File:Petermann Glacier, Greenland ESA383315.jpg

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Description
English: The Copernicus Sentinel-2A satellite takes us over the Petermann Glacier in northwest Greenland in this false-colour image captured on 16 August 2017.

Sentinel-2’s imager can view a given area in different parts of the spectrum, and producing a false-colour image help us to differentiate between targets similar in colour, such as snow and clouds. In this image, clouds are white with a hint of green, while snow and ice appear blue. Bright green areas show vegetation, while black spots are shadows and water. Petermann is one of the largest glaciers connecting the Greenland ice sheet with the Arctic Ocean. Upon reaching the sea, a number of these large outlet glaciers extend into the water with a floating ‘ice tongue’. Icebergs occasionally break or ‘calve’ off these tongues. In late July, Sentinel-2 caught a 5.5 sq km iceberg calving off the end of Petermann. Polar scientists are keeping a close watch on a new crack near the centre of the tongue – an usual place for cracks to form – while older cracks continue to grow nearby. Petermann’s ice flow has accelerated in recent years. Land-based glaciers in Greenland are a major contributor to global sea-level rise and as global temperatures warm, more ice is expected to melt into the oceans. Scientists estimate that if Petermann collapses completely the sea level would rise by about 30 cm.

This image is featured on theEarth from Space video programme.
Date
Source http://www.esa.int/spaceinimages/Images/2017/09/Petermann_Glacier_Greenland
Author European Space Agency
Permission
(Reusing this file)		 contains modified Copernicus Sentinel data (2017), processed by ESA,CC BY-SA 3.0 IGO
Title
InfoField
Petermann Glacier, Greenland
Set
InfoField
Earth observation image of the week
System
InfoField
Copernicus
Mission
InfoField
Sentinel-2
Location
InfoField
Greenland
Activity
InfoField
Observing the Earth
Keywords
InfoField
Glaciers; Satellite image

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This file is licensed under the Creative Commons Attribution-ShareAlike 3.0 IGO license.
You are free:
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  • 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.
© This image contains data from a satellite in the Copernicus Programme, such as Sentinel-1, Sentinel-2 or Sentinel-3. Attribution is required when using this image.
Attribution: Contains modified Copernicus Sentinel data {{{year}}}

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current15:55, 8 September 2017Thumbnail for version as of 15:55, 8 September 20175,400 × 5,400 (7.13 MB)Fæ (talk | contribs)European Space Agency, Id 383315, http://www.esa.int/spaceinimages/Images/2017/09/Petermann_Glacier_Greenland, User:Fæ/Project_list/ESA

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