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Title: Mid-Pleistocene transition in glacial cycles explained by declining CO2 and regolith removal
Authors: Willeit, M.Ganopolski, A.Calov, R.Brovkin, V.
Publishers version: https://doi.org/10.1126/sciadv.aav7337
URI: https://oa.tib.eu/renate/handle/123456789/10378
http://dx.doi.org/10.34657/9414
Issue Date: 2019
Published in: Science Advances 5 (2019), Nr. 5
Journal: Science Advances
Volume: 5
Issue: 4
Page Start: eaav7337
Publisher: Washington, DC [u.a.] : Assoc.
Abstract: Variations in Earth's orbit pace the glacial-interglacial cycles of the Quaternary, but the mechanisms that transform regional and seasonal variations in solar insolation into glacial-interglacial cycles are still elusive. Here, we present transient simulations of coevolution of climate, ice sheets, and carbon cycle over the past 3 million years. We show that a gradual lowering of atmospheric CO2 and regolith removal are essential to reproduce the evolution of climate variability over the Quaternary. The long-term CO2 decrease leads to the initiation of Northern Hemisphere glaciation and an increase in the amplitude of glacial-interglacial variations, while the combined effect of CO2 decline and regolith removal controls the timing of the transition from a 41,000- to 100,000-year world. Our results suggest that the current CO2 concentration is unprecedented over the past 3 million years and that global temperature never exceeded the preindustrial value by more than 2°C during the Quaternary.
Keywords: Carbon dioxide; Orbits; Salinity measurement; Climate variability; CO2 concentration; Glacial-interglacial cycles; Global temperatures; Northern hemisphere glaciations; Seasonal variation; Solar insolation; Transient simulation; Glacial geology
Type: article; Text
Publishing status: publishedVersion
DDC: 500
License: CC BY 4.0 Unported
Link to license: https://creativecommons.org/licenses/by/4.0/
Appears in Collections:Geowissenschaften

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Willeit, M., A. Ganopolski, R. Calov and V. Brovkin, 2019. Mid-Pleistocene transition in glacial cycles explained by declining CO2 and regolith removal. 2019. Washington, DC [u.a.] : Assoc.
Willeit, M., Ganopolski, A., Calov, R. and Brovkin, V. (2019) “Mid-Pleistocene transition in glacial cycles explained by declining CO2 and regolith removal.” Washington, DC [u.a.] : Assoc. doi: https://doi.org/10.1126/sciadv.aav7337.
Willeit M, Ganopolski A, Calov R, Brovkin V. Mid-Pleistocene transition in glacial cycles explained by declining CO2 and regolith removal. Vol. 5. Washington, DC [u.a.] : Assoc.; 2019.
Willeit, M., Ganopolski, A., Calov, R., & Brovkin, V. (2019). Mid-Pleistocene transition in glacial cycles explained by declining CO2 and regolith removal (Version publishedVersion, Vol. 5). Version publishedVersion, Vol. 5. Washington, DC [u.a.] : Assoc. https://doi.org/https://doi.org/10.1126/sciadv.aav7337
Willeit M, Ganopolski A, Calov R, Brovkin V. Mid-Pleistocene transition in glacial cycles explained by declining CO2 and regolith removal. 2019;5(4). doi:https://doi.org/10.1126/sciadv.aav7337


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