| DOI: | 10.1002/2014GL059963
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| 论文题名: | Control of the glacial carbon budget by topographically induced mixing |
| 作者: | De Boer A.M.; Hogg A.M.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-10538
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| EISSN: | 1944-10269
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| 出版年: | 2014
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| 卷: | 41, 期:12 | | 起始页码: | 4277
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| 结束页码: | 4284
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| 语种: | 英语
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| Scopus关键词: | Carbon budgets
; carbon budget
; carbon dioxide
; deep water
; glaciation
; mixing
; topography
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| 英文摘要: | Evidence for the oceanic uptake of atmospheric CO2 during glaciations suggests that there was less production of southern origin deep water but, paradoxically, a larger volume of southern origin water than today. Here we demonstrate, using a theoretical box model, that the inverse relationship between volume and production rate of this water mass can be explained by invoking mixing rates in the deep ocean that are proportional to topographic outcropping area scaled with ocean floor slope. Furthermore, we show that the resulting profile, of a near-linear decrease in mixing intensity away from the bottom, generates a positive feedback on CO2 uptake that can initiate a glacial cycle. The results point to the importance of using topography-dependent mixing when studying the large-scale ocean circulation, especially in the paleo-intercomparisonmodels that have failed to produce the weaker and more voluminous bottom water of the Last Glacial Maximum. © 2014. The Authors. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84902302360&doi=10.1002%2f2014GL059963&partnerID=40&md5=d9b20fe9e923449bca459355e6e344e9
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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/7802
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Bolin Centre for Climate Research, Department of Geological Sciences, Stockholm University, Stockholm, Sweden
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| Recommended Citation: | |
De Boer A.M.,Hogg A.M.. Control of the glacial carbon budget by topographically induced mixing[J]. Geophysical Research Letters,2014-01-01,41(12).
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