Mike you are right about the bubbles. As you certainly know hair turns white because of bubbles appear in the hair as one ages. It still retains its original pigmentation and but for the bubbles would retain its coloration. Polar bear hair is not white but has bubbles so appears white. White coloration has value to arctic animals for protection but it keeps them cooler for reasons not so clearly beneficial to them.
Bubbles would provide empty space so heat conduction would be reduced. Interesting technical challenge! -gene ----- Original Message ----- From: "Mike MacCracken" <mmacc...@comcast.net> To: pcfl...@ualberta.ca, voglerl...@gmail.com, "Geoengineering" <Geoengineering@googlegroups.com> Cc: "Emily L-B" <em...@lewis-brown.net> Sent: Thursday, June 20, 2013 8:26:42 AM Subject: Re: [geo] Re: Experiment Currently Taking Place in the Arctic? Re: [geo] Re: Experiment Currently Taking Place in the Arctic? While sawdust worked as an insulator in block houses, those conditions were in the dark. In the real world, ice made from that would presumably be less reflective and so absorb more solar during the sunlit hours. Would it not make more sense to figure out how to make a lot of tiny bubbles to be taken up in the ice. Might not the bubbles have both an insulating and reflective effect? Mike MacCracken On 6/19/13 10:10 PM, "Peter Flynn" < peter.fl...@ualberta.ca > wrote: I’m not sure of the intended location of Project Habakkuk, but year round ice in the north is just thick ice. A conventional boundary for annual vs. year round ice is 3-4 m thickness: https://en.wikipedia.org/wiki/Polar_ice_packs I think a first experiment would be to see if one could make an incremental 3 m thick ice in one winter by pumping sea water on top in the winter. If so, it would obviate the need for sawdust. I have no doubt that sawdust would retard melting: it was the standard insulation for block ice in ice houses when ice was cut from rivers in the winter for year round usage. However, if thickening sea ice focuses on additives it will add a layer of environmental complexity (adding sawdust to the Arctic ice cap) that can be avoided if a sufficient thickness can be achieved with the additive. Peter Flynn Peter Flynn, P. Eng., Ph. D. Emeritus Professor and Poole Chair in Management for Engineers Department of Mechanical Engineering University of Alberta peter.fl...@ualberta.ca < mailto:peter.fl...@ualberta.ca > cell: 928 451 4455 From: geoengineering@googlegroups.com [ mailto:geoengineering@googlegroups.com ] On Behalf Of Michael Hayes Sent: June-19-13 5:10 PM To: geoengineering@googlegroups.com Subject: [geo] Re: Experiment Currently Taking Place in the Arctic? To Emily on ice additives, During the early years of WW2, there was a proposed for a mid atlantic iceberg as an airfield. They had a small one built in Canada. They used sawdust and did achieve year-round ice. Project Habakkuk " was a plan by the British < http://en.wikipedia.org/wiki/Great_Britain > in World War II < http://en.wikipedia.org/wiki/World_War_II > to construct an aircraft carrier < http://en.wikipedia.org/wiki/Aircraft_carrier > out of pykrete < http://en.wikipedia.org/wiki/Pykrete > (a mixture of wood pulp < http://en.wikipedia.org/wiki/Wood_pulp > and ice < http://en.wikipedia.org/wiki/Ice > ), for use against German U-boats < http://en.wikipedia.org/wiki/U-boat > in the mid-Atlantic < http://en.wikipedia.org/wiki/Atlantic_Ocean > , which were beyond the flight range of land-based planes at that time.". I believe they did achieve year-round ice. The war ended as they were gearing up for a sea trial. Best, On Sunday, June 16, 2013 3:39:14 PM UTC-7, Josh Horton wrote: Hi everyone, Near the end of a recent, otherwise unremarkable story about geoengineering at RTCC (link below), Piers Forster from Leeds University is quoted as follows: “There is one experiment we’re currently undertaking – we’re trying to look at rescuing Arctic Ice by stimulating aeroplanes flying from Spitzbergen in Norway – and dump out a lot of Sulphur Dioxide, and we’re trying to look at that as a very short term protection against the loss of Arctic Ice." ( http://www.rtcc.org/scientists-warn-earth-cooling-proposals-are-no-climate-silver-bullet/ ) Does anyone know what he is talking about? Josh Horton joshuah...@gmail.com <javascript:> -- 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 http://groups.google.com/group/geoengineering . For more options, visit https://groups.google.com/groups/opt_out . -- 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 http://groups.google.com/group/geoengineering. For more options, visit https://groups.google.com/groups/opt_out.
