File:Mackenzie Delta Ice-Wedge Tuktoyaktuk Pingo (4).jpg
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Captions
Captions
Mackenzie delta with lakes and channels. The large East Channel has deposited during the flood period a “reversed delta” in one of the lakes.
Summary[edit]
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| Description |
Deutsch: Blick über das Mackenziedelta mit seinen zahlreichen Seen und Flussarmen. Der East Channel zieht diagonal über das Bild. Im Vordergrund hat sich während der Hochwasserperiode ein “reversed delta” in einen See abgelagert. Aufnahme: Lorenz King, JLU Giessen.de, 12. August 1987
English: View over the Mackenzie delta with its numerous lakes and channels. The larger East Channel crosses the picture diagonally. During the flood period, this main channel deposited its sediments in one of the lakes thus creating a “reversed delta”. Photo: Lorenz King, JLU_Giessen.de, August 12,1987
Français : Le delta du Mackenzie, dans les territoires du Nord-Ouest du Canada. Il constitue l'embouchure du fleuve Mackenzie dans l'océan Arctique ; il est situé à environ 120 mk à l'ouest de la ville d'Inuvik. Il se déploie en un labyrinthe de sédiments, de lacs et chenaux sinueux, évoluant au gré des crues saisonnières, alimenté par la fonte des glaciers. On distingue le chenal Est, qui apporte de grandes quantités de sédiments, formant un « delta inversé » à l'intérieur de l'un des lacs. Site du patrimoine mondial de l'UNESCO. "Depuis les w:fr:Années 1980années 1980, le pergélisol peu profond se réchauffe de 0,3 à 0,6 °C par décennie dans le centre et le nord de la région du Mackenzie", contribuant à une hausse importante des rejets de CH4 et de CO2 dans les chenaux du Delta (source : Jolie A.L & al. (2020) Ice-out and freshet fluxes of CO2 and CH4 across the air–water interface of the channel network of a great Arctic delta, the Mackenzie ; Polar Research, vol 39, n° 0 ; 2020-06-26 ; issn=0800-0395 ; issn2=1751-8369 ; doi=10.33265/polar.v39.3528 ; lire en ligne=https://polarresearch.net/index.php/polar/article/view/3528 |
| Date | |
| Source | Own work |
| Author | Matti&Keti |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 13:03, 18 July 2020 | | 3,184 × 2,151 (1.86 MB) | Matti&Keti (talk | contribs) | Uploaded own work with UploadWizard |
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