I just re-discovered four stunning science videos from the last expedition to reach Petermann Gletscher in Greenland. Each video is 3-6 minutes long and was made professionally by Saskia Madlener of 77th Parallel Productions with partial support from the US National Science Foundation. They were first posted at
and relate to a joint 2015 US-Swedish Expedition. The project involved diverse groups of geological, physical, biological, and chemical scientists from Sweden, England, Scotland, Denmark, Germany, Canada, and the USA who all worked together aboard the Swedish icebreaker Oden for 6 weeks. [For full resolution HD video click on the Vimeo icon in the video.]
Petermann Glacier 2015 – Overview from 77th Parallel on Vimeo.
Petermann Glacier 2015 – Ocean & Ice from 77th Parallel on Vimeo.
Petermann Glacier 2015 – Rocks & Shells from 77th Parallel on Vimeo.
Petermann Glacier 2015 – Expedition from 77th Parallel on Vimeo.
The National Snow and Ice Data Center announced today, that the Arctic Ice Area Extent has reached an absolute minimum breaking the record minimum of 2007 with still several weeks of potential melting and retreat to go. This has been anticipated for many weeks now with perhaps the most extensive coverage and intelligent discussions over at Neven’s Arctic Sea Ice Blog.
The graph above shows Arctic sea ice extent as of August 26, 2012, along with daily ice extent data for 2007, the previous record low year, and 1980, the record high year. 2012 is shown in blue, 2007 in green, and 1980 in orange. The 1979 to 2000 average is in dark gray. The gray area around this average line shows the two standard deviation range of the data. The 1981 to 2010 average is in sky blue. Sea Ice Index data. [Credit: National Snow and Ice Data Center]
This is as big a deal, because an ice-covered ocean reflects much more sunlight back into space in summer than a black ocean does that absorbs more heat: a positive feedback. This is why people in hot climates wear white, not black clothes, they like to stay cool. Furthermore, this decline has been ongoing for the last 30 years and the climate models that policy makers rely on did not predict this level of ice cover to occur for another 20-30 years. So, the warming climate and the changes it caused are on an accelerated schedule with regard to the Arctic Sea Ice cover. Also, the remaining ice cover is thinner than it used to be, because the multi-year ice keeps leaving the Arctic faster than it can be formed inside the Arctic. Both the Fram Strait to the east of Greenland and Nares Strait to the west of Greenland export this old, hard, and thick ice that ultimately melts further south. The ice that is left in the Arctic Ocean has become both thinner, younger, and softer, making it easier to melt the next summer.
On somewhat related news from the University of Delaware (UDel), we put two videos together that show a tiny, if spectacular example of a different area that has never been ice-free for at least 150 years when people were looking: Petermann Fjord. On August 10/11, 2012 the Captain and crew of the Canadian Coast Ship Henry Larsen gave us unfettered 18 hours access to the newly ice-free waters of this large glacier that discharges about 6% of the Greenland ice sheet. The UDel press release has the video that is also posted at youtube. As a less professionally assembled version is my first introductory iMovie project, e.g.,
Posted in Global Warming, Ice Cover, Ice Island, Nares Strait 2012, Petermann Glacier
Tagged Arctic Ocean, climate, glaciers, Greenland, ice island, Petermann, video