气候变化领域集成服务门户(CCPortal): Large Contribution of Pteropods to Shallow CaCO3 Export

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DOI	10.1029/2018GB006110
	Large Contribution of Pteropods to Shallow CaCO3 Export
	Buitenhuis E.T.; Le Quéré C.; Bednaršek N.; Schiebel R.
发表日期	2019
ISSN	0886-6236
EISSN	1944-9224
起始页码	458
结束页码	468
卷号	33 期号:3
英文摘要	The literature on the relative contributions of pelagic calcifying taxa to the global ocean export of CaCO3 is divided. Studies based on deep sediment trap data tend to argue that either foraminifers or coccolithophores, both calcite producers, dominate export. However, the compilations of biomass observations for pteropods, coccolithophores, and foraminifers instead show that pteropods dominate the global ocean calcifier biomass and therefore likely also carbonate export. Here we present a new global ocean biogeochemical model that explicitly represents these three groups of pelagic calcifiers. We synthesize databases of the physiology of the three groups to parameterize the model and then tune the unconstrained parameters to reproduce the observations of calcifier biomass and CaCO3 export. The model can reproduce both these observational databases; however, substantial dissolution of aragonite above the aragonite saturation horizon is required to do so. We estimate a contribution of pteropods to shallow (100 m) export of CaCO3 of at least 33% and to pelagic calcification of up to 89%. The high production-high dissolution configuration that shows closest agreement with all the observations has a CaCO3 production of 4.7 Pg C/year but CaCO3 export at 100 m of only 0.6 Pg C/year. ©2019. American Geophysical Union. All Rights Reserved.
语种	英语
scopus关键词	aragonite; biogeochemical cycle; calcification; calcite; calcium carbonate; dissolution; echinococcosis; foraminifera; global ocean; sediment trap; Foraminifera; Haptophyceae; Pteropoda
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/129735
作者单位	Tyndall Centre for Climate Change Research, School of Environmental Sciences, University of East Anglia, Norwich, United Kingdom; Southern California Coastal Water Research Authority, Costa Mesa, CA, United States; Department of Climate Geochemistry, Max Planck Institute for Chemistry, Mainz, Germany
推荐引用方式 GB/T 7714	Buitenhuis E.T.,Le Quéré C.,Bednaršek N.,et al. Large Contribution of Pteropods to Shallow CaCO3 Export[J],2019,33(3).
APA	Buitenhuis E.T.,Le Quéré C.,Bednaršek N.,&Schiebel R..(2019).Large Contribution of Pteropods to Shallow CaCO3 Export.Global Biogeochemical Cycles,33(3).
MLA	Buitenhuis E.T.,et al."Large Contribution of Pteropods to Shallow CaCO3 Export".Global Biogeochemical Cycles 33.3(2019).