{ "id": 3928, "url": "https://svs.gsfc.nasa.gov/3928/", "page_type": "Visualization", "title": "North America Snow Cover 2009-2012", "description": "This entry features visualization material of daily snow cover over North America from July 1, 2009 - March 11, 2012 and still images of snow cover in the Western region of United States. || ", "release_date": "2012-04-07T00:00:00-04:00", "update_date": "2023-05-03T13:53:09.274838-04:00", "main_image": { "id": 477075, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/SnowCoverMapNA_1280x72030fps_1205_web.png", "filename": "SnowCoverMapNA_1280x72030fps_1205_web.png", "media_type": "Image", "alt_text": "Visualization of North America Snow Cover Map for the period of July 1, 2009 - March 11, 2012.", "width": 320, "height": 180, "pixels": 57600 }, "main_video": { "id": 477079, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/SnowCoverMapNA_1920x108030fps.mp4", "filename": "SnowCoverMapNA_1920x108030fps.mp4", "media_type": "Movie", "alt_text": "Visualization of North America Snow Cover Map for the period of July 1, 2009 - March 11, 2012.", "width": 1920, "height": 1080, "pixels": 2073600 }, "main_credits": { "Visualizations by": [ { "name": "Helen-Nicole Kostis", "employer": "USRA" } ] }, "progress": "Complete", "media_groups": [ { "id": 349535, "url": "https://svs.gsfc.nasa.gov/3928/#media_group_349535", "widget": "Basic text with HTML", "title": "", "caption": "", "description": "This entry features visualization material of daily snow cover over North America from July 1, 2009 - March 11, 2012 and still images of snow cover in the Western region of United States.", "items": [], "extra_data": {} }, { "id": 349536, "url": "https://svs.gsfc.nasa.gov/3928/#media_group_349536", "widget": "Video player", "title": "", "caption": "", "description": "Visualization of North America Snow Cover Map for the period of July 1, 2009 - March 11, 2012.", "items": [ { "id": 321976, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477081, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/SnowCoverMapNA_1920x108060fps_1205.jpg", "filename": "SnowCoverMapNA_1920x108060fps_1205.jpg", "media_type": "Image", "alt_text": "Visualization of North America Snow Cover Map for the period of July 1, 2009 - March 11, 2012.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 321974, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477075, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/SnowCoverMapNA_1280x72030fps_1205_web.png", "filename": "SnowCoverMapNA_1280x72030fps_1205_web.png", "media_type": "Image", "alt_text": "Visualization of North America Snow Cover Map for the period of July 1, 2009 - March 11, 2012.", "width": 320, "height": 180, "pixels": 57600 } }, { "id": 321975, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477076, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/SnowCoverMapNA_1280x72030fps_1205_thm.png", "filename": "SnowCoverMapNA_1280x72030fps_1205_thm.png", "media_type": "Image", "alt_text": "Visualization of North America Snow Cover Map for the period of July 1, 2009 - March 11, 2012.", "width": 80, "height": 40, "pixels": 3200 } }, { "id": 321969, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477079, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/SnowCoverMapNA_1920x108030fps.mp4", "filename": "SnowCoverMapNA_1920x108030fps.mp4", "media_type": "Movie", "alt_text": "Visualization of North America Snow Cover Map for the period of July 1, 2009 - March 11, 2012.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 321970, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477080, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/SnowCoverMapNA_1280x72030fps.mp4", "filename": "SnowCoverMapNA_1280x72030fps.mp4", "media_type": "Movie", "alt_text": "Visualization of North America Snow Cover Map for the period of July 1, 2009 - March 11, 2012.", "width": 1280, "height": 720, "pixels": 921600 } }, { "id": 321971, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477077, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/frames/1920x1080_16x9_60p/composite/", "filename": "composite", "media_type": "Frames", "alt_text": "Visualization of North America Snow Cover Map for the period of July 1, 2009 - March 11, 2012.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 321972, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477078, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/frames/1920x1080_16x9_30p/composite/", "filename": "composite", "media_type": "Frames", "alt_text": "Visualization of North America Snow Cover Map for the period of July 1, 2009 - March 11, 2012.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 321973, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477074, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/frames/1280x720_16x9_30p/composite/", "filename": "composite", "media_type": "Frames", "alt_text": "Visualization of North America Snow Cover Map for the period of July 1, 2009 - March 11, 2012.", "width": 1280, "height": 720, "pixels": 921600 } }, { "id": 321977, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477082, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/SnowCoverMapNA_1920x108030fps.webmhd.webm", "filename": "SnowCoverMapNA_1920x108030fps.webmhd.webm", "media_type": "Movie", "alt_text": "Visualization of North America Snow Cover Map for the period of July 1, 2009 - March 11, 2012.", "width": 960, "height": 540, "pixels": 518400 } } ], "extra_data": {} }, { "id": 349537, "url": "https://svs.gsfc.nasa.gov/3928/#media_group_349537", "widget": "Video player", "title": "", "caption": "", "description": "This set of frames provides the layer of the dates only, with alpha channel.", "items": [ { "id": 321981, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477086, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/SnowCoverMapNADatesOnly_1920x108060fps_2412_print.jpg", "filename": "SnowCoverMapNADatesOnly_1920x108060fps_2412_print.jpg", "media_type": "Image", "alt_text": "This set of frames provides the layer of the dates only, with alpha channel.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 321980, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477084, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/SnowCoverMapNADatesOnly_1920x108060fps_2412_web.png", "filename": "SnowCoverMapNADatesOnly_1920x108060fps_2412_web.png", "media_type": "Image", "alt_text": "This set of frames provides the layer of the dates only, with alpha channel.", "width": 320, "height": 180, "pixels": 57600 } }, { "id": 321978, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477083, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/frames/1920x1080_16x9_60p/DatesLayer/", "filename": "DatesLayer", "media_type": "Frames", "alt_text": "This set of frames provides the layer of the dates only, with alpha channel.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 321979, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477085, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/frames/1920x1080_16x9_30p/DatesLayer/", "filename": "DatesLayer", "media_type": "Frames", "alt_text": "This set of frames provides the layer of the dates only, with alpha channel.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 321982, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477087, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/SnowCoverMapNADatesOnly_1920x108030fps_0001.mp4", "filename": "SnowCoverMapNADatesOnly_1920x108030fps_0001.mp4", "media_type": "Movie", "alt_text": "This set of frames provides the layer of the dates only, with alpha channel.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 321983, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477088, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/SnowCoverMapNADatesOnly_1920x108030fps_0001.webm", "filename": "SnowCoverMapNADatesOnly_1920x108030fps_0001.webm", "media_type": "Movie", "alt_text": "This set of frames provides the layer of the dates only, with alpha channel.", "width": 1920, "height": 1080, "pixels": 2073600 } } ], "extra_data": {} }, { "id": 349538, "url": "https://svs.gsfc.nasa.gov/3928/#media_group_349538", "widget": "Video player", "title": "", "caption": "", "description": "This set of frames provides the visualization of North America Snow Cover Map without dates.", "items": [ { "id": 321990, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477094, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/SnowCoverNA_031112_3200x2160.jpg", "filename": "SnowCoverNA_031112_3200x2160.jpg", "media_type": "Image", "alt_text": "This set of frames provides the visualization of North America Snow Cover Map without dates.", "width": 3200, "height": 1800, "pixels": 5760000 } }, { "id": 321988, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477090, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/SnowCoverNA_1920x1080.2412_web.png", "filename": "SnowCoverNA_1920x1080.2412_web.png", "media_type": "Image", "alt_text": "This set of frames provides the visualization of North America Snow Cover Map without dates.", "width": 320, "height": 180, "pixels": 57600 } }, { "id": 321985, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477093, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/SnowCoverMapLayerOnlyNA_1920x108030fps.mp4", "filename": "SnowCoverMapLayerOnlyNA_1920x108030fps.mp4", "media_type": "Movie", "alt_text": "This set of frames provides the visualization of North America Snow Cover Map without dates.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 321986, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477089, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/frames/1920x1080_16x9_60p/SnowCoverLayer/", "filename": "SnowCoverLayer", "media_type": "Frames", "alt_text": "This set of frames provides the visualization of North America Snow Cover Map without dates.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 321987, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477092, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/frames/1920x1080_16x9_30p/SnowCoverLayer/", "filename": "SnowCoverLayer", "media_type": "Frames", "alt_text": "This set of frames provides the visualization of North America Snow Cover Map without dates.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 321989, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477095, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/SnowCoverMapLayerOnlyNA_1920x108030fps.webmhd.webm", "filename": "SnowCoverMapLayerOnlyNA_1920x108030fps.webmhd.webm", "media_type": "Movie", "alt_text": "This set of frames provides the visualization of North America Snow Cover Map without dates.", "width": 960, "height": 540, "pixels": 518400 } }, { "id": 321984, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477091, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/SnowCoverNA_031112_3200x2160.tif", "filename": "SnowCoverNA_031112_3200x2160.tif", "media_type": "Image", "alt_text": "This set of frames provides the visualization of North America Snow Cover Map without dates.", "width": 3200, "height": 1800, "pixels": 5760000 } } ], "extra_data": {} }, { "id": 349539, "url": "https://svs.gsfc.nasa.gov/3928/#media_group_349539", "widget": "Single image", "title": "", "caption": "", "description": "Close-up view of Snow Cover in US West, on December 20, 2011.", "items": [ { "id": 321994, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477099, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/USWest_122011_3840x21460.2211.jpg", "filename": "USWest_122011_3840x21460.2211.jpg", "media_type": "Image", "alt_text": "Close-up view of Snow Cover in US West, on December 20, 2011.", "width": 3840, "height": 2160, "pixels": 8294400 } }, { "id": 321993, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477097, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/USWest_122011_3840x21460.2211_web.png", "filename": "USWest_122011_3840x21460.2211_web.png", "media_type": "Image", "alt_text": "Close-up view of Snow Cover in US West, on December 20, 2011.", "width": 320, "height": 180, "pixels": 57600 } }, { "id": 321992, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477098, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/USWest_122011_1920x1080.tif", "filename": "USWest_122011_1920x1080.tif", "media_type": "Image", "alt_text": "Close-up view of Snow Cover in US West, on December 20, 2011.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 321991, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477096, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/USWest_122011_3840x21460.2211.tif", "filename": "USWest_122011_3840x21460.2211.tif", "media_type": "Image", "alt_text": "Close-up view of Snow Cover in US West, on December 20, 2011.", "width": 3840, "height": 2160, "pixels": 8294400 } } ], "extra_data": {} }, { "id": 349540, "url": "https://svs.gsfc.nasa.gov/3928/#media_group_349540", "widget": "Single image", "title": "", "caption": "", "description": "Close-up view of Snow Cover in US West, on January 5, 2012.", "items": [ { "id": 321998, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477103, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/USWest_010512_3840x21460.2249.jpg", "filename": "USWest_010512_3840x21460.2249.jpg", "media_type": "Image", "alt_text": "Close-up view of Snow Cover in US West, on January 5, 2012.", "width": 3840, "height": 2160, "pixels": 8294400 } }, { "id": 321997, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477101, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/USWest_010512_3840x21460.2249_web.png", "filename": "USWest_010512_3840x21460.2249_web.png", "media_type": "Image", "alt_text": "Close-up view of Snow Cover in US West, on January 5, 2012.", "width": 320, "height": 180, "pixels": 57600 } }, { "id": 321996, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477102, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/USWest_010512_1920x1080.2249.tif", "filename": "USWest_010512_1920x1080.2249.tif", "media_type": "Image", "alt_text": "Close-up view of Snow Cover in US West, on January 5, 2012.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 321995, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477100, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/USWest_010512_3840x21460.2249.tif", "filename": "USWest_010512_3840x21460.2249.tif", "media_type": "Image", "alt_text": "Close-up view of Snow Cover in US West, on January 5, 2012.", "width": 3840, "height": 2160, "pixels": 8294400 } } ], "extra_data": {} }, { "id": 349541, "url": "https://svs.gsfc.nasa.gov/3928/#media_group_349541", "widget": "Single image", "title": "", "caption": "", "description": "Close-up view of Snow Cover in US West, on February 1, 2012.", "items": [ { "id": 322002, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477107, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/USWest_020112_3840x2160.2302.jpg", "filename": "USWest_020112_3840x2160.2302.jpg", "media_type": "Image", "alt_text": "Close-up view of Snow Cover in US West, on February 1, 2012.", "width": 3840, "height": 2160, "pixels": 8294400 } }, { "id": 322001, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477105, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/USWest_020112_3840x2160.2302_web.png", "filename": "USWest_020112_3840x2160.2302_web.png", "media_type": "Image", "alt_text": "Close-up view of Snow Cover in US West, on February 1, 2012.", "width": 320, "height": 180, "pixels": 57600 } }, { "id": 322000, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477106, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/USWest_020112_1920x1080.2302.tif", "filename": "USWest_020112_1920x1080.2302.tif", "media_type": "Image", "alt_text": "Close-up view of Snow Cover in US West, on February 1, 2012.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 321999, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477104, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/USWest_020112_3840x2160.2302.tif", "filename": "USWest_020112_3840x2160.2302.tif", "media_type": "Image", "alt_text": "Close-up view of Snow Cover in US West, on February 1, 2012.", "width": 3840, "height": 2160, "pixels": 8294400 } } ], "extra_data": {} }, { "id": 349542, "url": "https://svs.gsfc.nasa.gov/3928/#media_group_349542", "widget": "Single image", "title": "", "caption": "", "description": "Close-up view of Snow Cover in US West, on March 1, 2012.", "items": [ { "id": 322006, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477111, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/USWest_030112_3840x2160.2387.jpg", "filename": "USWest_030112_3840x2160.2387.jpg", "media_type": "Image", "alt_text": "Close-up view of Snow Cover in US West, on March 1, 2012.", "width": 3840, "height": 2160, "pixels": 8294400 } }, { "id": 322005, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477109, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/USWest_030112_3840x2160.2387_web.png", "filename": "USWest_030112_3840x2160.2387_web.png", "media_type": "Image", "alt_text": "Close-up view of Snow Cover in US West, on March 1, 2012.", "width": 320, "height": 180, "pixels": 57600 } }, { "id": 322004, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477110, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/USWest_030112_1920x1080.2387.tif", "filename": "USWest_030112_1920x1080.2387.tif", "media_type": "Image", "alt_text": "Close-up view of Snow Cover in US West, on March 1, 2012.", "width": 1920, "height": 1080, "pixels": 2073600 } }, { "id": 322003, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 477108, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003900/a003928/USWest_030112_3840x2160.2387.tif", "filename": "USWest_030112_3840x2160.2387.tif", "media_type": "Image", "alt_text": "Close-up view of Snow Cover in US West, on March 1, 2012.", "width": 3840, "height": 2160, "pixels": 8294400 } } ], "extra_data": {} } ], "studio": "svs", "funding_sources": [ "ESE" ], "credits": [ { "role": "Animator", "people": [ { "name": "Helen-Nicole Kostis", "employer": "USRA" } ] }, { "role": "Visualizer", "people": [ { "name": "Cindy Starr", "employer": "Global Science and Technology, Inc." } ] }, { "role": "Producer", "people": [ { "name": "Rani Gran", "employer": "NASA/GSFC" } ] }, { "role": "Scientist", "people": [ { "name": "Dorothy Hall", "employer": "NASA/GSFC" }, { "name": "Jeffrey A. Miller", "employer": "Wyle Information Systems" }, { "name": "Thorsten Markus", "employer": "NASA/GSFC" } ] } ], "missions": [ "Terra" ], "series": [], "tapes": [], "papers": [], "datasets": [ { "name": "Snow Cover Daily L3 Global 0.05Deg CMG (MOD10C1)", "common_name": "", "platform": "Terra", "sensor": "MODIS", "type": "Other", "organizations": [], "description": "", "credit": "", "url": "", "date_range": "July 1, 2009 - March 11, 2012" }, { "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": null }, { "name": "Bathymetry", "common_name": "", "platform": "Terra", "sensor": "MODIS", "type": "Other", "organizations": [], "description": "", "credit": "", "url": "", "date_range": null } ], "nasa_science_categories": [ "Earth" ], "keywords": [ "Atmosphere", "Cryology", "Cryosphere", "Earth", "Earth Science", "HDTV", "Location", "MODIS", "north america", "precipitation", "Seasons", "snow", "Snow Cover", "Snow/Ice", "Terra" ], "recommended_pages": [], "related": [ { "id": 10945, "url": "https://svs.gsfc.nasa.gov/10945/", "page_type": "Produced Video", "title": "Winter, Interrupted", "description": "In 2010 and 2011, North America had two snowy winters, punctuated by monster storms that shut down cities from Denver to Washington DC. But this year saw fewer big storms, and by early March areas of the U.S. usually still dressed in white were mostly bare due to below average snowfall and above average temperatures that made this the fourth warmest winter on record. The heavy snows in 2010 were partly caused by El Niño, which drew moisture from the Pacific Ocean and Gulf of Mexico that froze above the lower 48 states upon contact with sinking cold air from the Arctic. However, La Niña conditions in 2012 resulted in the Pacific Ocean's moist air being pushed to the far North, where storms dumped near-record snowfall in Alaska. Watch the visualization below, based on data collected by NASA's Aqua and Terra satellites, to see how snow cover has varied over North America from July 2009 to March 2012. || ", "release_date": "2012-03-29T00:00:00-04:00", "update_date": "2023-05-03T13:53:10.588809-04:00", "main_image": { "id": 477121, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010900/a010945/SnowCoverNA_031112_1024x576.jpg", "filename": "SnowCoverNA_031112_1024x576.jpg", "media_type": "Image", "alt_text": "North America's mild winter has people asking, \"Where's the snow?\"", "width": 1024, "height": 576, "pixels": 589824 } } ], "sources": [], "products": [], "newer_versions": [], "older_versions": [], "alternate_versions": [] }