File:Nilas sea ice 2.jpg
From Wikimedia Commons, the free media repository
Jump to navigation
Jump to search
![File:Nilas sea ice 2.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/d/df/Nilas_sea_ice_2.jpg/800px-Nilas_sea_ice_2.jpg?20080330003549)
Size of this preview: 800 × 544 pixels. Other resolutions: 320 × 218 pixels | 640 × 435 pixels | 1,024 × 696 pixels | 1,280 × 870 pixels | 2,100 × 1,428 pixels.
Original file (2,100 × 1,428 pixels, file size: 1.86 MB, MIME type: image/jpeg)
File information
Structured data
Captions
Captions
Add a one-line explanation of what this file represents
Summary
[edit]DescriptionNilas sea ice 2.jpg |
Nilas Sea Ice sea ice w:Buffin Bay w:Arctic. In calm water, the first sea ice to form on the surface is a skim of separate crystals which initially are in the form of tiny discs, floating flat on the surface and of diameter less than 2-3 mm. Each disc has its c-axis vertical and grows outwards laterally. At a certain point such a disc shape becomes unstable, and the growing isolated crystals take on a hexagonal, stellar form, with long fragile arms stretching out over the surface. These crystals also have their c-axis vertical. The dendritic arms are very fragile, and soon break off, leaving a mixture of discs and arm fragments. With any kind of turbulence in the water, these fragments break up further into random-shaped small crystals which form a suspension of increasing density in the surface water, an ice type called frazil or grease ice. In quiet conditions the frazil crystals soon freeze together to form a continuous thin sheet of young ice; in its early stages, when it is still transparent, it is called nilas. When only a few centimetres thick this is transparent (dark nilas) but as the ice grows thicker the nilas takes on a grey and finally a white appearance. The image was taken from an w:icebreaker. |
Date | |
Source | Own work |
Author | Brocken Inaglory |
Licensing
[edit]I, the copyright holder of this work, hereby publish it under the following licenses:
![]() |
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue |
![w:en:Creative Commons](https://upload.wikimedia.org/wikipedia/commons/thumb/7/79/CC_some_rights_reserved.svg/90px-CC_some_rights_reserved.svg.png)
![attribution](https://upload.wikimedia.org/wikipedia/commons/thumb/1/11/Cc-by_new_white.svg/24px-Cc-by_new_white.svg.png)
![share alike](https://upload.wikimedia.org/wikipedia/commons/thumb/d/df/Cc-sa_white.svg/24px-Cc-sa_white.svg.png)
This file is licensed under the Creative Commons Attribution-Share Alike Attribution-Share Alike 4.0 International, 3.0 Unported, 2.5 Generic, 2.0 Generic and 1.0 Generic license.
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
You may select the license of your choice.
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 00:35, 30 March 2008 | ![]() | 2,100 × 1,428 (1.86 MB) | Mbz1 (talk | contribs) | {{Information |Description=Nilas Sea Ice [http://en.wikipedia.org/wiki/Sea_ice sea ice] w:Buffin Bay w:Arctic. In calm water, the first sea ice to form on the surface is a skim of separate crystals which initially are in the form of tiny discs, f |
You cannot overwrite this file.
File usage on Commons
The following 2 pages use this file:
File usage on other wikis
The following other wikis use this file:
- Usage on be.wikipedia.org
- Usage on en.wikipedia.org
- Usage on ru.wikipedia.org
- Usage on uk.wikipedia.org
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 | Canon |
---|---|
Camera model | Canon EOS DIGITAL REBEL XT |
Exposure time | 1/320 sec (0.003125) |
F-number | f/3.5 |
ISO speed rating | 400 |
Date and time of data generation | 06:54, 4 September 2005 |
Lens focal length | 28 mm |
Orientation | Normal |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Adobe Photoshop Elements 2.0 |
File change date and time | 17:25, 29 March 2008 |
Y and C positioning | Co-sited |
Exposure Program | Action program (biased toward fast shutter speed) |
Exif version | 2.21 |
Date and time of digitizing | 06:54, 4 September 2005 |
APEX shutter speed | 8.3219299316406 |
APEX aperture | 3.6147155761719 |
APEX exposure bias | 0 |
Metering mode | Pattern |
Flash | Flash did not fire, compulsory flash suppression |
Color space | sRGB |
Focal plane X resolution | 3,954.233409611 |
Focal plane Y resolution | 3,958.7628865979 |
Focal plane resolution unit | inches |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Scene capture type | Standard |