气候变化领域集成服务门户(CCPortal): Hydrogen-nitrogen greenhouse warming in earth's early atmosphere

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DOI	10.1126/science.1225759
	Hydrogen-nitrogen greenhouse warming in earth's early atmosphere
	Wordsworth R.; Pierrehumbert R.
发表日期	2013
ISSN	0036-8075
起始页码	64
结束页码	67
卷号	339 期号:6115
英文摘要	Understanding how Earth has sustained surface liquid water throughout its history remains a key challenge, given that the Sun's luminosity was much lower in the past. Here we show that with an atmospheric composition consistent with the most recent constraints, the early Earth would have been significantly warmed by H2-N2 collision-induced absorption. With two to three times the present-day atmospheric mass of N2 and a H 2 mixing ratio of 0.1, H2-N2 warming would be sufficient to raise global mean surface temperatures above 0°C under 75% of present-day solar flux, with CO2 levels only 2 to 25 times the present-day values. Depending on their time of emergence and diversification, early methanogens may have caused global cooling via the conversion of H 2 and CO2 to CH4, with potentially observable consequences in the geological record.
英文关键词	hydrogen; nitrogen; absorption; carbon dioxide; chemical composition; geological record; greenhouse effect; hydrogen; methane; mixing ratio; nitrogen; paleoatmosphere; surface temperature; warming; article; astronomy; atmosphere; environmental parameters; greenhouse effect; pressure; priority journal
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246061
作者单位	Department of Geological Sciences, University of Chicago, Chicago, IL 60637, United States
推荐引用方式 GB/T 7714	Wordsworth R.,Pierrehumbert R.. Hydrogen-nitrogen greenhouse warming in earth's early atmosphere[J],2013,339(6115).
APA	Wordsworth R.,&Pierrehumbert R..(2013).Hydrogen-nitrogen greenhouse warming in earth's early atmosphere.Science,339(6115).
MLA	Wordsworth R.,et al."Hydrogen-nitrogen greenhouse warming in earth's early atmosphere".Science 339.6115(2013).