气候变化领域集成服务门户(CCPortal): An Analytical Framework for the Steady State Impact of Carbonate Compensation on Atmospheric CO2

CCPortal

DOI	10.1002/2017GB005809
	An Analytical Framework for the Steady State Impact of Carbonate Compensation on Atmospheric CO2
	Omta A.W.; Ferrari R.; McGee D.
发表日期	2018
ISSN	0886-6236
EISSN	1944-9224
起始页码	720
结束页码	735
卷号	32 期号:4
英文摘要	The deep-ocean carbonate ion concentration impacts the fraction of the marine calcium carbonate production that is buried in sediments. This gives rise to the carbonate compensation feedback, which is thought to restore the deep-ocean carbonate ion concentration on multimillennial timescales. We formulate an analytical framework to investigate the impact of carbonate compensation under various changes in the carbon cycle relevant for anthropogenic change and glacial cycles. Using this framework, we show that carbonate compensation amplifies by 15–20% changes in atmospheric CO2 resulting from a redistribution of carbon between the atmosphere and ocean (e.g., due to changes in temperature, salinity, or nutrient utilization). A counterintuitive result emerges when the impact of organic matter burial in the ocean is examined. The organic matter burial first leads to a slight decrease in atmospheric CO2 and an increase in the deep-ocean carbonate ion concentration. Subsequently, enhanced calcium carbonate burial leads to outgassing of carbon from the ocean to the atmosphere, which is quantified by our framework. Results from simulations with a multibox model including the minor acids and bases important for the ocean-atmosphere exchange of carbon are consistent with our analytical predictions. We discuss the potential role of carbonate compensation in glacial-interglacial cycles as an example of how our theoretical framework may be applied. ©2018. American Geophysical Union. All Rights Reserved.
英文关键词	carbon cycle; carbonate compensation; glacial-interglacial; ocean temperature
语种	英语
scopus关键词	anthropogenic effect; atmosphere-ocean coupling; burial diagenesis; calcium carbonate; carbon cycle; deep sea; glacial-interglacial cycle; organic matter; sediment chemistry; water temperature
来源期刊	Global Biogeochemical Cycles
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/129835
作者单位	Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, United States
推荐引用方式 GB/T 7714	Omta A.W.,Ferrari R.,McGee D.. An Analytical Framework for the Steady State Impact of Carbonate Compensation on Atmospheric CO2[J],2018,32(4).
APA	Omta A.W.,Ferrari R.,&McGee D..(2018).An Analytical Framework for the Steady State Impact of Carbonate Compensation on Atmospheric CO2.Global Biogeochemical Cycles,32(4).
MLA	Omta A.W.,et al."An Analytical Framework for the Steady State Impact of Carbonate Compensation on Atmospheric CO2".Global Biogeochemical Cycles 32.4(2018).