DOI: 10.1016/j.epsl.2018.05.038
Scopus记录号: 2-s2.0-85047612861
论文题名: Weak overturning circulation and high Southern Ocean nutrient utilization maximized glacial ocean carbon
作者: Muglia J. ; Skinner L.C. ; Schmittner A.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 496 起始页码: 47
结束页码: 56
语种: 英语
英文关键词: carbon cycle
; Last Glacial Maximum
; ocean circulation
Scopus关键词: Digital storage
; Glacial geology
; Iron
; Isotopes
; Repair
; Atlantic meridional overturning circulations
; Carbon cycles
; Circulation changes
; Last Glacial Maximum
; Nutrient utilization
; Ocean circulation
; Overturning circulation
; Three-dimensional model
; Oceanography
; carbon cycle
; carbon sequestration
; glacier
; Last Glacial Maximum
; nutrient
; overturn
; paleoceanography
; reconstruction
; Southern Ocean
英文摘要: Circulation changes have been suggested to play an important role in the sequestration of atmospheric CO2 in the glacial ocean. However, previous studies have resulted in contradictory results regarding the strength of the Atlantic Meridional Overturning Circulation (AMOC) and three-dimensional, quantitative reconstructions of the glacial ocean constrained by multiple proxies remain scarce. Here we simulate the modern and glacial ocean using a coupled physical-biogeochemical, global, three-dimensional model constrained simultaneously by δ13C, radiocarbon, and δ15N to explore the effects of AMOC differences and Southern Ocean iron fertilization on the distributions of these isotopes and ocean carbon storage. We show that δ13C and radiocarbon data sparsely sampled at the locations of existing glacial sediment cores can be used to reconstruct the modern AMOC accurately. Applying this method to the glacial ocean we find that a surprisingly weak (6–9 Sv or about half of today's) and shallow AMOC maximizes carbon storage and best reproduces the sediment isotope data. Increasing the atmospheric soluble iron flux in the model's Southern Ocean intensifies export production, carbon storage, and further improves agreement with δ13C and δ15N reconstructions. Our best fitting simulation is a significant improvement compared with previous studies, and suggests that both circulation and export production changes were necessary to maximize carbon storage in the glacial ocean. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109789
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: College of Earth, Ocean and Atmospheric Sciences, Oregon State University, 104 CEOAS Administration Building, 101 SW 26th St, Corvallis, OR 97331, United States; Godwin Laboratory for Palaeoclimate Research, Department of Earth Sciences, Univ. of Cambridge, Cambridge, CB2 3EQ, United Kingdom
Recommended Citation:
Muglia J.,Skinner L.C.,Schmittner A.. Weak overturning circulation and high Southern Ocean nutrient utilization maximized glacial ocean carbon[J]. Earth and Planetary Science Letters,2018-01-01,496