Glacial cycles and carbon dioxide: A conceptual model

The correlation between Antarctic temperature and atmospheric carbon dioxide concentration is a key feature of Quaternary climate cycles. The cycle is characterised by pronounced temporal asymmetry; with rapid increase in both temperature and CO2 at the glacial termination. Here I compare observed c...

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Bibliographic Details
Published in:Geophysical Research Letters
Main Author: Hogg, Andrew
Format: Article in Journal/Newspaper
Language:unknown
Published: American Geophysical Union
Subjects:
Keywords: Atmospheric temperature
Carbon dioxide
Climate change
Glaciers
Thermal effects
Climate cycles
Conceptual model
Glacial cycles
Glacial geology
climate cycle
glacial-interglacial cycle
paleoclimate
parameterization
Quaternary
t
Antarctic
Antarc*
Online Access:http://hdl.handle.net/1885/23871
https://doi.org/10.1029/2007GL032071
https://openresearch-repository.anu.edu.au/bitstream/1885/23871/5/Hogg_-_Glacial_cycles.pdf.jpg
https://openresearch-repository.anu.edu.au/bitstream/1885/23871/7/01_Hogg_Glacial_cycles_and_carbon_2008.pdf.jpg
Description
Summary:The correlation between Antarctic temperature and atmospheric carbon dioxide concentration is a key feature of Quaternary climate cycles. The cycle is characterised by pronounced temporal asymmetry; with rapid increase in both temperature and CO2 at the glacial termination. Here I compare observed climate cycles with results from a simple model which predicts the evolution of global temperature and carbon dioxide over the glacial-interglacial cycle. The model includes a term which parameterises deep ocean release of CO2 in response to warming, and thereby amplifies the glacial cycle. In this model, temperature rises lead CO2 increases at the glacial termination, but it is the feedback between these two quantities that drives the abrupt warming during the transition from glacial to interglacial period.

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