\r\rPanelists include: Tom Wagner (cryosphere program scientist with NASA's Earth Science Division), Laurence Smith (chair of the University of California, Los Angeles Department of Geography), Mike Bevis (professor of geodynamics at Ohio State University in Columbus), Sophie Nowicki (physical scientist at Goddard), and Josh Willis (JPL).
\r\rThe Friday program will air live on NASA TV and stream online at: https://www.nasa.gov/nasatv. To ask questions via social media during the televised event, use the hashtag #askNASA.
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Earth spins once before camera zooms into West Atlantic, East Pacific, and West Pacific regions. 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Earth spins once before camera zooms into West Atlantic, East Pacific, and West Pacific regions. ", "width": 1024, "height": 576, "pixels": 589824 } }, { "id": 4328, "url": "https://svs.gsfc.nasa.gov/4328/", "page_type": "Visualization", "title": "Greenland's Glaciers as seen by RadarSat", "description": "An animation up the Greenland's Sermilik Fjord to the calving front of the Helheim Glacier, showing the glacier front's change between 2000 to 2013This video is also available on our YouTube channel. || Helheim_radarsat_4k.0800_print.jpg (1024x576) [242.6 KB] || Helheim_radarsat_4k.0800_searchweb.png (180x320) [121.8 KB] || Helheim_radarsat_4k.0800_web.png (320x180) [121.8 KB] || Helheim_radarsat_4k.0800_thm.png (80x40) [7.6 KB] || Helheim_radarsat_4k_1080p30.mp4 (1920x1080) [84.5 MB] || Helheim_radarsat_4k_720p30.mp4 (1280x720) [43.3 MB] || Helheim_radarsat_4k_2160p30.webm (3840x2160) [16.2 MB] || Helheim (3840x2160) [256.0 KB] || Helheim_radarsat_4k_2160p30.mp4 (3840x2160) [225.6 MB] || ", "release_date": "2015-08-25T00:00:00-04:00", "update_date": "2024-12-15T00:05:29.329494-05:00", "main_image": { "id": 441733, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004300/a004328/Helheim_radarsat_4k.0800_print.jpg", "filename": "Helheim_radarsat_4k.0800_print.jpg", "media_type": "Image", "alt_text": "An animation up the Greenland's Sermilik Fjord to the calving front of the Helheim Glacier, showing the glacier front's change between 2000 to 2013This video is also available on our YouTube channel.", "width": 1024, "height": 576, "pixels": 589824 } }, { "id": 11862, "url": "https://svs.gsfc.nasa.gov/11862/", "page_type": "Produced Video", "title": "Operation IceBridge Arctic 2015 video series", "description": "For more IceBridge videos NASA’s Operation IceBridge has wrapped up its 2015 Arctic field campaign after covering a vast expanse of science targets during 33 different flights over land ice, sea ice, and glaciers. The airborne campaign flies over the Arctic and Antarctic every year measuring changes in the ice with instruments like radar and lasers. For more on IceBridge, visit NASA's IceBridge webpage. || ", "release_date": "2015-04-22T14:00:00-04:00", "update_date": "2023-05-03T13:49:46.157158-04:00", "main_image": { "id": 443711, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011800/a011862/Helheim_instagram_print.jpg", "filename": "Helheim_instagram_print.jpg", "media_type": "Image", "alt_text": "Helheim Footage for Instagram This flight footage was taken from the cockpit of a NASA C-130 aircraft en route to the Helheim Glacier in eastern Greenland. Helheim has shrunk considerably in recent years. (Music courtesy Moby.)", "width": 1024, "height": 576, "pixels": 589824 } }, { "id": 4022, "url": "https://svs.gsfc.nasa.gov/4022/", "page_type": "Visualization", "title": "Measuring Elevation Changes on the Greenland Ice Sheet", "description": "Since the late 1970's, NASA has been monitoring changes in the Greenland Ice Sheet. Recent analysis of seven years of surface elevation readings from NASA's ICESat satellite and four years of laser and and ice-penetrating radar data from NASA's airborne mission Operation IceBridge shows us how the surface elevation of the ice sheet has changed.The colors shown on the surface of the ice sheet represent the accumulated change in elevation since 2003. The light yellow over the central region of the ice sheet indicates a slight thickening due to snow. This accumulation, along with the weight of the ice sheet, pushes ice toward the coast. Thinning near coastal regions, shown in green, blue and purple, has increased over time and now extends into the interior of the ice sheet where the bedrock topography permits. As a result, there has been an average loss of 300 cubic kilometers of ice per year between 2003 and 2012.This animation portrays the changes occurring in the surface elevation of the ice sheet since 2003 in three drainage regions: the southeast, the northeast and the Jakobshavn regions. In each region, the time advances to show the accumulated change in elevation from 2003 through 2012.—>