气候变化领域集成服务门户(CCPortal): Long-term climate forcing by atmospheric oxygen concentrations

CCPortal

DOI	10.1126/science.1260670
	Long-term climate forcing by atmospheric oxygen concentrations
	Poulsen C.J.; Tabor C.; White J.D.
发表日期	2015
ISSN	0036-8075
起始页码	1238
结束页码	1241
卷号	348 期号:6240
英文摘要	The percentage of oxygen in Earth's atmosphere varied between 10% and 35% throughout the Phanerozoic. These changes have been linked to the evolution, radiation, and size of animals but have not been considered to affect climate. We conducted simulations showing that modulation of the partial pressure of oxygen (pO2), as a result of its contribution to atmospheric mass and density, influences the optical depth of the atmosphere. Under low pO2 and a reduced-density atmosphere, shortwave scattering by air molecules and clouds is less frequent, leading to a substantial increase in surface shortwave forcing. Through feedbacks involving latent heat fluxes to the atmosphere and marine stratus clouds, surface shortwave forcing drives increases in atmospheric water vapor and global precipitation, enhances greenhouse forcing, and raises global surface temperature. Our results implicate pO2 as an important factor in climate forcing throughout geologic time. Copyright 2015 by the American Association for the Advancement of Science
英文关键词	oxygen; atmospheric chemistry; climate forcing; latent heat flux; optical depth; oxygen; partial pressure; Phanerozoic; simulation; air; Article; atmosphere; carbon dioxide tension; Cenomanian; climate; climate change; cloud; density; environmental temperature; geological time; greenhouse; mass; modulation; molecular weight; molecule; optical depth; oxygen concentration; precipitation; pressure; priority journal; sea level; simulation; surface property; water vapor; Animalia
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/245127
作者单位	Department of Earth and Environmental Sciences, University of Michigan, Ann Arbor, MI 48109, United States; Department of Biology, Baylor University, Waco, TX 76798, United States
推荐引用方式 GB/T 7714	Poulsen C.J.,Tabor C.,White J.D.. Long-term climate forcing by atmospheric oxygen concentrations[J],2015,348(6240).
APA	Poulsen C.J.,Tabor C.,&White J.D..(2015).Long-term climate forcing by atmospheric oxygen concentrations.Science,348(6240).
MLA	Poulsen C.J.,et al."Long-term climate forcing by atmospheric oxygen concentrations".Science 348.6240(2015).