File:Byrd Glacier, Antarctica (15473582067).jpg
![File:Byrd Glacier, Antarctica (15473582067).jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/1/17/Byrd_Glacier%2C_Antarctica_%2815473582067%29.jpg/450px-Byrd_Glacier%2C_Antarctica_%2815473582067%29.jpg?20160915215921)
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[edit]DescriptionByrd Glacier, Antarctica (15473582067).jpg |
Description Just as the Amazon, the Mississippi, the Zambezi, the Yangtze, and Earth’s other mighty rivers drain the continents, rivers also drain Antarctica, only in this frozen landscape, the rivers are ice. Under their own massive weight, the Antarctic Ice Sheets are constantly spreading out like a mound of batter on a griddle. The outer edges of the ice sheets crumble into the Southern Ocean as they spread, giving birth to icebergs. In some places, steep mountains channel the flowing ice sheet into fast-moving rivers of ice. The Byrd Glacier is one such place. Located near McMurdo Station, the principal U.S. Antarctic Research Base, the Byrd Glacier plunges through a deep, 15-mile-wide valley in the Transatlantic Mountains to create a 100-mile-long, rock-floored ice stream. This image, captured by the Landsat 7 satellite on December 24, 1999, shows part of the Byrd Glacier flowing through the Transatlantic Mountains. The glacial ice has a blue cast, and bears long stripes that echo the currents in a river. The current in this ice stream carries the glacier towards the Ross Ice Shelf at a rate of one half mile per year. Though this may seem like a snail’s pace, the Byrd Glacier is fast-flowing. It contributes more ice to the Ross Ice Shelf than any other ice stream, and the long grooves that mark its outflow are visible all the way to the edge of the Ross Ice Sheet, some 270 miles from the foot of the mountains. A century ago, this site would have been inaccessible to all but a hardy handful of intrepid explorers. Now this frigid, windy, remote continent is revealing its features not just to visiting researchers, but to anyone with access to satellite imagery. In the spring of 2007, NASA and the U.S. Geological Survey (USGS) announced the release of an unprecedented image of Antarctica: the Landsat Image Mosaic of Antarctica (LIMA). With each pixel representing 15 by 15 meters (49 by 49 feet), LIMA offers ten times greater detail than any other satellite map previously available. LIMA images are derived from observations made by Landsat 7’s Enhanced Thematic Mapper Plus sensor, such as the image above. earthobservatory.nasa.gov/IOTD/view.php?id=7544 |
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Source | Byrd Glacier, Antarctica |
Author | NASA on The Commons |
Permission (Reusing this file) |
NASA on The Commons @ Flickr Commons |
Licensing
[edit]This image was taken from Flickr's The Commons. The uploading organization may have various reasons for determining that no known copyright restrictions exist, such as: No known copyright restrictionsNo restrictionshttps://www.flickr.com/commons/usage/false
More information can be found at https://flickr.com/commons/usage/. Please add additional copyright tags to this image if more specific information about copyright status can be determined. See Commons:Licensing for more information. |
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This image was originally posted to Flickr by NASA on The Commons at https://flickr.com/photos/44494372@N05/15473582067. It was reviewed on 15 September 2016 by FlickreviewR and was confirmed to be licensed under the terms of the No known copyright restrictions. |
15 September 2016
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current | 21:59, 15 September 2016 | ![]() | 4,869 × 6,492 (3.91 MB) | Vanished Account Byeznhpyxeuztibuo (talk | contribs) | Transferred from Flickr via Flickr2Commons |
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Width | 6,000 px |
Height | 9,000 px |
Bits per component |
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Compression scheme | LZW |
Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 100 dpi |
Vertical resolution | 100 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop CS2 Macintosh |
File change date and time | 12:37, 30 March 2007 |
Color space | Uncalibrated |
Image width | 4,869 px |
Image height | 6,492 px |
Date and time of digitizing | 08:37, 30 March 2007 |
Date metadata was last modified | 08:37, 30 March 2007 |
IIM version | 2 |