{ "count": 11, "next": null, "previous": null, "results": [ { "id": 13871, "url": "https://svs.gsfc.nasa.gov/13871/", "result_type": "Produced Video", "release_date": "2021-06-09T13:30:00-04:00", "title": "NASA Finds Local Lockdowns Brought Global Ozone Reductions", "description": "This video can be freely shared and downloaded. While the video in its entirety can be shared without permission, some individual imagery is provided by pond5.com and is obtained through permission and may not be excised or remixed in other products. Specific details on stock footage may be found here. For more information on NASA’s media guidelines, visit https://www.nasa.gov/multimedia/guidelines/index.html.Music Credit:Universal Production Music: Waiting For Results - Adam John Salkeld [PRS], Neil Pollard [PRS]Complete transcript available. || 13871_Still_Image.jpg (1920x1080) [626.3 KB] || 13871_Still_Image_searchweb.png (320x180) [77.2 KB] || 13871_Still_Image_thm.png (80x40) [7.0 KB] || 13871_COVIDNOx.mov (1920x1080) [1.9 GB] || 13871_COVIDNOx.mp4 (1920x1080) [199.0 MB] || 13871_COVIDNOx.webm (1920x1080) [15.2 MB] || COVIDNOX.en_US.srt [2.1 KB] || COVIDNOX.en_US.vtt [2.1 KB] || ", "hits": 32 }, { "id": 13243, "url": "https://svs.gsfc.nasa.gov/13243/", "result_type": "Produced Video", "release_date": "2019-06-26T11:00:00-04:00", "title": "NASA Tracks the Future of Asia's Glaciers", "description": "Asia’s high mountains are a crucial freshwater source to one-seventh of the world’s population. Snow and glaciers in these mountains contain the largest volume of freshwater outside of Earth's polar ice sheets, leading hydrologists to nickname this region the Third Pole. Rapid changes in the region's climate are affecting glacier flows and snowmelt. Local people are already modifying their land-use practices in response to the changing supply, and the region's ecology is transforming. Scientists estimate that by 2100, these glaciers could be up to 75% smaller in volume. NASA's satellites observe and measure snow and ice cover remotely with multiple types of sensors. This allows scientists to create an authoritative estimate of the water budget of this region and a set of products local policy makers can use in responding to hazards and planning for a changing water supply. || ", "hits": 35 }, { "id": 13092, "url": "https://svs.gsfc.nasa.gov/13092/", "result_type": "Produced Video", "release_date": "2019-03-25T12:00:00-04:00", "title": "Greenland's Jakobshavn Glacier Reacts to Changing Ocean Temperatures", "description": "NASA's Oceans Melting Greenland (OMG) mission uses ships and planes to measure how ocean temperatures affect Greenland's vast icy expanses. Jakobshavn Glacier, known in Greenlandic as Sermeq Kujalle, on Greenland's central western side, has been one of the island's largest contributor's to sea level rise, losing mass at an accelerating rate. In a new study, the OMG team found that between 2016 and 2017, Jakobshavn Glacier grew slightly and the rate of mass loss slowed down. They traced the causes of this thickening to a temporary cooling of ocean temperatures in the region. || ", "hits": 38 }, { "id": 13089, "url": "https://svs.gsfc.nasa.gov/13089/", "result_type": "Produced Video", "release_date": "2018-10-11T13:15:00-04:00", "title": "Arctic Sea Ice Cover Is the Thinnest and Youngest It's Been in 60 Years", "description": "Music: Galore by Lee Groves [PRS], Peter George Marett [PRS]Complete transcript available. || YOUTUBE_1080_13089_SeaIceThinning_youtube_1080.00001_print.jpg (1024x576) [237.9 KB] || YOUTUBE_1080_13089_SeaIceThinning_youtube_1080.00001_searchweb.png (320x180) [136.4 KB] || YOUTUBE_1080_13089_SeaIceThinning_youtube_1080.00001_thm.png (80x40) [7.6 KB] || YOUTUBE_720_13089_SeaIceThinning_youtube_720.mp4 (1280x720) [139.9 MB] || YOUTUBE_1080_13089_SeaIceThinning_youtube_1080.mp4 (1920x1080) [138.5 MB] || 13089_SeaIceThinning.webm (960x540) [34.4 MB] || TWITTER_720_13089_SeaIceThinning_twitter_720.mp4 (1280x720) [16.9 MB] || FACEBOOK_720_13089_SeaIceThinning_facebook_720.mp4 (1280x720) [101.9 MB] || 13089_SeaIceThinning.mov (1920x1080) [2.4 GB] || 13089_SeaIceThinning.en_US.srt [1.4 KB] || 13089_SeaIceThinning.en_US.vtt [1.4 KB] || ", "hits": 45 }, { "id": 4683, "url": "https://svs.gsfc.nasa.gov/4683/", "result_type": "Visualization", "release_date": "2018-10-10T00:00:00-04:00", "title": "NASA Scientists see Gravity Waves in Concentric Rings", "description": "NASA scientists have tracked gravity waves traveling thousands of miles across our atmosphere in concentric rings. Large storms can create these waves, which grow and spread upward hundreds of miles above Earth's surface. The AIRS instrument on NASA's Aqua satellite detected gravity waves in the troposphere and stratosphere 12 hours before a deadly EF5 tornado in Moore, Oklahoma, in 2013. On the instrument's next pass 11 hours later, it detected even stronger waves.We pull up 250 miles to the ionosphere, where the waves can be observed by GPS satellites. Here gravity waves are shown in greens and yellows, like ripples in a pond. The waves and tornado were both produced by a long-lived storm system.Understanding the spread of gravity waves improves global weather forecasting and space weather forecasting.Complete transcript available.This video is also available on our YouTube channel. || GravityWavesBeforeAfterMooreTornado_0740_print.jpg (1024x576) [131.1 KB] || GravityWavesBeforeAfterMooreTornado_0740_searchweb.png (320x180) [102.9 KB] || GravityWavesBeforeAfterMooreTornado_0740_thm.png (80x40) [8.3 KB] || GravityWavesBeforeAfterMooreTornado_0740.tif (1920x1080) [3.2 MB] || GravityWavesMooreOK-SameWordsDifferentOrder.webm (1920x1080) [7.4 MB] || GWfacebook-AIRS-TEC-GOES-4k-audio.mp4 (1920x1080) [76.1 MB] || GravityWavesMooreOK-SameWordsDifferentOrder.mp4 (1920x1080) [117.1 MB] || composite (3849x2160) [0 Item(s)] || GW4k-AIRS-TEC-GOES-4k-audio-youtube.en_US.srt [1.2 KB] || GW4k-AIRS-TEC-GOES-4k-audio-youtube.en_US.vtt [1.2 KB] || GW4k-AIRS-TEC-GOES-4k-audio-youtube.mp4 (3840x2160) [240.0 MB] || GWfacebook-AIRS-TEC-GOES-4k-audio.mp4.hwshow [199 bytes] || ", "hits": 109 }, { "id": 12908, "url": "https://svs.gsfc.nasa.gov/12908/", "result_type": "Produced Video", "release_date": "2018-03-29T11:00:00-04:00", "title": "Scientists Create First-Ever 3D Model of a Melting Snowflake", "description": "This visualization is based on the first three-dimensional numerical model of melting snowflakes in the atmosphere, developed by scientist Jussi Leinonen of NASA's Jet Propulsion Laboratory in Pasadena, California. A better understanding of how snow melts can help scientists recognize the signature in radar signals of heavier, wetter snow -- the kind that breaks power lines and tree limbs -- and could be a step toward improving predictions of this hazard.The model reproduces key features of melting snowflakes that have been observed in nature: first, meltwater gathers in any concave regions of the snowflake's surface. These liquid-water regions merge as they grow and eventually form a shell of liquid around an ice core, finally developing into a water drop. The visualization shows a typical snowflake less than half an inch (one centimeter) long. The snowflake is composed of individual ice crystals whose arms became entangled when they collided in the air. The extremities of the arms melt first because they are more exposed to heat from the surrounding air. Water first fills small cavities within the ice crystals, and then these overflow, allowing water to pool into droplets.\"I got interested in modeling melting snow because of the way it affects our observations with remote sensing instruments,\" Leinonen said. A radar \"profile\" of the atmosphere from top to bottom shows a very bright, prominent layer at the altitude where falling snow and hail melt, much brighter than the layers above and below. \"The reasons for this layer are still not particularly clear, and there has been a bit of debate in the community,\" Leinonen explained. Simpler models can reproduce the bright melt layer, but a more detailed model like this one can help scientists to understand it better, particularly how the type of melting snow and the radar wavelengths used to observe it relate to the brightness of the layer.A paper on the numerical model, titled \"Snowflake melting simulation using smoothed particle hydrodynamics,\" recently appeared in the Journal of Geophysical Research - Atmospheres. || ", "hits": 33 }, { "id": 4629, "url": "https://svs.gsfc.nasa.gov/4629/", "result_type": "Visualization", "release_date": "2018-03-29T00:00:00-04:00", "title": "Snowflakes Melting Simulation Over Turntable", "description": "Clockwise rotating turntable of a cluster of melting snowflakes. || turntable_v39.0000_print.jpg (1024x576) [69.2 KB] || turntable_v39.0000_searchweb.png (320x180) [34.1 KB] || turntable_v39.0000_thm.png (80x40) [3.4 KB] || turntable_v39_1080p30.mp4 (1920x1080) [13.2 MB] || 1920x1080_16x9_30p (1920x1080) [0 Item(s)] || turntable_v39_1080p30.webm (1920x1080) [2.7 MB] || turntable_v39_1080p30.mp4.hwshow [187 bytes] || ", "hits": 24 }, { "id": 4630, "url": "https://svs.gsfc.nasa.gov/4630/", "result_type": "Visualization", "release_date": "2018-03-29T00:00:00-04:00", "title": "Falling Snowflakes Melting Simulation", "description": "Simulation of a melting snowflakes tumbling. || falling_flake.0000_print.jpg (1024x576) [54.2 KB] || falling_flake.0000_searchweb.png (320x180) [25.3 KB] || falling_flake.0000_thm.png (80x40) [2.6 KB] || falling_flake.0.mp4 (1920x1080) [12.3 MB] || 1920x1080_16x9_60p (1920x1080) [0 Item(s)] || falling_flake.0.webm (1920x1080) [2.7 MB] || falling_flake.0.mp4.hwshow [202 bytes] || ", "hits": 33 }, { "id": 11501, "url": "https://svs.gsfc.nasa.gov/11501/", "result_type": "Produced Video", "release_date": "2014-06-13T00:00:00-04:00", "title": "Hadley Cell Circulation", "description": "11501_Present_youtube_hq_print.jpg (1024x576) [57.7 KB] || 11501_Present_youtube_hq_web.png (320x180) [52.3 KB] || 11501_Present_youtube_hq_thm.png (80x40) [4.0 KB] || 11501_Present-1920_prores.mov (1920x1080) [654.4 MB] || 11501_Present_prores.mov (1280x720) [346.8 MB] || 11501_Present_youtube_hq.mov (1920x1080) [5.1 MB] || 11501_Present_1280x720.wmv (1280x720) [2.6 MB] || 11501_Present_appletv.m4v (960x540) [6.4 MB] || 11501_Present_1920_Frames (1920x1080) [128.0 KB] || 11501_Present_720x480.webmhd.webm (960x540) [815.6 KB] || 11501_Present_ipod_lg.m4v (640x360) [3.2 MB] || 11501_Present_nasaportal.mov (640x360) [3.9 MB] || 11501_Present_720x480.wmv (720x480) [1.4 MB] || 11501_Present_ipod_sm.mp4 (320x240) [1.1 MB] || ", "hits": 58 }, { "id": 11540, "url": "https://svs.gsfc.nasa.gov/11540/", "result_type": "Produced Video", "release_date": "2014-06-03T00:00:00-04:00", "title": "Unstoppable", "description": "Most glaciers in West Antarctica sit on a bed that is below sea level. The massive ice sheet’s exposure to ocean water makes it inherently unstable, a fact that scientists have warned about for decades. In recent years, scientists have observed the glaciers that flow into West Antarctica's Amundsen Sea are shedding ice at a faster rate. Now, new research shows there is nothing to stop these glaciers from being lost to the ocean—an event that will likely take centuries to unfold, but raise global sea level by four feet. Watch the video to learn more. || ", "hits": 20 }, { "id": 4168, "url": "https://svs.gsfc.nasa.gov/4168/", "result_type": "Visualization", "release_date": "2014-05-29T12:00:00-04:00", "title": "West Antarctic Collapse", "description": "A new study by researchers at NASA and the University of California, Irvine, finds a rapidly melting section of the West Antarctic Ice Sheet appears to be in an irreversible state of decline, with nothing to stop the glaciers in this area from melting into the sea according to glaciologist and lead author Eric Rignot, of UC Irvine and NASA's Jet Propulsion Laboratory in Pasadena, California.Three major lines of evidence point to the glaciers' eventual demise: the changes in their flow speeds, how much of each glacier floats on seawater, and the slope and depth of the terrain they are flowing over. In a paper in April, Rignot's research group discussed the steadily increasing flow speeds of these glaciers over the past 40 years. This new study examines the other two lines of evidence.As glaciers flow out from land to the ocean, large expanses of ice behind their leading edges float on the seawater. The point on a glacier where it first loses contact with land is called the grounding line. Nearly all glacier melt occurs on the underside of the glacier beyond the grounding line, on the section floating on seawater. The Antarctic glaciers studied have thinned so much they are now floating above places where they used to sit solidly on land, which means their grounding lines are retreating inland.—>