File:Antarctic shelf ice hg.png
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Summary
[edit]DescriptionAntarctic shelf ice hg.png |
English: Sketch of the Antarctic coast with glaciological and oceanographic processes.
Deutsch: Schematische Darstellung glaziologischer und ozeanographischer Prozesse an der Küste der Antarktis. Über dem antarktischen Eisschild fällt Niederschlag in Form von Schnee (Precipitation). Der Eisschild (Ice sheet) ist weitgehend am Untergrund festgefroren (back stress) und hat sich bis zu einer Mächtigkeit von über 4000 m aufgebaut. Das Eis fließt nach allen Seiten vom Kontinent ab, z.T. konzentriert in Eisströmen (Ice stream). An der Küste verliert das Eis im Bereich der Aufsetzlinie (Grounding line) den Kontakt zum Untergrund, wird deutlich dünner (einige 100 m) und bildet über dem Schelf (Continental shelf) ein Schelfeis (Ice shelf) = Eis, das noch mit dem Eisschild verbunden ist, aber bereits schwimmt. Fließt das Schelfeis über eine Untiefe, entstehen Eisrücken (Ice rise). An der Schelfeiskante brechen Tafeleisberge ab (Calving line, Iceberg calving), die auf ihrem Weg um die Antarktis in wärmerem Wasser schmelzen. Eine Küstenpolynya entsteht, wenn kalte ablandige Winde (Catabatic wind) das Meereis (Sea ice) von der Küste wegtreiben. In Verbindung mit der Neueisbildung entsteht kaltes, salzreiches und damit schweres Wasser, das den Kontinentalhang (Slope) herabfließt und den wesentlichen Mechanismus für die Bildung des ozeanischen Bodenwassers in der Tiefsee (Deep sea) darstellt. |
Date | |
Source | Own work |
Author | Hannes Grobe, Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany |
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Own work, share alike, attribution required (Creative Commons CC-BY-SA-2.5) |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 22:56, 6 October 2016 | 2,834 × 1,749 (196 KB) | Cmdrjameson (talk | contribs) | Compressed with pngout. Reduced by 117kB (37% decrease). | |
23:05, 21 July 2006 | 2,834 × 1,749 (314 KB) | Hgrobe (talk | contribs) | {{Information| |Description= |Source=own work |Date=2000-04-07 |Author=~~~~ |Permission=Own work, share alike, attribution required (Creative Commons CC-BY-SA-2.5) |other_versions= }} {{self|cc-by-sa-2.5}} Category:Ice, Antarctica |
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Horizontal resolution | 28.35 dpc |
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Vertical resolution | 28.35 dpc |
Software used | |
File change date and time | 21:32, 19 July 2006 |
Structured data
some value
7 April 2000
image/png
a77445b3f68207685899706b32d0a5f61399c505
200,386 byte
1,749 pixel
2,834 pixel
Categories:
- Ice shelves of Antarctica
- Diagrams of ice shelves
- Diagrams of ice sheets
- Katabatic wind diagrams
- Katabatic wind in Antarctica
- Diagrams of the Antarctic
- Diagrams of glaciers
- Glacier mass balance diagrams
- Glaciology of Antarctica
- Glaciological diagrams of Antarctica
- Glacial geomorphology diagrams
- English-language diagrams