Talk:Grand Canyon (Greenland)

Article issues

 * Name: Surely, this is not the official name of the canyon. I would expect the page moved as soon as it gets one. If someone opposes Americanization, a descriptive page title may be used: Mega-canyon in Greenland or Greenland mega-canyon, also seen in the sources. Opinions?  Staszek Lem (talk) 19:26, 30 August 2013 (UTC)


 * Category:Canyons and gorges of North America. Last time I checked, Greenland is categorizes as category:Bicontinental countries. Shall we add Category:Canyons and gorges of Europe as well? Staszek Lem (talk) 19:26, 30 August 2013 (UTC)


 * No objections personally to the title. The Grand Canyon is probably the most recognisable of canyons, so Greenland's Grand Canyon is likely to be a plausible search term. Also probably worth adding the Europe category as Greenland is between Europe and North America, and is an autonomous country within the Kingdom of Denmark. Paul MacDermott (talk) 19:34, 30 August 2013 (UTC)
 * Agree "Greenland's Grand Canyon" sounds like an obvious search route and popular name. In time it will surely receive a more official name, perhaps both in Inuit and in Danish.83.254.151.33 (talk) 19:51, 30 August 2013 (UTC)
 * OK; I created redirects from "mega-canyon" suggestions as well, since they are also searchable.Staszek Lem (talk) 19:57, 30 August 2013 (UTC)


 * Grand Canyon of Greenland would be consistent with other WP articles on such canyons in different parts of the world, so it should be used as a search name also. _ _ _ _ 83d40m (talk) 21:55, 1 September 2013 (UTC)

World's longest?
I am not arguing, not being any sort of geographer, but I am wondering about the criteria for canyons. Does the Great Rift Valley count? Surely it is longer? What are the criteria for this sort of thing? Shouldn't the article (or some "canyon" article) cover such considerations? JonRichfield (talk) 07:20, 2 September 2013 (UTC)
 * I am not arguing either, not being any sort of geographer, but what is the big surprise? We knew under the ice existed some sort of terrain.  We identified the terrain structure.  Is a canyon some huge surprise?  Marc S. dania Fl 206.192.35.125 (talk) 19:54, 3 September 2013 (UTC)


 * Marianas Trench? Rwflammang (talk) 19:04, 2 September 2013 (UTC)

Animation
The included animation won't play for me - is there some glitch? Geopersona (talk) 19:37, 2 September 2013 (UTC)
 * Switched from IE8 to Chrome and then it worked. Geopersona (talk) 18:13, 4 September 2013 (UTC)

The topgraphy map
It should be indicated in the caption that the canyon is *not* present on the elevation map, since the map was made many years before the discovery of the canyon. — Preceding unsigned comment added by 83.254.154.164 (talk) 09:47, 14 February 2015 (UTC)

delineate exactly where this "canyon" is
Please add graphics that clearly delineate exactly where this "canyon" is. Please add text and graphics that emphasize how much of it is how far below sea level, and what the possibilities are of this connecting to the surrounding ocean with liquid water.-71.174.179.158 (talk) 22:02, 4 January 2017 (UTC)

Peterman Glacier connection
The mega-canyon has relevance today because it “extends from almost the center of the island and ends beneath the Peterman Glacier found in northern Greenland. The researchers believe the canyon plays an important role in transporting sub-glacial melt water from the interior of Greenland to the edge of the ice sheet into the ocean. Evidence suggests that before the presence of the ice sheet, as much as 4 million years ago, water flowed in the canyon from the interior to the coast and was a major river system. So the mega-canyon is a channel for water to travel from Greenland’s interior to the sea.(ref)Cole, Steve. "NASA Data Reveals Mega-Canyon under Greenland Ice Sheet." NASA, 29 Aug. 2013. Web. 29 Oct. 2013(/ref) A large portion of this data was collected from 2009 through 2012 by NASA's Operation Ice Bridge, an airborne science campaign that studies polar ice. One of Ice Bridge’s scientific instruments, the Multichannel Coherent Radar Depth Sounder, operated by the Center for the Remote Sensing of Ice Sheets at the University of Kansas, can see through vast layers of ice to measure its thickness and the shape of bedrock below. In their analysis of the radar data, the team discovered a continuous bedrock canyon that extends from almost the center of the island and ends beneath the Peterman Glacier fjord in northern Greenland. At certain frequencies, radio waves can travel through the ice and bounce off the bedrock underneath. The time the radio waves took to bounce back helped researchers determine the depth of the canyon. The longer it took, the deeper the bedrock feature. "Two things helped lead to this discovery," said Michael Studinger, Ice Bridge project scientist at NASA's Goddard Space Flight Center in Greenbelt, Md. "It was the enormous amount of data collected by Ice Bridge and the work of combining it with other datasets into a Greenland-wide compilation of all existing data that makes this feature appear in front of our eyes."(ref)Romm, Joe. "Good News, Bad News On ‘Mega-Canyon’ Found Under Greenland Ice Sheet." Think Progress RSS. N.p., 3 Sept. 2013. Web. 29 Oct. 2013(/ref)

The above was deleted from the article in 2015. Some such content about the relationship to the Petermann Glacier seems important to include in the article.-71.174.179.158 (talk) 22:13, 4 January 2017 (UTC)