气候变化领域集成服务门户(CCPortal): Emission of biogenic volatile organic compounds from warm and oligotrophic seawater in the Eastern Mediterranean

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DOI	10.5194/acp-20-12741-2020
	Emission of biogenic volatile organic compounds from warm and oligotrophic seawater in the Eastern Mediterranean
	Dayan C.; Fredj E.; Misztal P.K.; Gabay M.; Guenther A.B.; Tas E.
发表日期	2020
ISSN	1680-7316
起始页码	12741
结束页码	12759
卷号	20 期号:21
英文摘要	Biogenic volatile organic compounds (BVOCs) from terrestrial vegetation and marine organisms contribute to photochemical pollution and affect the radiation budget, cloud properties and precipitation via secondary organic aerosol formation. Their emission from both marine and terrestrial ecosystems is substantially affected by climate change in ways that are currently not well characterized. The Eastern Mediterranean Sea was identified as a climate change "hot spot", making it a natural laboratory for investigating the impact of climate change on BVOC emissions from both terrestrial and marine vegetation. We quantified the mixing ratios of a suite of volatile organic compounds (VOCs), including isoprene, dimethyl sulfide (DMS), acetone, acetaldehyde and monoterpenes, at a mixed vegetation site ~ 4 km from the southeastern tip of the Levantine Basin, where the sea surface temperature (SST) maximizes and ultra-oligotrophic conditions prevail. The measurements were performed between July and October 2015 using a proton transfer reaction time-of-flight mass spectrometer (PTR-ToF-MS). The analyses were supported by the Model of Emissions of Gases and Aerosols from Nature (MEGAN v2.1). For isoprene and DMS mixing ratios, we identified a dominant contribution from the seawater. Our analyses further suggest a major contribution, at least for monoterpenes, from the seawater. Our results indicate that the Levantine Basin greatly contributes to isoprene emissions, corresponding with mixing ratios of up to ~ 9 ppbv several kilometers inland from the sea shore. This highlights the need to update air quality and climate models to account for the impact of SST on marine isoprene emission. The DMS mixing ratios were 1 to 2 orders of magnitude lower than those measured in 1995 in the same area, suggesting a dramatic decrease in emissions due to changes in the species composition induced by the rise in SST. © 2020 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	atmospheric chemistry; carbon emission; isoprene; photochemistry; sea surface temperature; seawater; terrestrial ecosystem; volatile organic compound
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/247422
作者单位	Department of Soil and Water Sciences, Robert H. Smith Faculty of Agriculture, Food and Environment, Hebrew University of Jerusalem, Rehovot, 7610001, Israel; Department of Computer Science, Jerusalem College of Technology, Jerusalem, 91160, Israel; Department of Civil, Architectural and Environmental Engineering, University of Texas at Austin, Austin, TX 78712, United States; Department of Earth System Science, University of California Irvine, Irvine, CA 92697, United States
推荐引用方式 GB/T 7714	Dayan C.,Fredj E.,Misztal P.K.,et al. Emission of biogenic volatile organic compounds from warm and oligotrophic seawater in the Eastern Mediterranean[J],2020,20(21).
APA	Dayan C.,Fredj E.,Misztal P.K.,Gabay M.,Guenther A.B.,&Tas E..(2020).Emission of biogenic volatile organic compounds from warm and oligotrophic seawater in the Eastern Mediterranean.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(21).
MLA	Dayan C.,et al."Emission of biogenic volatile organic compounds from warm and oligotrophic seawater in the Eastern Mediterranean".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.21(2020).