File:Released to Public Greenland 2000 (NASA) (477860574).jpg
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DescriptionReleased to Public Greenland 2000 (NASA) (477860574).jpg |
Public Domain. Suggested credit: Jesse Allen, Earth Observatory. Image interpretation provided by Ian Joughin, University of Washington; and Ted Scambos, National Snow and Ice Data Center . For more information <a href="http://www.nasa.gov/multimedia/highlights/index.html">Visit NASA's Multimedia Gallery</a> You may wish to consult NASA's <a href="http://www.nasa.gov/audience/formedia/features/MP_Photo_Guidelines.html">image use guidelines</a>. If you plan to use an image and especially if you are considering any commercial usage, you should be aware that some restrictions may apply. ________________________ NOTE: In most cases, NASA does not assert copyright protection for its images, but proper attribution may be required. This may be to NASA or various agencies and individuals that may work on any number of projects with NASA. Please DO NOT ATTRIBUTE TO PINGNEWS. You may say found via pingnews but pingnews is neither the creator nor the owner of these materials. _________________ Additional information from source: Retreating Ice and Snow in Greenland Large images: August 30, 2006 (3.2 MB) August 26, 2003 (3.4 MB) August 29, 2000 (3.1 MB) In October 2006, a study using data from NASA’s Gravity Recovery and Climate Experiment (GRACE) satellites discussed the condition of the Greenland Ice Sheet. The study determined that, although the ice sheet had gained some mass in the interior, it had lost considerably more mass along the perimeter, particularly southeastern Greenland. Ice losses in that area ranged from 5 to 25 centimeters of water equivalent per year, due to melting and iceberg calving. The Moderate Resolution Imaging Spectroradiometer (MODIS) flying onboard NASA’s Aqua satellite provided some more detailed views of part of southeastern Greenland. Compared to the image acquired on August 29, 2000, the image acquired on August 30, 2006, shows evidence of change. Helheim Glacier, shown in the upper left of both images, is a tidewater glacier that fills a valley and flows all the way out to sea where it calves icebergs. Between 2000 and 2006, this glacier retreated a few kilometers up the valley. Although tidewater glaciers can experience cycles of advance and retreat not related to climate, some glaciologists suspect that warming ocean waters around Greenland’s perimeter have contributed to glacier retreat. Warm ocean water can melt the underside of the glacier, making it thinner and more prone to breakup. Another, subtler example of change in southeastern Greenland appears west of Helheim Glacier, up the valley from the glacier’s terminus. Compared to the 2000 image, the 2006 image shows a slightly expanded area of gray. One explanation for this is that as glaciers accelerate, the faster movement causes crevasses or cracks in the ice. These cracks can change the appearance of the ice from the perspective of a satellite, making it appear darker. Another possible explanation is snow melt. A 250-meter-resolution KMZ file of southeastern Greenland is available for use with Google Earth. NASA image by Jesse Allen, Earth Observatory. Image interpretation provided by Ian Joughin, University of Washington; and Ted Scambos, National Snow and Ice Data Center. |
Date | |
Source | Released to Public: Greenland 2000 (NASA) |
Author | pingnews.com |
Licensing edit
Public domainPublic domainfalsefalse |
This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.) | ||
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This image was originally posted to Flickr by pingnews.com at https://flickr.com/photos/39735679@N00/477860574. It was reviewed on 14 December 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the Public Domain Mark. |
14 December 2020
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 11:32, 14 December 2020 | 5,426 × 5,336 (3.01 MB) | Eyes Roger (talk | contribs) | Transferred from Flickr via #flickr2commons |
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Orientation | Normal |
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Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Adobe Photoshop CS2 Macintosh |
File change date and time | 17:21, 22 November 2006 |
Color space | sRGB |
Image width | 5,426 px |
Image height | 5,336 px |
Date and time of digitizing | 12:21, 22 November 2006 |
Date metadata was last modified | 12:21, 22 November 2006 |
IIM version | 2 |