DOI: 10.1016/j.quascirev.2015.05.007
Scopus记录号: 2-s2.0-84935919405
论文题名: Southwest Pacific deep water carbonate chemistry linked to high southern latitude climate and atmospheric CO2 during the Last Glacial Termination
作者: Allen K.A. ; Sikes E.L. ; Hönisch B. ; Elmore A.C. ; Guilderson T.P. ; Rosenthal Y. ; Anderson R.F.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2015
卷: 122 起始页码: 180
结束页码: 191
语种: 英语
英文关键词: B/Ca
; Benthic foraminifera
; Carbon isotopes
; Glacial termination
; Ice age cycles
; Marine carbon cycle
Scopus关键词: Alkalinity
; Atmospheric structure
; Carbon
; Glacial geology
; Isotopes
; Trace elements
; Benthic foraminifera
; Carbon isotopes
; Glacial terminations
; Ice age
; Marine carbon cycle
; Atmospheric chemistry
; alkalinity
; atmospheric circulation
; benthic foraminifera
; biological pump
; boron
; calcium
; carbon cycle
; carbon dioxide
; carbonate
; climate variation
; deep water
; deglaciation
; Holocene
; inorganic carbon
; intermediate water
; isotopic composition
; Last Glacial
; Last Glacial Maximum
; paleoclimate
; Pleistocene
; sediment core
; stable isotope
; ventilation
; water mass
; Bay of Plenty
; New Zealand
; North Island
; Pacific Ocean
; Pacific Ocean (Southwest)
; Cibicidoides wuellerstorfi
; Foraminifera
英文摘要: A greater amount of CO2 was stored in the deep sea during glacial periods, likely via greater efficiency of the biologic pump and increased uptake by a more alkaline ocean. Reconstructing past variations in seawater carbonate ion concentration (a major component of alkalinity) enables quantification of the relative roles of different oceanic CO2 storage mechanisms and also places constraints on the timing, magnitude, and location of subsequent deep ocean ventilation. Here, we present a record of deep-water inorganic carbon chemistry since the Last Glacial Maximum (LGM; ~19-23 ka BP), derived from sediment core RR0503-83 raised from 1627 m in New Zealand's Bay of Plenty. The core site lies within the upper limit of southern-sourced Circumpolar Deep Water (CDW), just below the lower boundary of Antarctic Intermediate Water (AAIW). We reconstruct past changes in bottom water inorganic carbon chemistry from the trace element and stable isotopic composition of calcite shells of the epibenthic foraminifer Cibicidoides wuellerstorfi. A record of δCO32-(δCO32-=[CO32-]insitu-[CO32-]saturation) derived from the foraminiferal boron to calcium ratio (B/Ca) provides evidence for greater ice-age storage of respired CO2 and reveals abrupt deglacial shifts in [CO32-]insitu of up to 30 μmol/kg (5 times larger than the difference between average LGM and Holocene values). The rapidity of these changes suggests the influence of changing water mass structure and atmospheric circulation in addition to a decrease in CO2 content of interior waters. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59884
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Marine and Coastal Sciences, Rutgers University, New Brunswick, NJ, United States; Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, United States; Department of Earth Sciences, Durham University, Durham, United Kingdom; Lawrence Livermore National Laboratory, Livermore, CA, United States; Department of Ocean Sciences, University of California, Santa Cruz, CA, United States
Recommended Citation:
Allen K.A.,Sikes E.L.,Hönisch B.,et al. Southwest Pacific deep water carbonate chemistry linked to high southern latitude climate and atmospheric CO2 during the Last Glacial Termination[J]. Quaternary Science Reviews,2015-01-01,122