气候变化领域集成服务门户(CCPortal): Coral-reef-derived dimethyl sulfide and the climatic impact of the loss of coral reefs

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DOI	10.5194/acp-21-5883-2021
	Coral-reef-derived dimethyl sulfide and the climatic impact of the loss of coral reefs
	Fiddes S.L.; Woodhouse M.T.; Lane T.P.; Schofield R.
发表日期	2021
ISSN	1680-7316
起始页码	5883
结束页码	5903
卷号	21 期号:8
英文摘要	Dimethyl sulfide (DMS) is a naturally occurring aerosol precursor gas which plays an important role in the global sulfur budget, aerosol formation and climate. While DMS is produced predominantly by phytoplankton, recent observational literature has suggested that corals and their symbionts produce a comparable amount of DMS, which is unaccounted for in models. It has further been hypothesised that the coral reef source of DMS may modulate regional climate. This hypothesis presents a particular concern given the current threat to coral reefs under anthropogenic climate change. In this paper, a global climate model with online chemistry and aerosol is used to explore the influence of coral-reef-derived DMS on atmospheric composition and climate. A simple representation of coral-reef-derived DMS is developed and added to a common DMS surface water climatology, resulting in an additional flux of 0.3 Tg yr-1 S, or 1.7 % of the global sulfur flux from DMS. By comparing the differences between both nudged and free-running ensemble simulations with and without coral-reef-derived DMS, the influence of coral-reef-derived DMS on regional climate is quantified. In the Maritime Continent-Australian region, where the highest density of coral reefs exists, a small decrease in nucleation- and Aitken-mode aerosol number concentration and mass is found when coral reef DMS emissions are removed from the system. However, these small responses are found to have no robust effect on regional climate via direct and indirect aerosol effects. This work emphasises the complexities of the aerosol-climate system, and the limitations of current modelling capabilities are highlighted, in particular surrounding convective responses to changes in aerosol. In conclusion, we find no robust evidence that coral-reef-derived DMS influences global and regional climate. © Author(s) 2021.
语种	英语
scopus关键词	aerosol; climate effect; climate modeling; convective system; coral reef; dimethylsulfide; global climate; Australia; Anthozoa
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246966
作者单位	Australian-German Climate and Energy College, University of Melbourne, Parkville, VIC, Australia; ARC Centre of Excellence for Climate System Science, School of Earth Sciences, University of Melbourne, Parkville, VIC, Australia; Climate Science Centre, Oceans and Atmosphere, Commonwealth Scientific and Industrial Research Organisation, Aspendale, SA, Australia; ARC Centre of Excellence for Climate Extremes, School of Earth Sciences, University of Melbourne, Parkville, VIC, Australia; Australian Antarctic Program Partnership, Institute of Marine and Antarctic Studies, University of Tasmania, Hobart, TAS, Australia
推荐引用方式 GB/T 7714	Fiddes S.L.,Woodhouse M.T.,Lane T.P.,et al. Coral-reef-derived dimethyl sulfide and the climatic impact of the loss of coral reefs[J],2021,21(8).
APA	Fiddes S.L.,Woodhouse M.T.,Lane T.P.,&Schofield R..(2021).Coral-reef-derived dimethyl sulfide and the climatic impact of the loss of coral reefs.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(8).
MLA	Fiddes S.L.,et al."Coral-reef-derived dimethyl sulfide and the climatic impact of the loss of coral reefs".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.8(2021).