{ "id": 3948, "url": "https://svs.gsfc.nasa.gov/3948/", "page_type": "Visualization", "title": "Circulation of Ocean Currents Around the Western Antarctic Ice Shelves", "description": "This animation shows the circulation of ocean currents around the western Antarctic ice shelves. The shelves are indicated by the rainbow color; red is thicker (>550m), while blue is thinner (<200m). The ocean flow runs from the surface to 900 m, colored white at the surface and fading to light blue at depth, and is based on the ECCO2 model over a representative two-month period. Bathymetry, topography, and ice thickness were derived from the RTopo-1 dataset of Timmermann, et al. (http://doi.pangaea.de/10.1594/PANGAEA.741917). 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As these twisting flows meander around the continent's frozen edges and beneath the underside of floating ice shelves, they're slowly melting the ice from below. Using surface elevation measurements collected during NASA's ICESat mission, scientists have found that this melting is driving most of Antarctica's recent ice losses—particularly in West Antarctica, where inland glaciers that feed into the ice shelves are draining ice into the ocean at an accelerated rate. The visualization below shows the interaction of modeled ocean currents and Antarctic ice shelves, where red areas represent ice thicker than about 1,800 feet and blue areas represent ice thinner than about 650 feet. Notice how the ice shelves generally become thinner—a rainbow of colors indicates intermediate thicknesses—as they extend farther from land. || ", "release_date": "2012-05-03T00:00:00-04:00", "update_date": "2023-05-03T13:53:05.566094-04:00", "main_image": { "id": 476382, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010900/a010970/CurrentsOfChange_CoverImage_1024x576.jpg", "filename": "CurrentsOfChange_CoverImage_1024x576.jpg", "media_type": "Image", "alt_text": "When it comes to ice in Antarctica, out of sight is not out of mind.", "width": 1024, "height": 576, "pixels": 589824 } } ], "sources": [], "products": [], "newer_versions": [], "older_versions": [], "alternate_versions": [] }