File:20070801 forest.jpg
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20070801_forest.jpg (538 × 268 pixels, file size: 199 KB, MIME type: image/jpeg)
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Description20070801 forest.jpg |
English: Larix gmelinii forest. This is what the Siberians call a "drunken forest". Permafrost that has not melted provides a solid foundation that holds trees upright. When permafrost melts, as it has here, the layer of loose soil deepens and trees lose their foundations, tipping over at odd angles. Kochechum River, Evenkiyskiy Avtonomnyy Okrug, Russia; 66°20'N 99°00'E.
As we traveled down river, I saw what the Siberians call a "drunken forest". This area is permafrost, where the soil stays firmly frozen year round. Larch grows well here, but their roots are shallow. When permafrost melts, the trees lose their footing and tilt to the side. I guess the trees look like a drunk trying to walk home, tilted at crazy angles. It is a curious sight, but it is also a clear sign that the temperature in that spot has been warm enough to melt the permafrost. -- Weblog of Dr. Jon Ranson in Siberia. Français : La décongélation du permafrost provoque des phénomènes thermokarstiques (ici des trous et effondrements locaux, et ailleurs des ravine et parfois des ravins), au fur et à mesure que les arbres poussent, ce qui peut donner un aspect de "forêt îvre" à la taïga (ici en Sibérie) |
Date | |
Source | NASA Science blog |
Author | Jon Ranson, NASA Science blog |
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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 | 12:11, 14 June 2009 | 538 × 268 (199 KB) | MPF (talk | contribs) | Crop black border | |
20:42, 27 February 2009 | 540 × 270 (54 KB) | File Upload Bot (Magnus Manske) (talk | contribs) | {{BotMoveToCommons|en.wikipedia|year={{subst:CURRENTYEAR}}|month={{subst:CURRENTMONTHNAME}}|day={{subst:CURRENTDAY}}}} {{Information |Description={{en|This is what the Siberians call a âdrunken forest.â Permafrost that has not melted provides a |
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Orientation | Normal |
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Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Adobe Photoshop Elements 5.0 (20060914.r.77) Windows |
File change date and time | 13:11, 14 June 2009 |
Color space | sRGB |
Image width | 538 px |
Image height | 268 px |
Date and time of digitizing | 11:25, 4 June 2009 |
Date metadata was last modified | 14:11, 14 June 2009 |