气候变化领域集成服务门户(CCPortal): Atmospheric PCO2 perturbations associated with the central atlantic magmatic province

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DOI	10.1126/science.1199011
	Atmospheric PCO2 perturbations associated with the central atlantic magmatic province
	Schaller M.F.; Wright J.D.; Kent D.V.
发表日期	2011
ISSN	0036-8075
起始页码	1404
结束页码	1409
卷号	331 期号:6023
英文摘要	The effects of a large igneous province on the concentration of atmospheric carbon dioxide (PCO2) are mostly unknown. In this study, we estimate PCO2 from stable isotopic values of pedogenic carbonates interbedded with volcanics of the Central Atlantic Magmatic Province (CAMP) in the Newark Basin, eastern North America. We find pre-CAMP PCO2 values of ∼2000 parts per million (ppm), increasing to ∼4400 ppm immediately after the first volcanic unit, followed by a steady decrease toward pre-eruptive levels over the subsequent 300 thousand years, a pattern that is repeated after the second and third flow units. We interpret each PCO2 increase as a direct response to magmatic activity (primary outgassing or contact metamorphism). The systematic decreases in PCO2 after each magmatic episode probably reflect consumption of atmospheric CO2 by weathering of silicates, stimulated by fresh CAMP volcanics.
英文关键词	carbon dioxide; carbon dioxide; carbonate; concentration (composition); isotopic analysis; magmatism; perturbation; silicate; stable isotope; volcano; weathering; article; carbon cycle; controlled atmosphere; priority journal; sedimentation rate; volcano; Atlantic Ocean; Atlantic Ocean (Central); Newark Basin; United States
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/245355
作者单位	Department of Earth and Planetary Sciences, Rutgers University, Piscataway, NJ 08854, United States; Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY 10964, United States
推荐引用方式 GB/T 7714	Schaller M.F.,Wright J.D.,Kent D.V.. Atmospheric PCO2 perturbations associated with the central atlantic magmatic province[J],2011,331(6023).
APA	Schaller M.F.,Wright J.D.,&Kent D.V..(2011).Atmospheric PCO2 perturbations associated with the central atlantic magmatic province.Science,331(6023).
MLA	Schaller M.F.,et al."Atmospheric PCO2 perturbations associated with the central atlantic magmatic province".Science 331.6023(2011).