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    "results": [
        {
            "id": 4735,
            "url": "https://svs.gsfc.nasa.gov/4735/",
            "result_type": "Visualization",
            "release_date": "2019-07-29T18:30:00-04:00",
            "title": "NASA Surveys Hurricane Damage to Puerto Rico's Forests (Data Viz Version)",
            "description": "Hurricane Maria transformed the lush rainforests of Puerto Rico leaving lots of openings in the forest canopy. NASA scientists studied the island's forests before and after the storm. Goddard's Lidar, Hyperspectral, and Thermal Imager (G-LiHT) is a portable instrument that maps forest health and structure from a small airplane resulting in detailed 3-D views of the forest. G-LiHT sends out 600,000 laser pulses every second mapping leaves and branches, rocks and streams. Almost 60% of the canopy trees lost branches, snapped in half, or were uprooted. Trees with wide, spreading crowns were reduced to a slender main trunk. Forests in Puerto Rico are now one-third shorter on average, after Hurricane Maria. The disturbances affected the whole ecosystem, from soils and streams to birds and frogs. G-LiHT data will help scientists understand how forests and wildlife respond to future changes. || SIGGRAPH_lidar_over_Puerto_Rico.01000_print.jpg (1024x576) [90.3 KB] || SIGGRAPH_lidar_over_Puerto_Rico.01000_searchweb.png (320x180) [89.6 KB] || SIGGRAPH_lidar_over_Puerto_Rico.01000_thm.png (80x40) [7.1 KB] || SIGGRAPH_PuertoRicoLidar.webm (1920x1080) [19.9 MB] || SIGGRAPH_lidar_over_Puerto_Rico.webm (1920x1080) [21.4 MB] || SIGGRAPH_PuertoRicoLidar.mp4 (1920x1080) [253.0 MB] || ",
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        },
        {
            "id": 4691,
            "url": "https://svs.gsfc.nasa.gov/4691/",
            "result_type": "Visualization",
            "release_date": "2019-02-11T11:00:00-05:00",
            "title": "A possible second large subglacial impact crater in northwest Greenland",
            "description": "As this visualization draws near to the northwest coast of Greenland where the Hiawatha Glacier is located, the ice sheet is cut away to show the topography of Greenland's bedrock lying beneath the ice sheet at 20x vertical exaggeration. The Hiawatha crater is clearly visible in the topography. Farther inland another, subtler circular depression can be seen. The edge picks of this depression are shown as vertical bars, while potential central peaks are marked by orange pyramids. As we rotate around the depression, the location of the best-fit circle to the edge picks appears and that circle's center is marked with an \"X\". This circle matches well with both the edge of the bedrock depression and also the residual slope of the ice surface as it flows over this depression (not shown), strongly supporting the inference that this depression is another large impact crater.This video is also available on our YouTube channel. || C2_Crater_4k.1524_print.jpg (1024x576) [111.8 KB] || C2_Crater_4k.1524_searchweb.png (320x180) [88.0 KB] || C2_Crater_4k.1524_thm.png (80x40) [7.2 KB] || C2_Crater_4k_1080p30_low.mp4 (1920x1080) [23.1 MB] || C2_Crater_4k_1080p30.mp4 (1920x1080) [47.8 MB] || C2_Crater_4k_1080p30.webmhd.webm (1080x606) [11.6 MB] || C2_Crater_4k_2160p30_low.mp4 (3840x2160) [48.2 MB] || C2_Crater_4k_2160p30.mp4 (3840x2160) [85.9 MB] || 3840x2160_16x9_30p (3840x2160) [0 Item(s)] || captions_silent.24907.en_US.srt [43 bytes] || captions_silent.24907.en_US.vtt [56 bytes] || C2_Crater_4K_YouTube.mp4 (3840x2160) [245.6 MB] || C2_Crater_4K_ProRes.mov (3840x2160) [3.4 GB] || C2_Crater_4k_1080p30_low.mp4.hwshow [190 bytes] || ",
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        },
        {
            "id": 4572,
            "url": "https://svs.gsfc.nasa.gov/4572/",
            "result_type": "Visualization",
            "release_date": "2018-11-14T14:00:00-05:00",
            "title": "The Hiawatha Impact Crater",
            "description": "The series of visualizations below are derived from satellite imagery and radar sounding. They portray both the location and size of the 31-kilometer-wide impact crater beneath Hiawatha Glacier. They also portray the structure of the glacier ice that flows into and fills the crater.The Hiawatha impact crater was first suspected to exist in the summer of 2015, from examination of a compilation of Greenland's sub-ice topography radar measurements made by NASA over two decades. The visualizations of the subsurface shown below are derived from a spring 2016 airborne survey by Germany's Alfred Wegener Institute, using a new ultrawideband radar sounder developed by the Center for Remote Sensing of Ice Sheets at The University of Kansas. Subsequent helicopter visits to the deglaciated terrain in front of Hiawatha Glacier by scientists from the Natural History Museum in Denmark recovered sediment samples from the main river that discharges water from beneath Hiawatha Glacier, through the northwestern rim breach. Laboratory examination revealed that these sediment samples contained shocked quartz and elevated platinum-group-element concentrations, both signs that the sediment records evidence of the impact of an iron asteroid more than one kilometer wide. The Hiawatha impact crater is potentially one of the youngest large impact craters on Earth.In the visualizations below, the elevation of the topography of the bed, the ice surface and the radar curtains have been exaggerated ten times in order to better illustrate their structure. || ",
            "hits": 276
        },
        {
            "id": 4627,
            "url": "https://svs.gsfc.nasa.gov/4627/",
            "result_type": "Visualization",
            "release_date": "2018-05-16T13:00:00-04:00",
            "title": "GRACE 15-Year Groundwater Trends",
            "description": "Africa, No Colorbar || africa_groundwater_no_cbar.01500_print.jpg (1024x576) [108.2 KB] || africa_groundwater_no_cbar.01500_searchweb.png (320x180) [71.6 KB] || africa_groundwater_no_cbar.01500_web.png (320x180) [71.6 KB] || africa_no_cbar (1920x1080) [0 Item(s)] || africa_groundwater_no_cbar_1080p30.mp4 (1920x1080) [21.3 MB] || africa_groundwater_no_cbar_1080p30.webm (1920x1080) [5.6 MB] || ",
            "hits": 54
        },
        {
            "id": 4588,
            "url": "https://svs.gsfc.nasa.gov/4588/",
            "result_type": "Visualization",
            "release_date": "2017-10-06T00:00:00-04:00",
            "title": "Improvements in Groundwater and Soil Moisture Measurements Derived from the GRACE Mission",
            "description": "From space, we track water in the ground – whether it is a centimeter, a meter, or a kilometer below the surface. Around the world, NASA's GRACE satellites have provided unprecedented views of water storage in natural aquifers. These underground reserves are so massive that they affect Earth's gravity field. When their mass changes, the satellites detect the change in gravity. Droughts can affect deep groundwater stores when water users pump hundreds of billions of gallons out of their aquifers to compensate for the lack of rainfall – and GRACE can detect this change.This view from space has revolutionized our understanding of water stores beneath the surface. But scientists at NASA Goddard can combine GRACE data with sophisticated computer models to give decision makers in the continental US an otherwise unseen view, helping to trigger critical water conservation measures.These computer models help us decompose the GRACE signal to identify changes in both the shallow groundwater and the root zone where crops are actually drawing moisture to survive.  Stations on the ground provide a connect-the-dots picture. The vantage point from space – combined with modeling – provides a comprehensive view of how the drought evolved over time and ultimately ended.This constantly changing snapshot of shallow groundwater conditions is now used every week in the US Drought Monitor, the benchmark relied upon by decision makers at the local, state, and federal level.This visualization shows the global Terrestrial Water Storage Anomaly from GRACE data, and then highlights the contiguous United States to show groundwater anomaly. This more detailed view is made by assimilating GRACEwater storage data into a supercomputer model of the land surface.  The visualization dives into California, showing further detail by separating out the surface soil moisture (top 2 centimeters) and the root zone soil mositure (top 100 centimeters). || ",
            "hits": 38
        },
        {
            "id": 30730,
            "url": "https://svs.gsfc.nasa.gov/30730/",
            "result_type": "Hyperwall Visual",
            "release_date": "2015-12-16T12:00:00-05:00",
            "title": "High-Resolution Soil Moisture Maps",
            "description": "These maps combine data from the twin satellites of the Gravity Recovery and Climate Experiment (GRACE) with other satellite and ground-based measurements to model the relative amount of water stored at two different levels: at plant root level and underground. The wetness, or water content, of each layer is compared to the average between 1948 and 2009. The darkest red regions represent dry conditions that should occur only 2 percent of the time (about once every 50 years). All of the maps are experimental products funded by NASA’s Applied Sciences Program and developed by scientists at NASA’s Goddard Space Flight Center and the National Drought Mitigation Center. The maps do not attempt to represent human consumption of water; but rather, they show changes in water storage related to weather, climate, and seasonal patterns. || ",
            "hits": 98
        },
        {
            "id": 30469,
            "url": "https://svs.gsfc.nasa.gov/30469/",
            "result_type": "Hyperwall Visual",
            "release_date": "2013-11-01T12:00:00-04:00",
            "title": "Landsat Data Help Water-Resource Managers",
            "description": "In the Western United States between 80 and 90% of freshwater is used for agriculture. In Southern California irrigated farmland stretches southward across the desert from the Salton Sea—an artificial inland sea—to the Mexico border. In the natural-color image [left] acquired on May 15, 2013, by Landsat 8’s Operational Land Imager, blocks of square farmland appear in shades of green and tan, while urban areas such as El Centro, California and Mexicali, Mexico appear in shades of gray. Accurate estimates of total crop area provided by Landsat satellites can be used to help forecast commodities in the United States and the world food market. On that same day, thermal measurements from Landsat 8’s Thermal Infrared Sensor [right] show different temperatures between crop fields as well as urban and desert areas. Cooler areas (e.g., irrigated crops) appear as dark purple and red shades, while warmer areas (e.g., urban and desert areas) appear as shades of bright yellow and white. Plants cool down when they transpire, so the combination of water evaporating from the plants and the ground (i.e., evapotranspiration) lowers the temperature of the irrigated land. Pixels representing cooler areas in thermal images from TIRS help water-resource managers determine where water is being used for irrigation, allowing them to make management decisions on water distribution to preserve this scarce resource. When an earlier design of Landsat 8 did not include a thermal infrared band, the Western States Water Council advocated for its inclusion.Used in 2014 Calendar. || ",
            "hits": 16
        },
        {
            "id": 30176,
            "url": "https://svs.gsfc.nasa.gov/30176/",
            "result_type": "Hyperwall Visual",
            "release_date": "2013-10-17T12:00:00-04:00",
            "title": "Subsidence in California's Central Valley",
            "description": "This animation shows, in exaggerated terms, how the surface of the southern Central Valley of California deformed from the period 2007 to 2011. Interferometric data from the Japanese ALOS PALSAR imaging radar was used to measure the deformation, shown in color overlaid on an ASTER image. The large subsidence \"bowl\" that developed over this time period was caused by withdrawal of groundwater, causing subsurface layers to compact. Interferometric synthetic aperture radar, or InSAR, can be used to monitor subsidence in order to prevent groundwater overdraft and irreversible compaction of aquifers. ALOS PALSAR data is copyright JAXA/METI and was provided by the GEO Supersites and the U.S. Government Research Consortium datapool at the Alaska Satellite Facility. || ",
            "hits": 49
        },
        {
            "id": 3623,
            "url": "https://svs.gsfc.nasa.gov/3623/",
            "result_type": "Visualization",
            "release_date": "2009-08-12T00:00:00-04:00",
            "title": "Groundwater Depletion in India Revealed by GRACE",
            "description": "Scientists using data from NASA's Gravity Recovery and Climate Experiment (GRACE) have found that the groundwater beneath Northern India has been receding by as much as one foot per year over the past decade. After examining many environmental and climate factors, the team of hydrologists led by Matt Rodell of NASA's Goddard Space Flight Center, Greenbelt, Md. concluded that the loss is almost entirely due to human consumption.Groundwater comes from the natural percolation of precipitation and other surface waters down through Earth's soil and rock, accumulating in aquifers - cavities and layers of porous rock, gravel, sand, or clay. In some subterranean reservoirs, the water may be thousands to millions of years old; in others, water levels decline and rise again naturally each year. Groundwater levels do not respond to changes in weather as rapidly as lakes, streams, and rivers do. So when groundwater is pumped for irrigation or other uses, recharge to the original levels can take months or years. More than 109 cubic km (26 cubic miles) of groundwater disappeared from the region's aquifers between 2002 and 2008 — double the capacity of India's largest surface water reservoir, the Upper Wainganga, and triple that of Lake Mead, the largest manmade reservoir in the U.S. The animation shown here depicts the change in groundwater levels as measured each November between 2002 to 2008. || ",
            "hits": 363
        }
    ]
}