| DOI: | 10.1016/j.gloplacha.2014.04.004
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| 论文题名: | The role of ocean gateways on cooling climate on long time scales |
| 作者: | Sijp W.P.; von der Heydt A.S.; Dijkstra H.A.; Flögel S.; Douglas P.M.J.; Bijl P.K.
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| ISSN: | 0921-8525
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| 出版年: | 2014
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| 卷: | 119 | | 起始页码: | 1
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| 结束页码: | 22
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| 语种: | 英语
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| 英文关键词: | AMOC
; Cenozoic cooling trend
; Cloud feedbacks
; Deep ocean cooling
; Deep time climate model
; Eocene
; Eocene/Oligocene transition
; Greenhouse climate
; Icehouse climate
; Ocean circulation
; Ocean gateways
; Overturning circulation
; Polar amplification
; Polar warmth
; THC
; Thermal isolation
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| Scopus关键词: | Climate models
; Greenhouse gases
; Greenhouses
; Isotopes
; Ocean currents
; AMOC
; Cenozoic cooling
; Cloud feedbacks
; Deep ocean
; Eocene
; Eocene/Oligocene transition
; Greenhouse climates
; Icehouse climate
; Ocean circulation
; Ocean gateway
; Overturning circulation
; Polar amplifications
; Polar warmth
; THC
; Thermal isolation
; Glacial geology
; Cenozoic
; climate modeling
; cooling
; deep sea
; Eocene
; greenhouse gas
; overturn
; oxygen isotope
; paleogeography
; tectonic evolution
; Turonian
; Antarctic Circumpolar Current
; Southern Ocean
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| 英文摘要: | We examine ocean changes in response to changes in paleogeography from the Cretaceous to present in an intermediate complexity model and in the fully coupled CCSM3 model. Greenhouse gas concentrations are kept constant to allow a focus on effects arising from changing continental configurations. We find consistent and significant geography-related Cenozoic cooling arising from the opening of Southern Ocean (SO) gateways. Both models show significant deep ocean cooling arising from tectonic evolution alone. Simulations employing continental configurations associated with greenhouse climates, namely the Turonian and the Eocene simulations, systematically exhibit warm deep ocean temperatures at elevated pCO2 close to 10°C. In contrast, continental configurations associated with (later) icehouse climates are associated with cooler deep ocean temperatures at identical pCO2, arising from a progressive strengthening of the Antarctic Circumpolar Current. This suggests that a component of the Cenozoic benthic cooling trend recorded in oxygen isotopes could arise directly from changes in continental configuration, and so be partially decoupled from the Cenozoic greenhouse gas history. In this paper we will present our model results against the background of an extensive review of previous work on ocean gateways and additional modelling results from several other global climate models. © 2014 Elsevier B.V. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84901228064&doi=10.1016%2fj.gloplacha.2014.04.004&partnerID=40&md5=0dc7e6e6bed7b4a6aa2c756a7ad17abc
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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/11431
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| Appears in Collections: | 全球变化的国际研究计划
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作者单位: | ARC Centre of Excellence for Climate System Science, University of New South Wales, Sydney, NSW 2052, Australia
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| Recommended Citation: | |
Sijp W.P.,von der Heydt A.S.,Dijkstra H.A.,et al. The role of ocean gateways on cooling climate on long time scales[J],2014-01-01,119.
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