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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
This item is licensed under a Creative Commons License