceans and Atmosphere, Commonwealth Scientific and Industrial Research Organisation, Aspendale, VIC, Australia; Centre for Coastal Biogeochemistry, School of Environment, Science and Engineering, Southern Cross University, Lismore, NSW, Australia
推荐引用方式 GB/T 7714	Jackson R.L.,Gabric A.J.,Woodhouse M.T.,et al. Coral Reef Emissions of Atmospheric Dimethylsulfide and the Influence on Marine Aerosols in the Southern Great Barrier Reef, Australia[J],2020,125(7).
APA	Jackson R.L..,Gabric A.J..,Woodhouse M.T..,Swan H.B..,Jones G.B..,...&Deschaseaux E.S.M..(2020).Coral Reef Emissions of Atmospheric Dimethylsulfide and the Influence on Marine Aerosols in the Southern Great Barrier Reef, Australia.Journal of Geophysical Research: Atmospheres,125(7).
MLA	Jackson R.L.,et al."Coral Reef Emissions of Atmospheric Dimethylsulfide and the Influence on Marine Aerosols in the Southern Great Barrier Reef, Australia".Journal of Geophysical Research: Atmospheres 125.7(2020).