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folke_kelm
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A fact that is not much known in the western world is, that the Russians had temporary weather observation stations on the moving polar ice. They started these activities in the mid 1920´s and abandoned the program as late as in the 1980´s. There is a huge amount of data to get from there. The Russian Polar Research had up to 5 stations simultaneously and there has been seldom a period without observation of the polar weather and ice conditions. These stations were located on islands of up to 20 m thick ice floating around. Not any station lasted longer than 10 years until they had to be abandoned due to melting or being flushed out of the arctic. in the 1980ies i got increasingly difficult to find ice with sufficient thickness to support a manned station for longer than 1 year, so the whole program was abandoned.
Toggle Commented Apr 7, 2014 on Research for a novel at Arctic Sea Ice
S.H. "Both, combined, would suggest their is some fairly fragile ice that could melt out rapidly. The ice just hasn't had enough time to strengthen." As we say in Sweden, it is un-ice (ois) you should not walk on it
Toggle Commented Mar 25, 2014 on PIOMAS March 2014 at Arctic Sea Ice
Regarding to my questions sme days ago i will thank you for your answers. AlRodger, Dahl-Jensen is really good, i have not reaaly been aware of it before. Nevertheless, the link from MattOClimateW is exactly what i was looking for. You must not warm the ice sheet to melt it, the point is, that you can tranfer heat to the inner ice sheet due to refreezing liquid water in the depth of the ice sheet, and this is much energy. the warmer the ice is, the less restistent it is to mechanical stress, and this is the point of concern for GIS and WAIS. It is not surface melting, ablation which is responsible for the majority of mass loss, it is glacier discharge and that will grow with warmer core temperatures and resulting much less viscosity of the ice.
Toggle Commented Mar 24, 2014 on PIOMAS March 2014 at Arctic Sea Ice
As a frequent reader of this blog i would like to drop some thoughts about melting here. A crucial question about Greenland ice sheet melting is how to transfer heat to the inner ice sheet. Melting of surface and melting of the bottom of the outlet glaciers is one point to discuss. the mechanical properties of the inner ice sheet are another. Mechanical stress resistance of ice is strongly dependent of temperature. the warmer the ice is, the less resistant it is. To determine the future resistance of the ice sheet against mechanical disintegration it is important to have measures of the inner temperature of the central ice sheet. Ice is a very bad heat conductor, so it will take a time to warm up the core of the ice. I do not know of a paper which deals with this question, may be one of you knows about something. The whole picture of Greenland and arctic summer melt is, that still most energy transported to the arctic is used to melt sea ice. If you compare it, roughly 18000 Km3 sea ice is melting against only 450 Km3 of Greenland ice sheet. You see, that only a minor portion of heat is able to provide surface melt or bottom melt at the outlet glaciers. However, this will change fundamentally when we get no sea ice left. This will result in a strong warming of surface water and strong increase in surface and bottom melting. Still the question remains how much of the energy is going into the inner ice sheet, altering the mechanical stability of the whole ice sheet So, does one know about papers about ice sheet inner temperature and temperature change over time, papers about temperature dependence of ice rheology and implication of this into models of ice sheet behavior? greetings from a very warm Sweden Folke
Toggle Commented Mar 20, 2014 on PIOMAS March 2014 at Arctic Sea Ice
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Oct 3, 2012