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CO2 and northern hemisphere ice volume variations over the middle and Late quaternary
Li, X.S.; Berger, A.; Loutre, M.F. (1998). CO2 and northern hemisphere ice volume variations over the middle and Late quaternary. Clim. dyn. 14(7-8): 537-544
In: Climate Dynamics. Springer: Berlin; Heidelberg. ISSN 0930-7575, more
Peer reviewed article  

Available in Authors 

Keyword
    Marine

Authors  Top 
  • Li, X.S.
  • Berger, A., more
  • Loutre, M.F.

Abstract
    The atmospheric CO2 concentrations have been reconstructed over the past 600 ka based on regression between the Vostok CO2 data and the SPEC-MAP oxygen isotope values. A lag of 4.5 ka (CO2 preceding delta(18)O) gives the best results. A polynomial of order 5 explains 66% of the Vostok CO2 variance over the last 220 ka. The Northern Hemisphere ice-sheet volume was simulated over the past 575 ka using the LLN 2-D model, forced by insolation and these statistically reconstructed atmospheric CO2 concentrations. The simulated ice volume fluctuations resemble the deep-sea oxygen isotope variations. CO2 of interglacial level is necessary for explaining both the interglacial at oxygen isotopic stage 11 and our present-day interglacial.

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