Hi All Is it too late for the authors to make is clear which kind of solar geo-engineering they are writing about?
Stephen Emeritus Professor of Engineering Design, School of Engineering, Mayfield Road, University of Edinburgh EH9 3DW, Scotland On 14-Jan-19 4:52 PM, Andrew Lockley wrote: http://iopscience.iop.org/article/10.1088/1748-9326/aafc7d Environmental Research Letters ACCEPTED MANUSCRIPT • THE FOLLOWING ARTICLE IS OPEN ACCESS Effects of global warming and solar geoengineering on precipitation seasonality Prasanta Kumar Bal1, Raju Pathak2, Saroj Kanta Mishra3 and Sandeep Sahany4 Accepted Manuscript online 8 January 2019 • © 2018 The Author(s). Published by IOP Publishing Ltd What is an Accepted Manuscript? Download Accepted Manuscript PDF 34 Total downloads Article has an altmetric score of 1 Abstract Effects of global warming and geoengineering on annual precipitation and its seasonality over different parts of the world are examined using the piControl, 4xCO2 and G1 simulations from eight global climate models participating in the Geoengineering Model Intercomparison Project. Specifically, we have used relative entropy, seasonality index, duration of peak rainy season, and timing of peak rainy season to investigate changes in precipitation characteristics under 4xCO2 and G1 scenarios with reference to the piControl. In a 4xCO2 world, precipitation is projected to increase over many parts of the globe, along with increase in both relative entropy and seasonality index. Further, in a 4xCO2 world the increase in peak precipitation duration is found to be highest over the sub Polar climatic region. However, over the tropical rain belt, the duration of peak precipitation period is projected to decrease. There is a significant shift in the timing of peak precipitation period by 15 days to 2 months (forward) over many parts of the northern hemisphere except over few regions, such as, north America and parts of Mediterranean countries, where a shift in precipitation peak by 1 to 3 months (backward) is observed. However, solar geoengineering is found to significantly compensate many of the changes projected in a 4xCO2. Solar geoengineering nullifies the precipitation increase to a large extent. Relative entropy and seasonality index are almost restored back to that in the control simulations, although with small positive and negative deviations over different parts of the globe, thus, significantly nullifying the impact of 4xCO2. However, over some regions such as northern parts of South America, Arabian Sea, and Southern Africa, geoengineering does not significantly nullify changes in seasonality index seen in 4xCO2. Finally, solar geoengineering significantly compensates the changes in timing of the peak and duration of the peak precipitation seen in 4xCO2. -- 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 geoengineering+unsubscr...@googlegroups.com<mailto:geoengineering+unsubscr...@googlegroups.com>. To post to this group, send email to geoengineering@googlegroups.com<mailto:geoengineering@googlegroups.com>. Visit this group at https://groups.google.com/group/geoengineering. For more options, visit https://groups.google.com/d/optout. -- The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336. -- 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 geoengineering+unsubscr...@googlegroups.com. To post to this group, send email to geoengineering@googlegroups.com. Visit this group at https://groups.google.com/group/geoengineering. For more options, visit https://groups.google.com/d/optout.
