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Bouke Van der Spoel
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Does anyone know if there are any foot expeditions to the pole going on/planned this year? With all those cracks, I guess it has become very risky. I wonder if the last expedition has already happened...
Toggle Commented Mar 16, 2013 on Crack is bad for you (and sea ice) at Arctic Sea Ice
Kevin, i meant the graphic, "Graphic depiction of the amount of sunlight above and underneath the Arctic sea ice" http://www.awi.de/fileadmin/user_upload/News/Press_Releases/2013/1._Quartal/Meereis_PM_Nicolaus/PM-Fotos/st03_Licht-Schema-Nicolaus_ponds3_w.jpg Crandles, the only way to make it work then is if in 1980 summer temps were significantly below freezing, which would result in a lower heat loss relative to 2010. A quick look at http://iabp.apl.washington.edu/Summary/ discards that option: already in 1979, june-juli-aug arctic surface air temperatures were around freezing.
Toggle Commented Jan 19, 2013 on 2013 Open thread #1 at Arctic Sea Ice
If you take a look at the last press release at http://www.awi.de/en/news/press_releases/ ("Melt ponds cause the Artic sea ice to melt more rapidly") it contains a graph implying that there's a 18% increase in solar energy absorption between 1980 and 2010, due to albedo changes of first year ice and melt ponds. Given a 500W/m2 insolation (http://www.physicalgeography.net/fundamentals/6i.html) on the north pole during summer solstice, an 18% increase in absorption would lead to a 1mm/hour increase in melt while the sun is shining. Let's say it's cloudless for 10 hours per day, so we have an extra 1cm of melt per day. If this continues for 2 months, that's an extra 0.6 meters of melt. Somehow I find that hard to believe. Is my calculation wrong or are there any subtle things I missed?
Toggle Commented Jan 19, 2013 on 2013 Open thread #1 at Arctic Sea Ice
The caption for the first graph doesn't correspond to the graph: 2012 is red according to the graph and dark blue according to the caption.
Toggle Commented Dec 10, 2012 on 2012 Greenland records at Arctic Sea Ice
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Dec 10, 2012