{
    "count": 16,
    "next": null,
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    "results": [
        {
            "id": 11223,
            "url": "https://svs.gsfc.nasa.gov/11223/",
            "result_type": "Produced Video",
            "release_date": "2013-05-07T10:00:00-04:00",
            "title": "Narrated Distributed Water Balance of the Nile Basin",
            "description": "This visualization shows how satellite data and NASA models are being applied to study the hydrology of the Nile basin. It is a narrated version of the original video, which can be found, along with further documentation, in entry #4044. || ",
            "hits": 21
        },
        {
            "id": 10926,
            "url": "https://svs.gsfc.nasa.gov/10926/",
            "result_type": "Produced Video",
            "release_date": "2012-03-08T12:00:00-05:00",
            "title": "Evaporation and Transpiration",
            "description": "Much of the water that soaks into the soil from irrigation or rain ultimately returns the the atmosphere as water vapor through direct evaporation from the surface or by transpiration through plant leaves as the plants use the water for growth and seed production. This loss cools the surface and plant canopy just like the evaporation of sweat cools our skin. A cool field in an arid area indicates water use by irrigation. Using the surface temperatures measured by satellites, and some additional information, water resource managers can determine the rate at which water is used in a farm field. || ",
            "hits": 353
        },
        {
            "id": 3837,
            "url": "https://svs.gsfc.nasa.gov/3837/",
            "result_type": "Visualization",
            "release_date": "2011-06-13T00:00:00-04:00",
            "title": "Components of the Water Cycle on a Flat Map for Science On a Sphere",
            "description": "Water regulates climate, predominately storing heat during the day and releasing it at night. Water in the ocean and atmosphere carry heat from the tropics to the poles. The process by which water moves around the earth, from the ocean, to the atmosphere, to the land and back to the ocean is called the water cycle. The animations below each portray a component of the water cycle. These animations of the components of the water cycle were created for the Science On a Sphere production \"Loop\" using data from the GEOS-5 atmospheric model on the cubed-sphere, run at 14-km global resolution for 25-days. Variables animated here include hourly clouds, precipitation, evaporation and water vapor. For more information on GEOS-5 see https://gmao.gsfc.nasa.gov/systems/geos5. Some of these visualizations are an orthographic view of the data used in Components of the Water Cycle. || ",
            "hits": 84
        },
        {
            "id": 3754,
            "url": "https://svs.gsfc.nasa.gov/3754/",
            "result_type": "Visualization",
            "release_date": "2009-10-09T00:00:00-04:00",
            "title": "Endless Loop: Earth's Water Cycle",
            "description": "For circulating energy, for distributing essential chemistry, and as a fundamental requirement for most biological processes, water defines Earth's dynamic identity. The more than seventy percent of our planet covered by water is in many ways the reason life has survived and thrived for so long.A simple trip to the ocean's edge highlights how water constantly moves. But water sloshing back in forth in ocean basins only begins to describe the complex processes of its circulation on Earth.NASA takes the water cycle as not merely an academic exercise but as a vital area for exploration. Satellites can examine aspects of the global water cycle that in situ measurements and observations can only dream about seeing. The TRMM spacecraft is the world's most advanced precipitation measuring system to date, gathering vital information about tropical precipitation and other features every day. Other sensors, like the AMSR and AIRS instruments on the AQUA spacecraft take profiles of the planet's atmosphere, examine water vapor concentrations and distribution, among other things. A number of instruments look at water at or below the surface. MODIS makes sea surface temperature measurements that provide essential information about how oceans work and how they're changing over time. GRACE keeps track of elusive, yet massive, quantities of water both underground and in the oceans by making precise gravitational measurements. And the planned Aquarius mission, scheduled for launch in just a few years, will make unprecedented measurements of ocean salinity, a vital characteristic for describing a wide variety of phenomena, from life to physical processes that govern global circulation patterns. || ",
            "hits": 118
        },
        {
            "id": 10509,
            "url": "https://svs.gsfc.nasa.gov/10509/",
            "result_type": "Produced Video",
            "release_date": "2009-10-09T00:00:00-04:00",
            "title": "Water, Water Everywhere!",
            "description": "Water is all around us, and its importance to nearly every natural process on earth cannot be underestimated. The water cycle is the movement of water around the Earth in all its forms, from the ocean to the atmosphere, to snow, soil, aquifers, lakes, and streams on land, and ultimately backs to the ocean. This video explains what the water cycle is and how important it is to life on earth.For complete transcript, click here. || Water_Water_Everywhere_640x480.01727_print.jpg (1024x576) [218.0 KB] || Water_Water_Everywhere_640x480_web.png (320x180) [275.8 KB] || Water_Water_Everywhere_640x480_thm.png (80x40) [18.1 KB] || Water_Water_Everywhere_AppleTV.webmhd.webm (960x540) [95.5 MB] || Water_Water_Everywhere_640x480.mp4 (1280x720) [231.3 MB] || Water_Water_Everywhere_AppleTV.m4v (960x540) [229.2 MB] || Water_Water_Everywhere_H264.mov (1280x720) [2.0 GB] || Water_Water_Everywhere_friday_1280x720.mp4 (1280x720) [231.3 MB] || Water_Water_Everywhere_friday.mov (1280x720) [6.4 GB] || Water_Water_Everywhere_ipod_640x480m4v.m4v (640x360) [72.1 MB] || Water_Water_Everywhere_friday_640x480.mp4 (640x360) [72.1 MB] || Water_Water_Everywhere_1280x720.mp4 (640x480) [97.6 MB] || Water_Water_Everywhere_friday.mp4 (320x180) [30.1 MB] || Water_Water_Everywhere_friday.wmv (320x236) [26.9 MB] || ",
            "hits": 104
        },
        {
            "id": 3644,
            "url": "https://svs.gsfc.nasa.gov/3644/",
            "result_type": "Visualization",
            "release_date": "2009-10-08T00:00:00-04:00",
            "title": "Hourly Evaporation from the GEOS-5 Model",
            "description": "This animation of the global hourly evaporation shows how heating from the sun during the day causes increased evaporation over land areas. Two versions of this animation are provided: one with a day/night clock inset and one without. The animation was created using data from the GEOS-5 atmospheric model on the cubed-sphere, run at 14-km global resolution for 30-days. For more information on the GEOS-5, see http://gmao.gsfc.nasa.gov/systems/geos5. For more information on the cubed-sphere work, see http://sivo.gsfc.nasa.gov/cubedsphere_overview.html. || ",
            "hits": 38
        },
        {
            "id": 3632,
            "url": "https://svs.gsfc.nasa.gov/3632/",
            "result_type": "Visualization",
            "release_date": "2009-09-14T00:00:00-04:00",
            "title": "Evapotranspiration from Landsat",
            "description": "Instruments on the Landsat satellites capture images in the visible spectrum, but they also take images in wavelengths invisible to the naked eye. Landsat's thermal imager captures land surface temperature data. As farmers irrigate fields, water evaporates from the soil and transpires from plants' leaves. The combined process is called evapotranspiration. Evapotranspiring water absorbs energy, so farm fields consuming more water appear cooler in the thermal band. Landsat-based evapotranspiration measurements provide an objective way for water managers to assess on a field-by-field basis how much water agricultural growers are using. The measurements have even been used to help settle water rights conflicts in court. || ",
            "hits": 68
        },
        {
            "id": 10484,
            "url": "https://svs.gsfc.nasa.gov/10484/",
            "result_type": "Produced Video",
            "release_date": "2009-09-14T00:00:00-04:00",
            "title": "Landsat: A Space Age Water Gauge",
            "description": "Agriculture consumes a great deal of water. As demand for water increases, the pressure's on to make sure every drop counts. || ",
            "hits": 53
        },
        {
            "id": 3154,
            "url": "https://svs.gsfc.nasa.gov/3154/",
            "result_type": "Visualization",
            "release_date": "2005-05-27T12:00:00-04:00",
            "title": "Urban Signatures: Evaporation (WMS)",
            "description": "Big cities influence the environment around them. For example, urban areas are typically warmer than their surroundings. Cities are strikingly visible in computer models that simulate the Earth's land surface. This visualization shows evaporation rates predicted by the Land Information System (LIS) for a day in June 2001. Evaporation is lower in the cities because water tends to run off pavement and into drains, rather than being absorbed by soil and plants from which it later evaporates. Only part of the global computation is shown, focusing on the highly urbanized northeast corridor in the United States, including the cities of Boston, New York, Philadelphia, Baltimore, and Washington. || ",
            "hits": 37
        },
        {
            "id": 20016,
            "url": "https://svs.gsfc.nasa.gov/20016/",
            "result_type": "Animation",
            "release_date": "2003-12-09T12:00:00-05:00",
            "title": "Aqua Mission Science Objectives",
            "description": "The Water Cycle  - Water falling from summer storm clouds onto a field of wheat today will someday fall again somewhere else. This is the essence of the water cycle.  The first step in the cycle is evaporation. Heated by sunlight, liquid water turns to vapor and enters the atmosphere. Another source of atmospheric water vapor is the respiratory process of plants.  Vapor leaves plants through tiny pores called stomata. This process is called transpiration. As moist air ascends into the atmosphere and encounters lower atmospheric pressure, the invisible water vapor transforms back into liquid water, and we see the next phase in the water cycle: condensation. Droplets of water coalesce from traces of vapor, and as they gain size by joining with other droplets, they yield the next part of the water cycle. This is called precipitation. The cycle is endless. As it's name suggests, the Aqua project will be intensely involved in studying the water cycle in its many forms.Evaporation - Depending on total ambient temperature, relative humidity, wind speed, and water temperature, some molecules of water are almost always passing from liquid to gaseous state at the surface. This is called evaporation. Evaporation is what puts moisture into the air, pulling water off the surface of lakes and streams and topsoil. Not only does water vapor enter the atmosphere, but also evaporating water pulls heat away from the surface. That heat will get redistributed to a different part of the atmosphere when the recently liberated water vapor re-condenses.Transpiration - Related to evaporation, this is the respiratory equivalent of breathing in plants. Transpiration is how plants lose water to the surrounding air. While some water directly evaporates through the walls of cells on the surface of plants, the majority of water lost happens through intercellular structures called stomata. These are like tiny pores. Transpiration helps pull nutrients from plant roots up to leaves. It's a natural process that's heavily influenced by ambient temperature, humidity, and other factors. Additionally, transpiration also helps properly circulate carbon dioxide and oxygen, diffusing the first into plant cells for growth, and carrying the second away from cells as waste gas.Condensation - The process that describes the change in physical state of a gas to a liquid is called condensation. Generally this is a phenomenon brought about by either of two processes: cooling of air to its dewpoint, or the addition of enough water vapor to bring the air to the point of saturation. But as that moisture either reaches high enough altitudes so that the air containing it is chilled by lower temperatures found there, or affected by increasing humidity from dynamic meteorological conditions, it condenses. The water molecules start moving more slowly, and the state of matter begins to change, as water molecules start hooking up. Gas becomes a liquid. Condensation can take many forms without necessarily falling from the sky. Dew, fog, mist, and clouds are all examples of condensed water.Precipitation - Simply speaking, precipitation is a function of water changing its material state from vapor to a liquid or a solid. But more specifically, two fundamental steps must take place for water to fall from the sky. The first is that basic precipitation components must develop. These include ice crystals that form around various minute particles in the atmosphere such as dust or salts. The second step is for those ice crystals or condensed droplets to grow. Because of their increasing size, larger droplets or ice crystals are more apt to collide with other particles of water, and thus more likely to fall or 'precipitate' out of a cloud. || ",
            "hits": 186
        },
        {
            "id": 20017,
            "url": "https://svs.gsfc.nasa.gov/20017/",
            "result_type": "Animation",
            "release_date": "2003-12-09T12:00:00-05:00",
            "title": "Aqua Mission Science Objectives",
            "description": "Water Vapor And Climate Change  - There is no more important greenhouse gas than water vapor. As one of the fundamental parts of Earth's atmosphere, water vapor affects global warming in both positive and negative terms, and offers a trail for scientists to follow towards a better understanding about how the planet functions as a whole.  It's also one of the principal aspects of the Earth's climate targeted for study by the Aqua satellite. By applying integrated analytic tools to the study of climate and climate change, experts hope to learn more specifically how water vapor and other greenhouse gasses move and function throughout the atmosphere. || ",
            "hits": 97
        },
        {
            "id": 2105,
            "url": "https://svs.gsfc.nasa.gov/2105/",
            "result_type": "Visualization",
            "release_date": "2001-04-19T12:00:00-04:00",
            "title": "Dramatic Evaporation of the Aral Sea",
            "description": "Disappearing Water: The Aral Sea Over Time (From 1973 to 2001) A time series is a powerful illustrative tool. Where in the case of Las Vegas we see the direct effects of people on the land, in the case of the Aral Sea, separating the countries of Kazakhstan and Uzbekistan, we see indirect, but no less dramatic effects on a different part of the world. The Aral Sea is actually not a sea at all. It is an immense lake, a body of fresh water, although that particular description of its contents might now be more a figure of speech than practical fact. In the last thirty years, more than sixty percent of the lake has disappeared. As you'll see in the visualization, the change over time is dramatic. In the 1970s, farmers and state offices opened significant diversions from the rivers supplying water to the lake, sending millions of gallons to irrigate cotton fields and rice paddies. So voluminous were these irrigation sluices that concentrations of salts and minerals began to rise in the shrinking body of water. That change in chemistry has led to staggering alterations in the lake's ecology, causing precipitous drops in the Aral's fish population. A secondary effect of this reduction in the Aral Sea's overall size is the rapid exposure of the lake bed. Powerful winds that blow across this part of Asia routinely pick up and deposit tens of thousands of tons of now exposed soil every year. This has not only contributed to significant reduction in breathable air quality for nearby residents, but also appreciably affected crop yields due to those heavily salt laden particles falling on arable land. In the following sequence of images, we see a series of Landsat scenes taken several years apart. As the years pass, we see the profound reduction in overall area covered by the Aral, and a commensurate increase in land area as the floor of the sea now lies exposed. || ",
            "hits": 76
        },
        {
            "id": 2117,
            "url": "https://svs.gsfc.nasa.gov/2117/",
            "result_type": "Visualization",
            "release_date": "2001-04-19T12:00:00-04:00",
            "title": "Dramatic Evaporation of the Aral Sea (With Dates)",
            "description": "Disappearing Water: The Aral Sea Over Time (From 1973 to 2001) A time series is a powerful illustrative tool. Where in the case of Las Vegas we see the direct effects of people on the land, in the case of the Aral Sea, separating the countries of Kazakhstan and Uzbekistan, we see indirect, but no less dramatic effects on a different part of the world. The Aral Sea is actually not a sea at all. It is an immense lake, a body of fresh water, although that particular description of its contents might now be more a figure of speech than practical fact. In the last thirty years, more than sixty percent of the lake has disappeared. As you'll see in the visualization, the change over time is dramatic. In the 1970s, farmers and state offices opened significant diversions from the rivers supplying water to the lake, sending millions of gallons to irrigate cotton fields and rice paddies. So voluminous were these irrigation sluices that concentrations of salts and minerals began to rise in the shrinking body of water. That change in chemistry has led to staggering alterations in the lake's ecology, causing precipitous drops in the Aral's fish population. A secondary effect of this reduction in the Aral Sea's overall size is the rapid exposure of the lake bed. Powerful winds that blow across this part of Asia routinely pick up and deposit tens of thousands of tons of now exposed soil every year. This has not only contributed to significant reduction in breathable air quality for nearby residents, but also appreciably affected crop yields due to those heavily salt laden particles falling on arable land. In the following sequence of images, we see a series of Landsat scenes taken several years apart. As the years pass, we see the profound reduction in overall area covered by the Aral, and a commensurate increase in land area as the floor of the sea now lies exposed. || ",
            "hits": 102
        },
        {
            "id": 2064,
            "url": "https://svs.gsfc.nasa.gov/2064/",
            "result_type": "Visualization",
            "release_date": "2001-02-26T12:00:00-05:00",
            "title": "Lake Chad Evaporation 1963 to 1997",
            "description": "Located on the edge of the Sahara and bordering four countries—Chad, Cameroon, Nigeria, and Niger—the immense area of this land locked lake has nearly disappeared in recent years. Persistent drought has caused the lake to drop from its former sixth place position in the list of world's largest lakes; it is now one tenth its former size.The basin of the lake is not naturally deep, so the surface area of the lake tended to spread out, keeping the total depth to little more 23 feet (7 meters). In recent years, rainfall patterns have begun to change, and tributaries to Lake Chad have not been refilling the basin as rapidly as they used to. The lush, productive flora and fauna fed by the wetlands of the shallow lake have suffered as a result.This has led to significant changes for various communities of people that live in the vicinity of the Lake. While for some the now exposed lake bed has enabled new land to be cultivated, much of the available fresh water that might have been used for irrigation is no longer dependable. As rainfall rates appear to be declining year after year, people living nearby develop even greater dependence on the lake, draining it even faster. || ",
            "hits": 77
        },
        {
            "id": 2065,
            "url": "https://svs.gsfc.nasa.gov/2065/",
            "result_type": "Visualization",
            "release_date": "2001-02-26T12:00:00-05:00",
            "title": "Lake Chad Evaporation 1973 to 1987",
            "description": "Located on the edge of the Sahara and bordering four countries—Chad, Cameroon, Nigeria, and Niger—the immense area of this land locked lake has nearly disappeared in recent years. Persistent drought has caused the lake to drop from its former sixth place position in the list of world's largest lakes; it is now one tenth its former size.The basin of the lake is not naturally deep, so the surface area of the lake tended to spread out, keeping the total depth to little more 23 feet (7 meters). In recent years, rainfall patterns have begun to change, and tributaries to Lake Chad have not been refilling the basin as rapidly as they used to. The lush, productive flora and fauna fed by the wetlands of the shallow lake have suffered as a result.This has led to significant changes for various communities of people that live in the vicinity of the Lake. While for some the now exposed lake bed has enabled new land to be cultivated, much of the available fresh water that might have been used for irrigation is no longer dependable. As rainfall rates appear to be declining year after year, people living nearby develop even greater dependence on the lake, draining it even faster. || ",
            "hits": 74
        },
        {
            "id": 2066,
            "url": "https://svs.gsfc.nasa.gov/2066/",
            "result_type": "Visualization",
            "release_date": "2001-02-26T12:00:00-05:00",
            "title": "Lake Chad 2001",
            "description": "Sweep of Lake Chad, February 2001.Located on the edge of the Sahara and bordering four countries—Chad, Cameroon, Nigeria, and Niger—the immense area of this land locked lake has nearly disappeared in recent years. Persistent drought has caused the lake to drop from its former sixth place position in the list of world's largest lakes; it is now one tenth its former size.The basin of the lake is not naturally deep, so the surface area of the lake tended to spread out, keeping the total depth to little more 23 feet (7 meters). In recent years, rainfall patterns have begun to change, and tributaries to Lake Chad have not been refilling the basin as rapidly as they used to. The lush, productive flora and fauna fed by the wetlands of the shallow lake have suffered as a result.This has led to significant changes for various communities of people that live in the vicinity of the Lake. While for some the now exposed lake bed has enabled new land to be cultivated, much of the available fresh water that might have been used for irrigation is no longer dependable. As rainfall rates appear to be declining year after year, people living nearby develop even greater dependence on the lake, draining it even faster. || ",
            "hits": 65
        }
    ]
}