Dear All,
Please find enclosed a brief satellite animation on the Robeson Channel from this summer which suggest that use of bridge-style suspension cabling could hold ice in place and prevent it moving into the warm waters further along the channel between Ellesmere Island and Greenland. The link attached below which shows the summertime ice movements. The shortest suspension cables would be Ellesmere - Hans Island - Greenland each stretch about 10 kilometres in length. (The concept is to create ice congestion behind barrier that is self-locking jam of pack ice behind cable that remains longer in the cold waters.) On the negative side, the ice amount south of any successful cable barriers will decrease. The impact of cables for boats, whales and perhaps other large fish and wild life would also have to be addressed. After melting, the barrier cable is lowered to the seafloor when ice is on northward move or there is a lack of ice, the barrier is raised up to surface whenever there is ice flow moving southward. It is also raised up to surface for the winter freeze. In Nunavut, the suspension cabling could help to keep the North West Passage clear of thick sea ice floes that damage ships while preserving ice on the north side of the channel. This might help justify such a system at least in Nunavut. The profile of the Swalbard Islands and Franz Joseph Land could also be enlarged by blocking the straights by cables. This would increase the ice congestion behind these archipelagoes and decrease some sea ice escape from the high Arctic Basin. I have not considered blocking of the Fram Staight due to its width, but materially the largest amount of sea ice loss through escape will occur there. The barriers can slow down ice movement and loss to the south due to decreases in ice movements but if ice melts away due to warm weather behind barrier, these measures become all but useless. Kind regards, Albert From: janne.bjorkl...@sll.fi To: albert_kal...@hotmail.com Subject: Greenpeace dokumentoi pohjoisen pallonpuoliskon jäätiköiden sulamista Date: Thu, 1 Oct 2009 14:18:14 +0300 http://www.greenpeace.org/finland/fi/mediakeskus/lehdistotiedotteet/greenpeace-dokumentoi-pohjoise _________________________________________________________________ MSN straight to your mobile - news, entertainment, videos and more. http://clk.atdmt.com/UKM/go/147991039/direct/01/ --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "geoengineering" group. To post to this group, send email to geoengineering@googlegroups.com To unsubscribe from this group, send email to geoengineering+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/geoengineering?hl=en -~----------~----~----~----~------~----~------~--~---
