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            "description": "As Earth warms, much of the extra heat is stored in the planet’s ocean – but monitoring the magnitude of that heat content is a difficult task. A surprising feature of the tides could help, however. Scientists at NASA’s Goddard Space Flight Center are developing a new way to use satellite observations of magnetic fields to measure heat stored in the ocean. Seawater is a good electrical conductor, and how good depends on its temperature. As saltwater sloshes around the ocean basins, its flow attempts to drag the magnetic field lines around, causing slight fluctuations. These fluctuations are relatively small, but have been detected from an increasing number of events including swell, eddies, tsunamis and tides. This is a first attempt at using magnetic satellite data to monitor ocean heat at all depths, and more work needs to be done to refine the technique to fully resolve the oceans' temperature. Watch the videos to learn more.",
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            "id": 4541,
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            "page_type": "Visualization",
            "title": "Ocean Tides and Magnetic Fields",
            "description": "Earth’s magnetic field is built up from many contributing sources ranging from the planet’s core to the magnetosphere in space. Untangling and identifying the different sources allows geomagnetic scientists to gather information about the individual processes that combine to create the full field.One contributor is the ocean. But how do the tides affect Earth’s magnetic field? Seawater is an electrical conductor, and therefore interacts with the magnetic field. As the tides cycle around the ocean basins, the ocean water essentially tries to pull the geomagnetic field lines along. Because the salty water is a good, but not great, conductor, the interaction is relatively weak. The strongest component is from the regular lunar tide that happens about twice per day (actually 12.42 hours). Other contributions come from ocean swell, eddies, and even tsunamis.The strength of the interaction also depends on the temperature of the ocean water. Scientists are now able to determine how much heat is being stored in the entire ocean, from wave top to sea floor by observations of the Earth's magnetic field. || ",
            "release_date": "2016-12-30T00:00:00-05:00",
            "update_date": "2025-01-05T23:16:17.847017-05:00",
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                "alt_text": "The animation of ocean tide displacement. ",
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            "title": "Tracking Ocean Heat With Magnetic Fields",
            "description": "As Earth warms, much of the extra heat is stored in the planet’s ocean – but monitoring the magnitude of that heat content is a difficult task. A surprising feature of the tides could help, however. Scientists at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, are developing a new way to use satellite observations of magnetic fields to measure heat stored in the ocean.Music: War Torn by Brad Smith [BMI] Complete transcript available.Watch this video on the NASA Goddard YouTube channel. || 12456-ocean-heat-AGU-web.jpg (1920x1080) [354.1 KB] || 12456-ocean-heat-AGU-web_searchweb.png (320x180) [122.0 KB] || 12456-ocean-heat-AGU-web_thm.png (80x40) [7.7 KB] || 12456-ocean-heat-APR_VX-680579_large.mp4 (1920x1080) [59.1 MB] || 12456-ocean-heat-APR_VX-680579_appletv.m4v (1280x720) [30.6 MB] || 12456-ocean-heat-AGU-720p.mp4 (1280x720) [59.5 MB] || 12456-ocean-heat-AGU.mp4 (1920x1080) [59.9 MB] || 12456-ocean-heat-APR_VX-680579.webm (960x540) [23.6 MB] || 12456-ocean-heat-APR_VX-680579_appletv_subtitles.m4v (1280x720) [30.7 MB] || 12456-ocean-heat-captions.en_US.srt [891 bytes] || 12456-ocean-heat-captions.en_US.vtt [904 bytes] || 12456-ocean-heat-APR_VX-680579_ipod_sm.mp4 (320x240) [10.9 MB] || 12456-ocean-heat-APR_VX-680579_prores.mov (1280x720) [791.2 MB] || 12456-ocean-heat-APR_VX-680579_youtube_hq.mov (1920x1080) [212.0 MB] || 12456-ocean-heat-APR_VX-680579.mpeg (1280x720) [196.6 MB] || ",
            "release_date": "2016-12-12T18:45:00-05:00",
            "update_date": "2023-05-03T13:48:05.164814-04:00",
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                "media_type": "Image",
                "alt_text": "As Earth warms, much of the extra heat is stored in the planet’s ocean – but monitoring the magnitude of that heat content is a difficult task. A surprising feature of the tides could help, however. Scientists at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, are developing a new way to use satellite observations of magnetic fields to measure heat stored in the ocean.Music: War Torn by Brad Smith [BMI] Complete transcript available.Watch this video on the NASA Goddard YouTube channel.",
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            "title": "Ocean Tides and Magnetic Fields",
            "description": "Seawater is an electrical conductor, and therefore interacts with the magnetic field.  As the tides cycle around the ocean basins, the ocean water essentially tries to pull the geomagnetic field lines along.Because the salty water is a good, but not great, conductor, the interaction is relatively weak.  Scientists at NASA Goddard Space Flight Center are developing improved methods to isolate the signal from ocean tides and use that information to determine the heat content of the ocean.Music: \"Memory Of A Lifetime\" by J Ehrlich [SESAC], Jean-Christophe Beck [BMI]Complete transcript available.Watch this video on the NASA Goddard YouTube channel. || 12450-Tidal-Magnetic-Animation-APR_large.00545_print.jpg (1024x576) [189.1 KB] || 12450-Tidal-Magnetic-Animation-APR_large.00545_searchweb.png (320x180) [93.6 KB] || 12450-Tidal-Magnetic-Animation-APR_large.00545_thm.png (80x40) [5.8 KB] || 12450-Tidal-Magnetic-Animation-APR.webm (960x540) [26.5 MB] || 12450-Tidal-Magnetic-Animation-APR_prores.mov (1280x720) [989.0 MB] || 12450-Tidal-Magnetic-Animation-APR_large.mp4 (1920x1080) [66.1 MB] || 12450-Tidal-Magnetic-Animation-APR_youtube_hq.mov (1920x1080) [1.0 GB] || 12450-Tidal-Magnetic-Animation-APR_appletv.m4v (1280x720) [32.1 MB] || 12450-Tidal-Magnetic-Animation-APR_appletv_subtitles.m4v (1280x720) [32.2 MB] || 1920x1080_16x9_30p (1920x1080) [128.0 KB] || 12450-Tidal-Magnetic-Animation.en_US.srt [1.4 KB] || 12450-Tidal-Magnetic-Animation.en_US.vtt [1.4 KB] || 12450-Tidal-Magnetic-Animation-APR_ipod_sm.mp4 (320x240) [11.5 MB] || ",
            "release_date": "2016-12-12T18:30:00-05:00",
            "update_date": "2023-05-03T13:48:05.290238-04:00",
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                "filename": "12450-Tidal-Magnetic-Animation-APR_large.00545_print.jpg",
                "media_type": "Image",
                "alt_text": "Seawater is an electrical conductor, and therefore interacts with the magnetic field.  As the tides cycle around the ocean basins, the ocean water essentially tries to pull the geomagnetic field lines along.Because the salty water is a good, but not great, conductor, the interaction is relatively weak.  Scientists at NASA Goddard Space Flight Center are developing improved methods to isolate the signal from ocean tides and use that information to determine the heat content of the ocean.Music: \"Memory Of A Lifetime\" by J Ehrlich [SESAC], Jean-Christophe Beck [BMI]Complete transcript available.Watch this video on the NASA Goddard YouTube channel.",
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