| DOI: | 10.1029/2012GL054231
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| 论文题名: | Carbonate dissolution rates at the deep ocean floor |
| 作者: | Boudreau B.P.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9301
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| EISSN: | 1944-9032
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| 出版年: | 2013
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| 卷: | 40, 期:4 | | 起始页码: | 744
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| 结束页码: | 748
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| 语种: | 英语
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| 英文关键词: | calcite
; dissolution
; kinetics
; mass transfer
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| Scopus关键词: | Boundary layers
; Calcite
; Calcium carbonate
; Carbon dioxide
; Enzyme kinetics
; Kinetics
; Mass transfer
; Seawater
; Sedimentology
; Sediments
; Solute transport
; Sulfur compounds
; Benthic boundary layers
; Boundary layer effects
; Boundary layer transfers
; Calcite dissolution
; Depth distribution
; Experimental datum
; Sediment water interface
; Solubility product
; Dissolution
; calcite
; carbon dioxide
; carbonate
; deep sea
; diagenesis
; dissolution
; mass balance
; numerical model
; saturation
; seafloor
; sediment chemistry
; sediment-water interface
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| 英文摘要: | This paper reexamines experimental data on the seawater dissolution of CaCO3-bearing sediment beds to establish that the dependence of the calcite dissolution rate is linearly dependent on the calcite saturation state of the overlying water. This linearity is inherent to the original data and is not the result of an error in the solubility product for calcite. A comparison between these linear kinetics and the rate of solute transport across the benthic boundary layer further reveals that the overall rate of dissolution at ocean depths below the saturation horizon is controlled by boundary layer transfer. A carbonate mass-balance model for the sediment-water interface, which includes both kinetics and boundary layer effects, predictively reproduces the currently observed CaCO3 depth distribution for two test areas in the oceans. These findings allow important simplifications in modeling CO 2 neutralization in the oceans. Key Points Seafloor CaCO3 dissolution is linear Seafloor CaCO3 dissolution is mass-transfer controlled Diagenetic model unneeded for CaCO3 dissolution ©2012. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84878200497&doi=10.1029%2f2012GL054231&partnerID=40&md5=3d8fb850c903dfeca1c9c2c3e684dae9
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/6565
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Department of Oceanography, Dalhousie University, Halifax, NS B3H4R2, Canada
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| Recommended Citation: | |
Boudreau B.P.. Carbonate dissolution rates at the deep ocean floor[J]. Geophysical Research Letters,2013-01-01,40(4).
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