DOI: 10.1002/gbc.20060
Scopus记录号: 2-s2.0-84881154788
论文题名: On the potential role of marine calcifiers in glacial-interglacial dynamics
作者: Omta A ; W ; , Van Voorn G ; A ; K ; , Rickaby R ; E ; M ; , Follows M ; J
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2013
卷: 27, 期: 3 起始页码: 692
结束页码: 704
语种: 英语
英文关键词: autocatalysis
; calcifiers
; carbonate compensation
; glacial-interglacial
; sawtooth cycle
Scopus关键词: autocatalysis
; calcifiers
; Glacial interglacial transition
; glacial-interglacial
; Glacial-interglacial cycles
; Milankovitch forcing
; sawtooth cycle
; Temperature decrease
; Carbon dioxide
; Glacial geology
; alkalinity
; calcification
; carbon dioxide
; carbonate
; catalysis
; compensation
; glacial-interglacial cycle
; ice core
; marine environment
; oscillation
; paleoclimate
; paleoenvironment
; Antarctica
英文摘要: Ice core measurements have revealed a highly asymmetric cycle in Antarctic temperature and atmospheric CO2 over the last 800 kyr. Both CO 2 and temperature decrease over 100 kyr going into a glacial period and then rise steeply over less than 10 kyr at the end of a glacial period. There does not yet exist wide agreement about the causes of this cycle or about the origin of its shape. Here we explore the possibility that an ecologically driven oscillator plays a role in the dynamics. A conceptual model describing the interaction between calcifying plankton and ocean alkalinity shows interesting features: (i) It generates an oscillation in atmospheric CO 2 with the characteristic asymmetric shape observed in the ice core record, (ii) the system can transform a sinusoidal Milankovitch forcing into a sawtooth-shaped output, and (iii) there are spikes of enhanced calcifier productivity at the glacial-interglacial transitions, consistent with several sedimentary records. This suggests that ecological processes might play an active role in the observed glacial-interglacial cycles. ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77598
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, MA 02139, United States; Biometris, Wageningen University and Research, Wageningen, Netherlands; Department of Earth Sciences, University of Oxford, Oxford, United Kingdom
Recommended Citation:
Omta A,W,, Van Voorn G,et al. On the potential role of marine calcifiers in glacial-interglacial dynamics[J]. Global Biogeochemical Cycles,2013-01-01,27(3)