DOI: 10.1016/j.gloplacha.2015.02.011
论文题名: Drake Passage and Central American Seaway controls on the distribution of the oceanic carbon reservoir
作者: Fyke J.G. ; D'Orgeville M. ; Weaver A.J.
刊名: Global and Planetary Change
ISSN: 0921-8181
出版年: 2015
卷: 128 起始页码: 72
结束页码: 82
语种: 英语
英文关键词: Carbon cycle
; Ocean gateways
; Oceanography
Scopus关键词: Carbon
; Ocean currents
; Reservoirs (water)
; Antarctic Circumpolar Currents
; Atlantic meridional overturning circulations
; Carbon cycles
; Dissolved inorganic carbon
; Equatorial Pacific
; Global distribution
; Low concentrations
; Ocean gateway
; Oceanography
; carbon cycle
; concentration (composition)
; dissolved inorganic carbon
; global change
; oceanic circulation
; oceanic convection
; overturn
; Central America
; Drake Passage
英文摘要: A coupled carbon/climate model is used to explore the impact of Drake Passage opening and Central American Seaway closure on the distribution of carbon in the global oceans. We find that gateway evolution likely played an important role in setting the modern day distribution of oceanic dissolved inorganic carbon (DIC), which is currently characterized by relatively low concentrations in the Atlantic Ocean, and high concentrations in the Southern, Indian, and Pacific oceans. In agreement with previous studies, we find a closed Drake Passage in the presence of an open Central American Seaway results in suppressed Atlantic meridional overturning and enhanced southern hemispheric deep convection. Opening of the Drake Passage triggers Antarctic Circumpolar Current flow and a weak Atlantic meridional overturning circulation (AMOC). Subsequent Central American Seaway closure reinforces the AMOC while also stagnating equatorial Pacific subsurface waters. These gateway-derived oceanographic changes are reflected in large shifts to the global distribution of DIC. An initially closed Drake Passage results in high DIC concentrations in the Atlantic and Arctic oceans, and lower DIC concentrations in the Pacific/Indian/Southern oceans. Opening Drake Passage reverses this gradient by lowering mid-depth Atlantic and Arctic DIC concentrations and raising deep Pacific/Indian/Southern Ocean DIC concentrations. Central American Seaway closure further reinforces this trend through additional Atlantic mid-depth DIC decreases, as well as Pacific mid-depth DIC concentration increases, with the net effect being a transition to a modern distribution of oceanic DIC. © 2015. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84924663885&doi=10.1016%2fj.gloplacha.2015.02.011&partnerID=40&md5=069069fb60f2f2b47cbd2ac6a9cfa6f9
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/11535
Appears in Collections: 全球变化的国际研究计划 气候变化与战略
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作者单位: Theoretical Division, Los Alamos National LaboratoryNM, United States
Recommended Citation:
Fyke J.G.,D'Orgeville M.,Weaver A.J.. Drake Passage and Central American Seaway controls on the distribution of the oceanic carbon reservoir[J]. Global and Planetary Change,2015-01-01,128.