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Summary
DescriptionCloseup of the Ice Island from Petermann Glacier - Flickr - NASA Goddard Photo and Video.jpg | NASA image acquired July 21, 2012 In July 2012, a massive ice island broke free of the Petermann Glacier in northwestern Greenland. On July 16, the giant iceberg could be seen drifting down the fjord, away from the floating ice tongue from which it calved. On July 21, 2012, the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) on NASA’s Terra satellite captured this image of the iceberg’s continuing journey. This image has been rotated and north is toward the right. ASTER combines infrared, red, and green wavelengths of light to make false-color images that help to distinguish between water and land. Water is blue, ice and snow vary in color from pale blue to white, and land areas appear brick red and brown. Clouds in the scene cast dark shadows onto the iceberg surface. Similar surface cracks appear on both the Petermann Glacier and the newly formed ice island. Nearly two years ago in July 2010, another large iceberg calved from the Petermann Glacier. That iceberg was estimated at roughly 97 square miles (251 square kilometers). The 2012 iceberg is estimated to be about half as big. This latest calving occurred farther upstream on the Petermann, but nevertheless occurred along a rift that appeared in satellite imagery in 2001. Ted Scambos of the National Snow and Ice Data Center observed melt ponds on the iceberg surface, but stated that the Petermann calving was likely associated with ocean currents rather than surface melt. NASA Earth Observatory image by Jesse Allen and Robert Simmon, using data from NASA/GSFC/METI/ERSDAC/JAROS, and U.S./Japan ASTER Science Team. Caption by Michon Scott. Instrument: Terra - ASTER Credit: NASA Earth Observatory NASA Goddard Space Flight Center enables NASA’s mission through four scientific endeavors: Earth Science, Heliophysics, Solar System Exploration, and Astrophysics. Goddard plays a leading role in NASA’s accomplishments by contributing compelling scientific knowledge to advance the Agency’s mission. Follow us on Twitter Like us on Facebook Find us on Instagram |
Date | |
Source | Closeup of the Ice Island from Petermann Glacier |
Author | NASA Goddard Space Flight Center from Greenbelt, MD, USA |
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This image was originally posted to Flickr by NASA Goddard Photo and Video at https://www.flickr.com/photos/24662369@N07/7638834528. It was reviewed on 17 August 2012 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
17 August 2012
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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Items portrayed in this file
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21 July 2012
image/jpeg
c61dc0bfae0e1acd333139742e7b94718c507c9c
2,876,540 byte
1,986 pixel
2,979 pixel
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 20:13, 17 August 2012 | 2,979 × 1,986 (2.74 MB) | Werieth | == {{int:filedesc}} == {{Information |Description=NASA image acquired July 21, 2012 In July 2012, a massive ice island broke free of the Petermann Glacier in northwestern Greenland. On July 16, the giant iceberg could be seen drifting down the fjord, ... |
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Metadata
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Image title |
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Width | 3,000 px |
Height | 2,000 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 CS4 Macintosh |
File change date and time | 17:03, 23 July 2012 |
Color space | Uncalibrated |
Image width | 2,979 px |
Image height | 1,986 px |
Date and time of digitizing | 07:48, 23 July 2012 |
Date metadata was last modified | 13:03, 23 July 2012 |
Unique ID of original document | xmp.did:B22B9026204C11689572EA738BD8F287 |