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            "description": "See [NASA.gov](http://www.nasa.gov/content/goddard/nasa-data-reveals-mega-canyon-under-greenland-ice/#.UjM75lPX9QM)",
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        {
            "id": 4097,
            "url": "https://svs.gsfc.nasa.gov/4097/",
            "page_type": "Visualization",
            "title": "Greenland's Mega-Canyon beneath the Ice Sheet",
            "description": "Subglacial topography plays an important role in modulating the distribution and flow of meltwater beneath the ice known as basal water flow. This animation portrays topographic data of the bedrock under the Greenland ice sheet derived from ice-penetrating radar data. Clearly evident in the topography is a 750-km-long subglacial canyon in northern Greenland that is likely to have influenced basal water flow from the ice sheet interior to the margin. The authors suggest that the mega-canyon predates ice sheet inception and has influenced basal hydrology in Greenland over past glacial cycles. (See reference under \"Science Paper\" below)Starting with a view of the surface of Greenland, the animation zooms closer to the surface as the ice sheet is stripped away to reveal the false-color topography of the bedrock that lies beneath. Regions above sea level are shown in shades of green while areas below zero are colored by shades of brown. Yellow indicates the area near sea level. The topography is exaggerated from 12 to 40 times in order to accentuate the topographic relief. Visible in the topography from about the midpoint of Greenland to its Northwest coast is the 750-km-long subglacial canyon described by the authors. || ",
            "release_date": "2013-08-29T14:00:00-04:00",
            "update_date": "2023-05-03T13:51:53.780411-04:00",
            "main_image": {
                "id": 462596,
                "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_V05.0740.jpg",
                "filename": "canale_grande_V05.0740.jpg",
                "media_type": "Image",
                "alt_text": "Animation of Greenland's mega-canyon.This video is also available on our YouTube channel.",
                "width": 1920,
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                "pixels": 2073600
            }
        }
    ],
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