What is not correct in the media report is this sentence: “This process, however, would take decades.” Well, I guess arguably that’s true, it’s just it would take a LOT of decades. Melt rate is currently of order 1-2mm/yr equivalent SLR, so to get the 6m from melting all of Greenland would take a few thousand years. Obviously it can speed up a lot, but “hey, it’s losing mass” does not remotely imply “therefore we only have a few decades before we lose our coastal cities”. So no, you can’t use this study to claim that geoengineering is required to keep our coastal cities. The problem with relying on mitigation+CDR is time-scale, but this study doesn’t prove that our response time-scale needs to be faster than what CDR can (at least hypothetically) provide. d From: geoengineering@googlegroups.com <geoengineering@googlegroups.com> On Behalf Of Andrew Lockley Sent: Saturday, August 15, 2020 3:40 AM To: geoengineering <geoengineering@googlegroups.com> Subject: [geo] Background-Greenland collapse
If this study is correct https://www.nature.com/articles/s43247-020-0001-2 And is correctly reported here https://mobile.reuters.com/article/amp/idUSKCN25A2X3 Then it appears to back up a point that I have been making for a long time: geoengineering is required, if we are to keep our coastal cities. I do not see economic or political feasibility for large scale CDR to tackle historic emissions, and thus the task must fall to SRM. Nobody has managed to rause an objection to this argument to date. I'd be grateful if those who might disagree were to raise counter arguments now. If the situation is as I understand it, prevarication has no clear benefits, and we should thus move quickly to readiness for deployment. Andrew -- 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 view this discussion on the web visit https://groups.google.com/d/msgid/geoengineering/CAJ3C-07%2BJc0dmp26W2_H08Rsrs1V_sjEs1pkG6xuZZ75OcTa%2Bw%40mail.gmail.com<https://groups.google.com/d/msgid/geoengineering/CAJ3C-07%2BJc0dmp26W2_H08Rsrs1V_sjEs1pkG6xuZZ75OcTa%2Bw%40mail.gmail.com?utm_medium=email&utm_source=footer>. -- 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 view this discussion on the web visit https://groups.google.com/d/msgid/geoengineering/CH2PR04MB6936220B9B7203A2CB55EA4B8F410%40CH2PR04MB6936.namprd04.prod.outlook.com.
