File:Melt Ponds, Petermann Ice Island.JPG
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Summary
[edit]DescriptionMelt Ponds, Petermann Ice Island.JPG |
English: Astronauts on the International Space Station used a digital camera to capture this view of Petermann Ice Island A, fragment 2, off of the north-east coast of Newfoundland. Spanning roughly 4 kilometres by 3.5 kilometres, the ice island is covered with melt ponds and streams, much as the surface of Greenland looks in mid-summer.
As ice melts on top of the Greenland ice sheet, the melt water forms streams and pools in the depressions on the ice surface. Drawn down-slope by gravity—much like streams on a mountainside—water also runs toward the edges of the ice. In some cases, it cracks through it and rushes to the bottom. Such processes appear to be at work on the ice island as well. |
Date | |
Source | NASA Earth Observatory |
Author | ISS Expedition 28 crew |
This image or video was catalogued by Johnson Space Center of the United States National Aeronautics and Space Administration (NASA) under Photo ID: ISS028-E-34749. This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing. Other languages:
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Image acquired with a Nikon D2Xs digital camera using a 400 mm lens, and is provided by the ISS Crew Earth Observations experiment and Image Science & Analysis Laboratory, Johnson Space Center.
Licensing
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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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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 15:08, 17 September 2011 | 4,288 × 2,848 (6.83 MB) | Originalwana (talk | contribs) | {{Information |Description ={{en|1=Astronauts on the International Space Station used a digital camera to capture this view of Petermann Ice Island A, fragment 2, off of the north-east coast of Newfoundland. Spanning roughl |
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Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | NIKON CORPORATION |
---|---|
Camera model | NIKON D2Xs |
Exposure time | 1/500 sec (0.002) |
F-number | f/6.3 |
ISO speed rating | 200 |
Date and time of data generation | 19:18, 29 August 2011 |
Lens focal length | 400 mm |
Orientation | Normal |
Horizontal resolution | 240 dpi |
Vertical resolution | 240 dpi |
Software used | GIMP 2.6.8 |
File change date and time | 15:59, 17 September 2011 |
Exposure Program | Shutter priority |
Exif version | 2.21 |
Date and time of digitizing | 19:18, 29 August 2011 |
APEX shutter speed | 8.965784 |
APEX aperture | 5.310704 |
APEX exposure bias | 0 |
Maximum land aperture | 3 APEX (f/2.83) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire |
DateTime subseconds | 16 |
DateTimeOriginal subseconds | 16 |
DateTimeDigitized subseconds | 16 |
Color space | sRGB |
Sensing method | One-chip color area sensor |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Focal length in 35 mm film | 600 mm |
Scene capture type | Standard |
Contrast | Soft |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |