气候变化领域集成服务门户(CCPortal): Impacts of Shifts in Phytoplankton Community on Clouds and Climate via the Sulfur Cycle

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DOI	10.1029/2017GB005862
	Impacts of Shifts in Phytoplankton Community on Clouds and Climate via the Sulfur Cycle
	Wang S.; Maltrud M.E.; Burrows S.M.; Elliott S.M.; Cameron-Smith P.
发表日期	2018
ISSN	0886-6236
EISSN	1944-9224
起始页码	1005
结束页码	1026
卷号	32 期号:6
英文摘要	Dimethyl sulfide (DMS), primarily produced by marine organisms, contributes significantly to sulfate aerosol loading over the ocean after being oxidized in the atmosphere. In addition to exerting a direct radiative effect, the resulting aerosol particles act as cloud condensation nuclei, modulating cloud properties and extent, with impacts on atmospheric radiative transfer and climate. Thus, changes in pelagic ecosystems, such as phytoplankton physiology and community structure, may influence organosulfur production, and subsequently affect climate via the sulfur cycle. A fully coupled Earth system model, including explicit marine ecosystems and the sulfur cycle, is used here to investigate the impacts of changes associated with individual phytoplankton groups on DMS emissions and climate. Simulations show that changes in phytoplankton community structure, DMS production efficiency, and interactions of multielement biogeochemical cycles can all lead to significant differences in DMS transfer to the atmosphere. Subsequent changes in sulfate aerosol burden, cloud condensation nuclei number, and radiative effect are examined. We find the global annual mean cloud radiative effect shifts up to 0.21 W/m2, and the mean surface temperature increases up to 0.1 °C due to DMS production changes associated with individual phytoplankton group in simulations with radiative effects at the 2,100 levels under an 8.5 scenario. However, changes in DMS emissions, radiative effect, and surface temperature are more intensive on regional scales. Hence, we speculate that major uncertainties associated with future marine sulfur cycling will involve strong region-to-region climate shifts. Further understanding of marine ecosystems and the relevant phytoplankton-aerosol-climate linkage are needed for improving climate projections. ©2018. The Authors.
英文关键词	climate impact; community composition change; dimethyl sulfide; phytoplankton
语种	英语
scopus关键词	aerosol; climate effect; cloud; cloud condensation nucleus; cloud radiative forcing; community composition; dimethylsulfide; phytoplankton; sulfide; sulfur cycle; surface temperature; uncertainty analysis
来源期刊	Global Biogeochemical Cycles
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/129819
作者单位	The Climate Ocean and Sea Ice Modeling Group, Los Alamos National Laboratory, Los Alamos, NM, United States; Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA, United States; Atmospheric, Earth and Energy Division, Lawrence Livermore National Laboratory, Livermore, CA, United States
推荐引用方式 GB/T 7714	Wang S.,Maltrud M.E.,Burrows S.M.,et al. Impacts of Shifts in Phytoplankton Community on Clouds and Climate via the Sulfur Cycle[J],2018,32(6).
APA	Wang S.,Maltrud M.E.,Burrows S.M.,Elliott S.M.,&Cameron-Smith P..(2018).Impacts of Shifts in Phytoplankton Community on Clouds and Climate via the Sulfur Cycle.Global Biogeochemical Cycles,32(6).
MLA	Wang S.,et al."Impacts of Shifts in Phytoplankton Community on Clouds and Climate via the Sulfur Cycle".Global Biogeochemical Cycles 32.6(2018).