File:Kangerlussuaq Glacier, Greenland ESA23893037.tiff
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Summary[edit]
DescriptionKangerlussuaq Glacier, Greenland ESA23893037.tiff |
English: The Kangerlussuaq Glacier, one of Greenland’s largest tidewater outlet glaciers, is pictured in this false-colour image captured by the Copernicus Sentinel-1 mission. Meaning ‘large fjord’ in Greenlandic, the Kangerlussuaq Glacier flows into the head of the Kangerlussuaq Fjord, the second largest fjord in east Greenland. Zoom in to see this image at its full resolution or click on the circles to learn more about the features in it. Each Sentinel-1 satellite carries an advanced radar instrument giving us a day-and-night supply of images of Earth’s surface. Remote sensing allows us to monitor ice sheets across the globe and keep track of all calving stages – from rift detection to iceberg breakaway – as well as measure ice cover and drifting icebergs. This Sentinel-1 radar image combines three separate acquisitions during the summer of 2021 and shows visible changes on the ground and sea surface between three acquisition dates: 4 June, 16 June and 28 June. The array of colours represents the seasonal retreat of ice during this time. At the top of the image, stable ice can be seen in white and is present in all three radar acquisitions. Ice and snow visible only in the early-summer acquisitions can be seen in bright yellow and are not present in the last acquisition as they have melted by this time. The different shades of red highlights ice and snow detected only in the first acquisition captured on 4 June. Colours on the sea surface vary owing to surface currents and sea ice dynamics. Research using satellite imagery suggests that since 2017, Kangerlussuaq has entered a new phase of rapid retreat and acceleration, and its ice front is now at its most retreated position since the early 20th century. As global temperatures increase, the melting of the massive ice sheets that blanket Greenland has significantly accelerated, contributing to sea-level rise. Over the past decade alone, findings have revealed that 3.5 trillion tonnes of ice have melted from the Greenland ice sheet and spilled into the ocean – enough to cover the UK with meltwater 15 m deep. Using data from ESA’s CryoSat mission, the research shows that extreme ice melting events in Greenland have become more frequent and more intense over the past 40 years, raising sea levels and the risk of flooding worldwide. Raised sea levels heighten the risk of flooding for coastal communities worldwide and disrupt Arctic Ocean marine ecosystems, as well as altering patterns of ocean and atmospheric circulation – which affect weather conditions around the planet. Observations of Greenland runoff from space can be used to verify how climate models simulate ice sheet melting which will allow improved predictions of how much Greenland will raise the global sea level in the future. This image is also featured on the Earth from Space video programme. |
Date | 14 January 2022 (upload date) |
Source | Kangerlussuaq Glacier, Greenland |
Author | European Space Agency |
Other versions |
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Activity InfoField | Observing the Earth |
Mission InfoField | Sentinel-1 |
Set InfoField | Earth observation image of the week |
System InfoField | Copernicus |
Licensing[edit]
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 2021
Attribution
The use of Copernicus Sentinel Data is regulated under EU law (Commission Delegated Regulation (EU) No 1159/2013 and Regulation (EU) No 377/2014). Relevant excerpts:
Free access shall be given to GMES dedicated data [...] made available through GMES dissemination platforms [...].
Access to GMES dedicated data [...] shall be given for the purpose of the following use in so far as it is lawful:
GMES dedicated data [...] may be used worldwide without limitations in time.
GMES dedicated data and GMES service information are provided to users without any express or implied warranty, including as regards quality and suitability for any purpose. |
Attribution
This media was created by the European Space Agency (ESA).
Where expressly so stated, images or videos are covered by the Creative Commons Attribution-ShareAlike 3.0 IGO (CC BY-SA 3.0 IGO) licence, ESA being an Intergovernmental Organisation (IGO), as defined by the CC BY-SA 3.0 IGO licence. The user is allowed under the terms and conditions of the CC BY-SA 3.0 IGO license to Reproduce, Distribute and Publicly Perform the ESA images and videos released under CC BY-SA 3.0 IGO licence and the Adaptations thereof, without further explicit permission being necessary, for as long as the user complies with the conditions and restrictions set forth in the CC BY-SA 3.0 IGO licence, these including that:
See the ESA Creative Commons copyright notice for complete information, and this article for additional details.
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This file is licensed under the Creative Commons Attribution-ShareAlike 3.0 IGO license. Attribution: ESA, CC BY-SA IGO 3.0
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 10:04, 14 January 2022 | 10,004 × 7,809 (223.53 MB) | OptimusPrimeBot (talk | contribs) | #Spacemedia - Upload of https://esamultimedia.esa.int/img/2022/01/Kangerdlugssuaq_Sentinel-1_multitemporal_04June-16June-28June_Stack_RGB_MM.tif via Commons:Spacemedia |
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Width | 10,004 px |
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Height | 7,809 px |
Bits per component |
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Compression scheme | Uncompressed |
Pixel composition | RGB |
Image data location | 26,416 |
Orientation | Normal |
Number of components | 3 |
Number of rows per strip | 7,809 |
Bytes per compressed strip | 234,363,708 |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop 22.5 (Windows) |
File change date and time | 10:18, 23 September 2021 |
Color space | Uncalibrated |