DOI: 10.1016/j.quascirev.2014.06.021
Scopus记录号: 2-s2.0-84903617870
论文题名: Synchronous records of pCO2 and δ14C suggest rapid, ocean-derived pCO2 fluctuations at the onset of Younger Dryas
作者: Steinthorsdottir M. ; de Boer A.M. ; Oliver K.I.C. ; Muschitiello F. ; Blaauw M. ; Reimer P.J. ; Wohlfarth B.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2014
卷: 99 起始页码: 84
结束页码: 96
语种: 英语
英文关键词: GENIE earth system model
; Lateglacial
; Ocean flushing event
; Radiocarbon
; Rapid climate change
; Stomatal proxy
; Younger dryas
Scopus关键词: Carbon dioxide
; Glacial geology
; Oceanography
; Testbeds
; GENIE Earth-system Model
; Lateglacial
; Ocean flushing event
; Radiocarbon
; Rapid climate change
; Stomatal proxy
; Younger Dryas
; Climate change
; air-sea interaction
; carbon dioxide
; carbon isotope
; climate variation
; concentration (composition)
; flushing
; ice core
; paleoatmosphere
; paleoclimate
; proxy climate record
; stomata
; temporal variation
; Younger Dryas
; Sweden
英文摘要: Just before the onset of the Younger Dryas (YD) cold event, several stomatal proxy-based pCO2 records have shown a sharp increase in atmospheric CO2 concentration (pCO2) of between ca50 and 100ppm, followed by a rapid decrease of similar or even larger magnitude. Here we compare one of these records, a high-resolution pCO2 record from southern Sweden, with the IntCal13 record of radiocarbon (δ14C). The two records show broadly synchronous fluctuations at the YD onset. Specifically, the IntCal13 record documents decreasing δ14C just before the YD onset when pCO2 peaks, consistent with a source of "old" CO2 from the deep ocean. We propose that this fluctuation occurred due to a major ocean flushing event. The cause of the flushing event remains speculative but could be related to the hypothesis of the glacial ocean as a thermobaric capacitor. We confirm that the earth system can produce such large multi-decadal timescale fluctuations in pCO2 through simulating an artificial ocean flushing event with the GENIE Earth System Model. We suggest that sharp transitions of pCO2 may have remained undetected so far in ice cores due to inter-firn gas exchange and time-averaging. The stomatal proxy record is a powerful complement to the ice core records for the study of rapid climate change. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60181
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Geological Sciences and Bolin Centre for Climate Research, Stockholm University, SE 109 61 Stockholm, Sweden; School of Ocean and Earth Science, National Oceanography Centre, University of Southampton, Southampton SO14 3ZH, United Kingdom; School of Geography, Archaeology and Palaeoecology, Queen's University Belfast, Belfast BT7 1NN, Northern Ireland, United Kingdom
Recommended Citation:
Steinthorsdottir M.,de Boer A.M.,Oliver K.I.C.,et al. Synchronous records of pCO2 and δ14C suggest rapid, ocean-derived pCO2 fluctuations at the onset of Younger Dryas[J]. Quaternary Science Reviews,2014-01-01,99