气候变化领域集成服务门户(CCPortal): Arctic Amplification of Global Warming Strengthened by Sunlight Oxidation of Permafrost Carbon to CO2

CCPortal

DOI	10.1029/2020GL087085
	Arctic Amplification of Global Warming Strengthened by Sunlight Oxidation of Permafrost Carbon to CO2
	Bowen J.C.; Ward C.P.; Kling G.W.; Cory R.M.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:12
英文摘要	Once thawed, up to 15% of the ∼1,000 Pg of organic carbon (C) in arctic permafrost soils may be oxidized to carbon dioxide (CO2) by 2,100, amplifying climate change. However, predictions of this amplification strength ignore the oxidation of permafrost C to CO2 in surface waters (photomineralization). We characterized the wavelength dependence of permafrost dissolved organic carbon (DOC) photomineralization and demonstrate that iron catalyzes photomineralization of old DOC (4,000–6,300 a BP) derived from soil lignin and tannin. Rates of CO2 production from photomineralization of permafrost DOC are twofold higher than for modern DOC. Given that model predictions of future net loss of ecosystem C from thawing permafrost do not include the loss of CO2 to the atmosphere from DOC photomineralization, current predictions of an average of 208 Pg C loss by 2,299 may be too low by ~14%. ©2020. The Authors.
英文关键词	Carbon dioxide; Forecasting; Global warming; Organic carbon; Oxidation; Thawing; Dissolved organic carbon; Model prediction; Net loss; Photomineralization; Wavelength dependence; Permafrost; amplification; carbon dioxide; carbon emission; dissolved organic carbon; global warming; lignin; oxidation; permafrost; photodegradation; solar radiation; thawing; wavelength; Carbon Dioxide; Forecasts; Oxidation; Permafrost; Production; Tannins; Thawing; Arctic
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170244
作者单位	Department of Earth and Environmental Sciences, University of Michigan, Ann Arbor, MI, United States; Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA, United States; Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI, United States
推荐引用方式 GB/T 7714	Bowen J.C.,Ward C.P.,Kling G.W.,et al. Arctic Amplification of Global Warming Strengthened by Sunlight Oxidation of Permafrost Carbon to CO2[J],2020,47(12).
APA	Bowen J.C.,Ward C.P.,Kling G.W.,&Cory R.M..(2020).Arctic Amplification of Global Warming Strengthened by Sunlight Oxidation of Permafrost Carbon to CO2.Geophysical Research Letters,47(12).
MLA	Bowen J.C.,et al."Arctic Amplification of Global Warming Strengthened by Sunlight Oxidation of Permafrost Carbon to CO2".Geophysical Research Letters 47.12(2020).