http://onlinelibrary.wiley.com/doi/10.1002/2013GL057467/abstract
Reversing climate warming by artificial atmospheric carbon-dioxide removal: can a Holocene-like climate be restored? Andrew. H. MacDougall DOI: 10.1002/2013GL057467 Geophysical Research Letters Keywords: Holocene;Climate warming;Reversibility Abstract Most climate modelling studies of future climate have focused on the affects of carbon emissions in the present century or the long-term fate of anthropogenically emitted carbon. However, after carbon emissions cease there may be a desire to return to a “safe" CO2 concentration within this millennium. Realistically this implies artificially removing CO 2 from the atmosphere. In this study experiments are conducted using the University of Victoria Earth system climate model forced with novelfuture scenarios to explore the reversibility of climate warming as a response to a gradual return to pre-industrial radiative forcing. Due to hysteresis in the permafrost carbon pool the quantity of carbon that must be removed from the atmosphere is larger than the quantity that was originally emitted (115–180% of original emissions). In all the reversibility simulations with a moderate climate sensitivity a climate resembling that of the Holocene can be restored by 3000 CE. -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/geoengineering. For more options, visit https://groups.google.com/groups/opt_out.
