DOI: 10.1002/2017GB005809
论文题名: An Analytical Framework for the Steady State Impact of Carbonate Compensation on Atmospheric CO2
作者: Omta A.W. ; Ferrari R. ; McGee D.
刊名: Global Biogeochemical Cycles
ISSN: 0886-6236
EISSN: 1944-9224
出版年: 2018
卷: 32, 期: 4 语种: 英语
英文关键词: anthropogenic effect
; atmosphere-ocean coupling
; burial diagenesis
; calcium carbonate
; carbon cycle
; deep sea
; glacial-interglacial cycle
; organic matter
; sediment chemistry
; water temperature
学科: carbon cycle
; carbonate compensation
; glacial-interglacial
; ocean temperature
中文摘要: 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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160239
Appears in Collections: 气候变化与战略
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作者单位: Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, United States
Recommended Citation:
Omta A.W.,Ferrari R.,McGee D.. An Analytical Framework for the Steady State Impact of Carbonate Compensation on Atmospheric CO2[J]. Global Biogeochemical Cycles,2018-01-01,32(4)