{ "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, "height": 1080, "pixels": 2073600 }, "main_video": { "id": 462592, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_V05_p30_1080.mp4", "filename": "canale_grande_V05_p30_1080.mp4", "media_type": "Movie", "alt_text": "Animation of Greenland's mega-canyon.This video is also available on our YouTube channel.", "width": 1920, "height": 1080, "pixels": 2073600 }, "main_credits": { "Visualizations by": [ { "name": "Cindy Starr", "employer": "Global Science and Technology, Inc." } ] }, "progress": "Complete", "media_groups": [ { "id": 343419, "url": "https://svs.gsfc.nasa.gov/4097/#media_group_343419", "widget": "Basic text with HTML", "title": "", "caption": "", "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.", "items": [], "extra_data": {} }, { "id": 343420, "url": "https://svs.gsfc.nasa.gov/4097/#media_group_343420", "widget": "Video player", "title": "", "caption": "", "description": "Animation of Greenland's mega-canyon.
This video is also available on our YouTube channel.
", "items": [ { "id": 299286, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "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, "height": 1080, "pixels": 2073600 } }, { "id": 299284, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462590, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_V05_p30.0406_web.png", "filename": "canale_grande_V05_p30.0406_web.png", "media_type": "Image", "alt_text": "Animation of Greenland's mega-canyon.This video is also available on our YouTube channel.", "width": 320, "height": 180, "pixels": 57600 } }, { "id": 299285, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462591, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_V05_p30.0406_thm.png", "filename": "canale_grande_V05_p30.0406_thm.png", "media_type": "Image", "alt_text": "Animation of Greenland's mega-canyon.This video is also available on our YouTube channel.", "width": 80, "height": 40, "pixels": 3200 } }, { "id": 299279, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462592, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_V05_p30_1080.mp4", "filename": "canale_grande_V05_p30_1080.mp4", "media_type": "Movie", "alt_text": "Animation of Greenland's mega-canyon.This video is also available on our YouTube channel.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 299280, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462593, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_V05_p30_720.mp4", "filename": "canale_grande_V05_p30_720.mp4", "media_type": "Movie", "alt_text": "Animation of Greenland's mega-canyon.This video is also available on our YouTube channel.", "width": 1280, "height": 720, "pixels": 921600 } }, { "id": 299282, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462588, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/frames/1920x1080_16x9_30p/composite/", "filename": "composite", "media_type": "Frames", "alt_text": "Animation of Greenland's mega-canyon.This video is also available on our YouTube channel.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 299283, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462589, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/frames/1920x1080_16x9_60p/composite/", "filename": "composite", "media_type": "Frames", "alt_text": "Animation of Greenland's mega-canyon.This video is also available on our YouTube channel.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 299287, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462595, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_V05_p30_1080.webmhd.webm", "filename": "canale_grande_V05_p30_1080.webmhd.webm", "media_type": "Movie", "alt_text": "Animation of Greenland's mega-canyon.This video is also available on our YouTube channel.", "width": 960, "height": 540, "pixels": 518400 } }, { "id": 299281, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462594, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_V05_p30_360.mp4", "filename": "canale_grande_V05_p30_360.mp4", "media_type": "Movie", "alt_text": "Animation of Greenland's mega-canyon.This video is also available on our YouTube channel.", "width": 640, "height": 360, "pixels": 230400 } } ], "extra_data": {} }, { "id": 343421, "url": "https://svs.gsfc.nasa.gov/4097/#media_group_343421", "widget": "Video player", "title": "", "caption": "", "description": "The above visualization with the color scale shown in the upper right corner.", "items": [ { "id": 299290, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462598, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_withCBAR.0450_print.jpg", "filename": "canale_grande_withCBAR.0450_print.jpg", "media_type": "Image", "alt_text": "The above visualization with the color scale shown in the upper right corner.", "width": 1024, "height": 576, "pixels": 589824 } }, { "id": 299288, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462597, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_withColorBar_1080p30.mp4", "filename": "canale_grande_withColorBar_1080p30.mp4", "media_type": "Movie", "alt_text": "The above visualization with the color scale shown in the upper right corner.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 299289, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462599, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_withColorBar_1080p30.webm", "filename": "canale_grande_withColorBar_1080p30.webm", "media_type": "Movie", "alt_text": "The above visualization with the color scale shown in the upper right corner.", "width": 1920, "height": 1080, "pixels": 2073600 } } ], "extra_data": {} }, { "id": 343422, "url": "https://svs.gsfc.nasa.gov/4097/#media_group_343422", "widget": "Single image", "title": "", "caption": "", "description": "The color scale applied to the topography.", "items": [ { "id": 299291, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462600, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/GreenlandTopo_Cbar.png", "filename": "GreenlandTopo_Cbar.png", "media_type": "Image", "alt_text": "The color scale applied to the topography.", "width": 320, "height": 90, "pixels": 28800 } } ], "extra_data": {} }, { "id": 343423, "url": "https://svs.gsfc.nasa.gov/4097/#media_group_343423", "widget": "Single image", "title": "", "caption": "", "description": "A print resolution still image Greenland's topography displayed in false-color based on the elevation with the Greenland Ice Sheet shown partially removed. Regions of the topography above sea level are shown in shades of green while areas below zero are coloured by shades of brown. Yellow indicates the area near sea level. The topography is exaggerated by 19.5 times.", "items": [ { "id": 299296, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462605, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_V05.0534.jpg", "filename": "canale_grande_V05.0534.jpg", "media_type": "Image", "alt_text": "A print resolution still image Greenland's topography displayed in false-color based on the elevation with the Greenland Ice Sheet shown partially removed. Regions of the topography above sea level are shown in shades of green while areas below zero are coloured by shades of brown. Yellow indicates the area near sea level. The topography is exaggerated by 19.5 times.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 299295, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462602, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_V05.0534_web.png", "filename": "canale_grande_V05.0534_web.png", "media_type": "Image", "alt_text": "A print resolution still image Greenland's topography displayed in false-color based on the elevation with the Greenland Ice Sheet shown partially removed. Regions of the topography above sea level are shown in shades of green while areas below zero are coloured by shades of brown. Yellow indicates the area near sea level. The topography is exaggerated by 19.5 times.", "width": 320, "height": 180, "pixels": 57600 } }, { "id": 299294, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462601, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_V05.0534.tif", "filename": "canale_grande_V05.0534.tif", "media_type": "Image", "alt_text": "A print resolution still image Greenland's topography displayed in false-color based on the elevation with the Greenland Ice Sheet shown partially removed. Regions of the topography above sea level are shown in shades of green while areas below zero are coloured by shades of brown. Yellow indicates the area near sea level. The topography is exaggerated by 19.5 times.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 299292, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462603, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_v05_still_LG.0534.tif", "filename": "canale_grande_v05_still_LG.0534.tif", "media_type": "Image", "alt_text": "A print resolution still image Greenland's topography displayed in false-color based on the elevation with the Greenland Ice Sheet shown partially removed. Regions of the topography above sea level are shown in shades of green while areas below zero are coloured by shades of brown. Yellow indicates the area near sea level. The topography is exaggerated by 19.5 times.", "width": 5760, "height": 3240, "pixels": 18662400 } }, { "id": 299293, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462604, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_v05_still_MED.0534.tif", "filename": "canale_grande_v05_still_MED.0534.tif", "media_type": "Image", "alt_text": "A print resolution still image Greenland's topography displayed in false-color based on the elevation with the Greenland Ice Sheet shown partially removed. Regions of the topography above sea level are shown in shades of green while areas below zero are coloured by shades of brown. Yellow indicates the area near sea level. The topography is exaggerated by 19.5 times.", "width": 3840, "height": 2160, "pixels": 8294400 } } ], "extra_data": {} }, { "id": 343424, "url": "https://svs.gsfc.nasa.gov/4097/#media_group_343424", "widget": "Single image", "title": "", "caption": "", "description": "A print resolution still image Greenland's topography displayed in false-color based on the elevation. Regions of the topography above sea level are shown in shades of green while areas below zero are coloured by shades of brown. The canyon is evident meandering down the middle of Greenland colored in deep brown. Yellow indicates the area near sea level. The topography is exaggerated by 40 times.", "items": [ { "id": 299301, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462610, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_V05.0612.jpg", "filename": "canale_grande_V05.0612.jpg", "media_type": "Image", "alt_text": "A print resolution still image Greenland's topography displayed in false-color based on the elevation. Regions of the topography above sea level are shown in shades of green while areas below zero are coloured by shades of brown. The canyon is evident meandering down the middle of Greenland colored in deep brown. Yellow indicates the area near sea level. The topography is exaggerated by 40 times.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 299300, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462607, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_V05.0612_web.png", "filename": "canale_grande_V05.0612_web.png", "media_type": "Image", "alt_text": "A print resolution still image Greenland's topography displayed in false-color based on the elevation. Regions of the topography above sea level are shown in shades of green while areas below zero are coloured by shades of brown. The canyon is evident meandering down the middle of Greenland colored in deep brown. Yellow indicates the area near sea level. The topography is exaggerated by 40 times.", "width": 320, "height": 180, "pixels": 57600 } }, { "id": 299299, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462606, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_V05.0612.tif", "filename": "canale_grande_V05.0612.tif", "media_type": "Image", "alt_text": "A print resolution still image Greenland's topography displayed in false-color based on the elevation. Regions of the topography above sea level are shown in shades of green while areas below zero are coloured by shades of brown. The canyon is evident meandering down the middle of Greenland colored in deep brown. Yellow indicates the area near sea level. The topography is exaggerated by 40 times.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 299297, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462608, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_v05_still.0612_LG.tif", "filename": "canale_grande_v05_still.0612_LG.tif", "media_type": "Image", "alt_text": "A print resolution still image Greenland's topography displayed in false-color based on the elevation. Regions of the topography above sea level are shown in shades of green while areas below zero are coloured by shades of brown. The canyon is evident meandering down the middle of Greenland colored in deep brown. Yellow indicates the area near sea level. The topography is exaggerated by 40 times.", "width": 5760, "height": 3240, "pixels": 18662400 } }, { "id": 299298, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462609, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_v05_still.0612_MED.tif", "filename": "canale_grande_v05_still.0612_MED.tif", "media_type": "Image", "alt_text": "A print resolution still image Greenland's topography displayed in false-color based on the elevation. Regions of the topography above sea level are shown in shades of green while areas below zero are coloured by shades of brown. The canyon is evident meandering down the middle of Greenland colored in deep brown. Yellow indicates the area near sea level. The topography is exaggerated by 40 times.", "width": 3840, "height": 2160, "pixels": 8294400 } } ], "extra_data": {} }, { "id": 343425, "url": "https://svs.gsfc.nasa.gov/4097/#media_group_343425", "widget": "Single image", "title": "", "caption": "", "description": "A print resolution still image Greenland's topography displayed in false-color based on the elevation. Regions of the topography above sea level are shown in shades of green while areas below zero are coloured by shades of brown. The canyon is evident meandering down the middle of Greenland colored in deep brown. Yellow indicates the area near sea level. The topography is exaggerated by 40 times.", "items": [ { "id": 299306, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462615, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_V05.0812.jpg", "filename": "canale_grande_V05.0812.jpg", "media_type": "Image", "alt_text": "A print resolution still image Greenland's topography displayed in false-color based on the elevation. Regions of the topography above sea level are shown in shades of green while areas below zero are coloured by shades of brown. The canyon is evident meandering down the middle of Greenland colored in deep brown. Yellow indicates the area near sea level. The topography is exaggerated by 40 times.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 299305, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462612, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_V05.0812_web.png", "filename": "canale_grande_V05.0812_web.png", "media_type": "Image", "alt_text": "A print resolution still image Greenland's topography displayed in false-color based on the elevation. Regions of the topography above sea level are shown in shades of green while areas below zero are coloured by shades of brown. The canyon is evident meandering down the middle of Greenland colored in deep brown. Yellow indicates the area near sea level. The topography is exaggerated by 40 times.", "width": 320, "height": 180, "pixels": 57600 } }, { "id": 299304, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462611, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_V05.0812.tif", "filename": "canale_grande_V05.0812.tif", "media_type": "Image", "alt_text": "A print resolution still image Greenland's topography displayed in false-color based on the elevation. Regions of the topography above sea level are shown in shades of green while areas below zero are coloured by shades of brown. The canyon is evident meandering down the middle of Greenland colored in deep brown. Yellow indicates the area near sea level. The topography is exaggerated by 40 times.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 299302, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462613, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_v05_still.0812_LG.tif", "filename": "canale_grande_v05_still.0812_LG.tif", "media_type": "Image", "alt_text": "A print resolution still image Greenland's topography displayed in false-color based on the elevation. Regions of the topography above sea level are shown in shades of green while areas below zero are coloured by shades of brown. The canyon is evident meandering down the middle of Greenland colored in deep brown. Yellow indicates the area near sea level. The topography is exaggerated by 40 times.", "width": 5760, "height": 3240, "pixels": 18662400 } }, { "id": 299303, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462614, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_v05_still.0812_MED.tif", "filename": "canale_grande_v05_still.0812_MED.tif", "media_type": "Image", "alt_text": "A print resolution still image Greenland's topography displayed in false-color based on the elevation. Regions of the topography above sea level are shown in shades of green while areas below zero are coloured by shades of brown. The canyon is evident meandering down the middle of Greenland colored in deep brown. Yellow indicates the area near sea level. The topography is exaggerated by 40 times.", "width": 3840, "height": 2160, "pixels": 8294400 } } ], "extra_data": {} }, { "id": 343426, "url": "https://svs.gsfc.nasa.gov/4097/#media_group_343426", "widget": "Single image", "title": "", "caption": "", "description": "A print resolution still image showing the location of the canyon in blue on the surface of the ice sheet. The topography is exaggerated by 15 times.

", "items": [ { "id": 299311, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462620, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_map_MED.0451.jpg", "filename": "canale_grande_map_MED.0451.jpg", "media_type": "Image", "alt_text": "A print resolution still image showing the location of the canyon in blue on the surface of the ice sheet. The topography is exaggerated by 15 times.", "width": 3840, "height": 2160, "pixels": 8294400 } }, { "id": 299310, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462618, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_map_1080.0451_web.png", "filename": "canale_grande_map_1080.0451_web.png", "media_type": "Image", "alt_text": "A print resolution still image showing the location of the canyon in blue on the surface of the ice sheet. The topography is exaggerated by 15 times.", "width": 320, "height": 180, "pixels": 57600 } }, { "id": 299309, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462617, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_map_1080.0451.tif", "filename": "canale_grande_map_1080.0451.tif", "media_type": "Image", "alt_text": "A print resolution still image showing the location of the canyon in blue on the surface of the ice sheet. The topography is exaggerated by 15 times.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 299307, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462619, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_map_LG.0451.tif", "filename": "canale_grande_map_LG.0451.tif", "media_type": "Image", "alt_text": "A print resolution still image showing the location of the canyon in blue on the surface of the ice sheet. The topography is exaggerated by 15 times.", "width": 5760, "height": 3240, "pixels": 18662400 } }, { "id": 299308, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462616, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_map_MED.0451.tif", "filename": "canale_grande_map_MED.0451.tif", "media_type": "Image", "alt_text": "A print resolution still image showing the location of the canyon in blue on the surface of the ice sheet. The topography is exaggerated by 15 times.", "width": 3840, "height": 2160, "pixels": 8294400 } } ], "extra_data": {} }, { "id": 343427, "url": "https://svs.gsfc.nasa.gov/4097/#media_group_343427", "widget": "Video player", "title": "", "caption": "", "description": "The Earth layer alone with transparency at gamma 1.0.", "items": [ { "id": 299315, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462625, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_V04_earth_30p.0460.jpg", "filename": "canale_grande_V04_earth_30p.0460.jpg", "media_type": "Image", "alt_text": "The Earth layer alone with transparency at gamma 1.0.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 299314, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462624, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_V04_earth.0460_web.png", "filename": "canale_grande_V04_earth.0460_web.png", "media_type": "Image", "alt_text": "The Earth layer alone with transparency at gamma 1.0.", "width": 320, "height": 180, "pixels": 57600 } }, { "id": 299312, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462622, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/frames/1920x1080_16x9_30p/earth/", "filename": "earth", "media_type": "Frames", "alt_text": "The Earth layer alone with transparency at gamma 1.0.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 299313, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462623, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/frames/1920x1080_16x9_60p/earth/", "filename": "earth", "media_type": "Frames", "alt_text": "The Earth layer alone with transparency at gamma 1.0.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 299316, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462621, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_V04_earth_30p.mp4", "filename": "canale_grande_V04_earth_30p.mp4", "media_type": "Movie", "alt_text": "The Earth layer alone with transparency at gamma 1.0.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 299317, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462626, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_V04_earth_30p.webm", "filename": "canale_grande_V04_earth_30p.webm", "media_type": "Movie", "alt_text": "The Earth layer alone with transparency at gamma 1.0.", "width": 1920, "height": 1080, "pixels": 2073600 } } ], "extra_data": {} }, { "id": 343428, "url": "https://svs.gsfc.nasa.gov/4097/#media_group_343428", "widget": "Video player", "title": "", "caption": "", "description": "The atmosphere layer alone with transparency at gamma 1.0.

", "items": [ { "id": 299322, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462631, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_V04_atmos_30p.0460_print.jpg", "filename": "canale_grande_V04_atmos_30p.0460_print.jpg", "media_type": "Image", "alt_text": "The atmosphere layer alone with transparency at gamma 1.0.", "width": 1024, "height": 576, "pixels": 589824 } }, { "id": 299323, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462632, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_V04_atmos_30p.0460_web.png", "filename": "canale_grande_V04_atmos_30p.0460_web.png", "media_type": "Image", "alt_text": "The atmosphere layer alone with transparency at gamma 1.0.", "width": 320, "height": 180, "pixels": 57600 } }, { "id": 299318, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462627, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_V04_atmos_30p.mp4", "filename": "canale_grande_V04_atmos_30p.mp4", "media_type": "Movie", "alt_text": "The atmosphere layer alone with transparency at gamma 1.0.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 299319, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462630, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_V04_atmos_30p.webm", "filename": "canale_grande_V04_atmos_30p.webm", "media_type": "Movie", "alt_text": "The atmosphere layer alone with transparency at gamma 1.0.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 299320, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462628, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/frames/1920x1080_16x9_30p/atmosphere/", "filename": "atmosphere", "media_type": "Frames", "alt_text": "The atmosphere layer alone with transparency at gamma 1.0.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 299321, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462629, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/frames/1920x1080_16x9_60p/atmosphere/", "filename": "atmosphere", "media_type": "Frames", "alt_text": "The atmosphere layer alone with transparency at gamma 1.0.", "width": 1920, "height": 1080, "pixels": 2073600 } } ], "extra_data": {} }, { "id": 343429, "url": "https://svs.gsfc.nasa.gov/4097/#media_group_343429", "widget": "Video player", "title": "", "caption": "", "description": "The star layer alone at gamma 1.0.", "items": [ { "id": 299327, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462637, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_V04_stars.0460.jpg", "filename": "canale_grande_V04_stars.0460.jpg", "media_type": "Image", "alt_text": "The star layer alone at gamma 1.0.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 299326, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462636, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_V04_stars.0460_web.png", "filename": "canale_grande_V04_stars.0460_web.png", "media_type": "Image", "alt_text": "The star layer alone at gamma 1.0.", "width": 320, "height": 180, "pixels": 57600 } }, { "id": 299324, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462634, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/frames/1920x1080_16x9_30p/stars/", "filename": "stars", "media_type": "Frames", "alt_text": "The star layer alone at gamma 1.0.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 299325, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462635, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/frames/1920x1080_16x9_60p/stars/", "filename": "stars", "media_type": "Frames", "alt_text": "The star layer alone at gamma 1.0.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 299328, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462633, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_V04_stars_30p.mp4", "filename": "canale_grande_V04_stars_30p.mp4", "media_type": "Movie", "alt_text": "The star layer alone at gamma 1.0.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 299329, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 462638, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004097/canale_grande_V04_stars_30p.webm", "filename": "canale_grande_V04_stars_30p.webm", "media_type": "Movie", "alt_text": "The star layer alone at gamma 1.0.", "width": 1920, "height": 1080, "pixels": 2073600 } } ], "extra_data": {} } ], "studio": "svs", "funding_sources": [ "ESE" ], "credits": [ { "role": "Visualizer", "people": [ { "name": "Cindy Starr", "employer": "Global Science and Technology, Inc." } ] }, { "role": "Animator", "people": [ { "name": "Greg Shirah", "employer": "NASA/GSFC" } ] }, { "role": "Producer", "people": [ { "name": "Jefferson Beck", "employer": "USRA" } ] }, { "role": "Scientist", "people": [ { "name": "J. L. Bamber", "employer": "School of Geographical Sciences, University of Bristol, UK" }, { "name": "Michael Studinger", "employer": "NASA/GSFC" } ] }, { "role": "Project support", "people": [ { "name": "Laurence Schuler", "employer": "ADNET Systems, Inc." }, { "name": "Ian Jones", "employer": "ADNET Systems, Inc." } ] } ], "missions": [ "Operation IceBridge", "Terra" ], "series": [], "tapes": [], "papers": [ "

Bamber, J.L., Siegert, M.J., Griggs, J.A., Marshall, S., Spada, G. Paleofluvial canyon drains subglacial water from northern Greenland, Science, 2013.

Bamber, J. L., Griggs, J. A., Hurkmans, R. T. W. L., Dowdeswell, J. A., Gogineni, S. P., Howat, I., Mouginot, J., Paden, J., Palmer, S., Rignot, E., and Steinhage, D.: A new bed elevation dataset for Greenland, The Cryosphere, 7, 499-510, 10.5194/tc-7-499-2013, 2013. (Available here.)", "

Bamber, J.L., Siegert, M.J., Griggs, J.A., Marshall, S., Spada, G. Paleofluvial canyon drains subglacial water from northern Greenland, Science, 2013.

Bamber, J. L., Griggs, J. A., Hurkmans, R. T. W. L., Dowdeswell, J. A., Gogineni, S. P., Howat, I., Mouginot, J., Paden, J., Palmer, S., Rignot, E., and Steinhage, D.: A new bed elevation dataset for Greenland, The Cryosphere, 7, 499-510, 10.5194/tc-7-499-2013, 2013. (Available here.)" ], "datasets": [ { "name": "Blue Marble: Next Generation", "common_name": "BMNG", "platform": "Terra and Aqua", "sensor": "MODIS", "type": "Other", "organizations": [], "description": "", "credit": "The Blue Marble data is courtesy of Reto Stockli (NASA/GSFC).", "url": "http://earthobservatory.nasa.gov/Newsroom/BlueMarble/", "date_range": "2004" }, { "name": "Greenland Mapping Project (GIMP) Digital Elevation Model", "common_name": "GIMP Greenland DEM", "platform": null, "sensor": null, "type": "Data Compilation", "organizations": [ "Courtesy of Ian Howat, OSU" ], "description": "", "credit": "", "url": "", "date_range": "2003 - 2009" }, { "name": "Greenland bed elevation dataset by Bamber, et al., 2013", "common_name": "", "platform": null, "sensor": null, "type": "Data Compilation", "organizations": [ "Bristol Glaciology Centre, University of Bristol" ], "description": "", "credit": "", "url": "", "date_range": "1970 - 2012" } ], "nasa_science_categories": [ "Earth" ], "keywords": [ "Cryosphere", "Earth Science", "Glaciers/Ice Sheets", "HDTV", "Hydrosphere", "Ice Sheets", "Land Surface", "Physical geography", "Topographic Effects", "Topographical Relief", "topography" ], "recommended_pages": [], "related": [ { "id": 11350, "url": "https://svs.gsfc.nasa.gov/11350/", "page_type": "Produced Video", "title": "Megacanyon", "description": "Ice has blanketed Greenland for millions of years. In some places it can be almost two miles thick. Scientists now know that hidden beneath the ice is a canyon that extends hundreds of miles north from near the center of the ice sheet. By combining more than four years’ worth of ice-penetrating radar measurements from NASA’s Operation IceBridge mission with other data sets, researchers created a topographic map of Greenland’s bedrock. The map shed light on the existence of a canyon that measures at least 460 miles in length and a half-mile deep. At greater than 1.5 times the length of the Grand Canyon, it is longer than any known canyon on Earth. Watch the visualization for a tour of Greenland’s massive, under-ice canyon. In the visualization the terrain elevation is shown using color, where greens indicate areas above sea level, browns indicate areas below sea level, and yellows indicate areas at or near sea level. || ", "release_date": "2013-09-17T00:00:00-04:00", "update_date": "2023-05-03T13:51:52.015896-04:00", "main_image": { "id": 462290, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011300/a011350/covern-1024.jpg", "filename": "covern-1024.jpg", "media_type": "Image", "alt_text": "Scientists have discovered a giant canyon buried under ice.", "width": 1024, "height": 576, "pixels": 589824 } } ], "sources": [], "products": [], "newer_versions": [], "older_versions": [], "alternate_versions": [] }