While climate engineering may not be justified (anyone have a copy of Sillmann et al.?), neither is inaction. Here's yet further evidence that we have a climate and planetary emergency:
http://www.sciencemag.org/content/early/2015/03/25/science.aaa0940 "Overall, average ice-shelf volume change accelerated from negligible loss at 25 ± 64 km3 per year for 1994-2003 to rapid loss of 310 ± 74 km3 per year for 2003-2012. West Antarctic losses increased by 70% in the last decade, and earlier volume gain by East Antarctic ice shelves ceased. In the Amundsen and Bellingshausen regions, some ice shelves have lost up to 18% of their thickness in less than two decades." Greg -------------------------------------------- On Wed, 3/25/15, Greg Rau <[email protected]> wrote: Subject: Re: [geo] Climate emergencies do not justify engineering the climate : Nature Climate Change : Nature Publishing Group To: "[email protected]" <[email protected]>, "geoengineering" <[email protected]> Date: Wednesday, March 25, 2015, 10:18 AM All righty then, adaptation it is, and soon: http://www.climatecentral.org/news/climate-change-jamming-critical-heat-conveyor-18810 "...an avalanche of cold water from the melting Greenland ice sheet appears to be slowing the ocean circulation to levels not experienced in more than 1,000 years. That’s the conclusion of a bold new attempt to combine temperature measurements and climate-related data scrounged from coral samples, ice cores and tree rings to track the worrying decline of the critical Atlantic Ocean phenomenon. The new research, published Monday in Nature Climate Change, used observations and studies of sea-surface temperatures to produce a new index — one that charts the waning force of the Atlantic meridional overturning circulation (AMOC), one of the planet’s most important circulation systems...." Good luck with that.Greg From: Andrew Lockley <[email protected]> To: geoengineering <[email protected]> Sent: Wednesday, March 25, 2015 9:07 AM Subject: [geo] Climate emergencies do not justify engineering the climate : Nature Climate Change : Nature Publishing Group http://www.nature.com/nclimate/journal/v5/n4/full/nclimate2539.html NATURE CLIMATE CHANGE | COMMENTARY Climate emergencies do not justify engineering the climate Jana Sillmann, Timothy M. Lenton, Anders Levermann, Konrad Ott, Mike Hulme, François Benduhn & Joshua B. Horton Nature Climate Change 5, 290–292 (2015) doi:10.1038/nclimate2539 Published online 25 March 2015 Current climate engineering proposals do not come close to addressing the complex and contested nature of conceivable 'climate emergencies' resulting from unabated greenhouse-gas emissions. References References• Author information Crutzen, P. Climatic Change 77, 2–220 (2006). CASArticle Geoengineering the Climate: Science, Governance, and Uncertainty (The Royal Society, 2009). Lenton, T. M. et al. Proc. Natl Acad. Sci. USA 105, 1786–1793 (2008). PubMedArticle Lenton, T. M. Nature Clim. Change 1, 201–209 (2011). ISIArticle Boettinger, C. & Hastings, A. Nature 493, 157–158 (2013). CASISIPubMedArticle Scheffer, M. et al. Nature 461, 53–59 (2009). CASISIPubMedArticle Mengel, M. & Levermann, A. Nature Clim. Change 4, 451–455 (2014). ISIArticle Robinson, A., Calov, R. & Ganopolski, A. Nature Clim. Change 2, 429–432 (2012). ISIArticle Jones, C. et al. Nature Geosci. 2, 484–487 (2009). CASISIArticle Boulton, C. A., Good, P. & Lenton, T. M. Theor. Ecol. 6, 373–384 (2013). Article Favier, L. et al. Nature Clim. Change 4, 117–121 (2014). ISIArticle Robock, A., Oman, L. & Stenchikov, G. L. J. Geophys. Res. 113, D16101 (2008). CASArticle Blackstock, J. J. et al. Climate Engineering Responses to Climate Emergencies (Novim, 2009); http://arxiv.org/pdf/0907.5140 Levermann, A. Nature 506, 27–29 (2014). CASISIPubMedArticle Coumou, D. & Rahmsdorf, S. Nature Clim. Change 2, 491–496 (2012). ISI Sillmann, J., Kharin, V. V., Zwiers, F. W., Zhang, X. & Bronaugh, D. J. Geophys. Res. Atmos. 118, 2473–2493 (2013). Article Curry, C. L. et al. J. Geophys. Res. Atmos. 119, 3900–3923 (2014). Article Otto, F. E. L., Massey, N., van Oldenborgh, G. J., Jones, R. G. & Allen, M. R. Geophys. Res. Lett. 39, L04702 (2012). Article Explaining Extreme Events of 2012 from a Climate Perspective (eds Peterson, T. C., Hoerling, M. P., Stott, P. A. & Herring, S.) Bull. Am. Meteorol. Soc. 94, S1–S74 (2013). Article Hulme, M. Progr. Phys. Geogr. 38, 499–511 (2014). Article Hulme, M. Can Science Fix Climate Change? A Case Against Climate Engineering (Polity, 2014). Ricke, K. L., Granger Morgan, M. & Allen, M. R. Nature Geosci. 3, 537–541 (2010). CASISIArticle Bentley, R. A. et al. Frontiers Environ. Sci. 2, 35 (2014). Article Calhoun, C. Can. Rev. Sociol. 41, 373–395 (2008). Article Markusson, N., Ginn, F., Ghaleigh, N. S. & Scott, V. WIREs Clim. Change 5, 281–290 (2013). Article Download references Author information References• Author information Affiliations Center for International Climate and Environmental Research — Oslo, Pb. 1129 Blindern, 0318 Oslo, Norway Jana Sillmann Earth System Science, College of Life and Environmental Sciences, University of Exeter, Laver Building (Level 7), North Parks Road, Exeter EX4 4QE, UK Timothy M. Lenton Potsdam Institute for Climate Impact Research, Telegraphenberg A3, 14473 Potsdam, Germany Anders Levermann Institute for Physics and Astronomy, Potsdam University, Campus Golm, Haus 28, Karl-Liebknecht-Strasse 24/25, 14476 Potsdam-Golm, Germany Anders Levermann Faculty of Arts and Humanities, Kiel University, Leibnizstrasse 6, 24118 Kiel, Germany Konrad Ott Department of Geography, King's College London, Strand, London WC2R 2LS, UK Mike Hulme Institute for Advanced Sustainability Studies, Berliner Strasse 130, 14467 Potsdam, Germany François Benduhn Harvard Kennedy School, 79 John F. Kennedy Street, Box 117, Cambridge, Massachusetts 02138, USA Joshua B. Horton Contributions J.S. initiated and structured this Commentary. All authors contributed to the content and writing. Corresponding author Correspondence to: Jana Sillmann -- You received this message because you are subscribed to the Google Groups "geoengineering" group. 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