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Causes and Timing of Future Biosphere Extinction : Volume 2, Issue 6 (07/11/2005)

By Franck, S.

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Book Id: WPLBN0003978763
Format Type: PDF Article :
File Size: Pages 15
Reproduction Date: 2015

Title: Causes and Timing of Future Biosphere Extinction : Volume 2, Issue 6 (07/11/2005)  
Author: Franck, S.
Volume: Vol. 2, Issue 6
Language: English
Subject: Science, Biogeosciences, Discussions
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Bloh, W. V., Bounama, C., & Franck, S. (2005). Causes and Timing of Future Biosphere Extinction : Volume 2, Issue 6 (07/11/2005). Retrieved from

Description: Potsdam Institute for Climate Impact Research, Potsdam, Germany. We present a minimal model for the global carbon cycle of the Earth containing the reservoirs mantle, ocean floor, continental crust, biosphere, and the kerogen, as well as the aggregated reservoir ocean and atmosphere. The model is specified by introducing three different types of biosphere: procaryotes, eucaryotes, and complex multicellular life. We find that from the Archaean to the future a procaryotic biosphere always exists. 2 Gyr ago eucaryotic life first appears. The emergence of complex multicellular life is connected with an explosive increase in biomass and a strong decrease in Cambrian global surface temperature at about 0.54 Gyr ago. In the long-term future the three types of biosphere will die out in reverse sequence of their appearance. We show that there is no evidence for an implosion-like extinction in contrast to the Cambrian explosion. The ultimate life span of the biosphere is defined by the extinction of procaryotes in about 1.6 Gyr.

Causes and timing of future biosphere extinction


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