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DescriptionChile's salt flat ESA360999.jpg |
English: The Sentinel-2A satellite takes us to the diverse landscape of the eastern Atacama desert in South America. The region pictured lies around 200km east of the Chilean city of Antofagasta on the Pacific coast (not pictured), and is virtually devoid of vegetation.
At the top of the image we can see part of Chile’s largest salt flat, the Salar de Atacama. With an average elevation of some 2300 m above sea level, it is formed by waters flowing down from the Andes, which, having no drainage outlets, are forced to evaporate, leaving salt deposits. It is the world’s largest and purest active source of lithium, containing some 30% of the world's lithium reserve base, and providing almost 30% of the world’s lithium carbonate supply. The bright turquoise rectangles and squares visible along the top part of the image are evaporation ponds. Subsurface salt brines are pumped from beneath the saline crust in two different areas. In one of them, extracted salt brines have unrivalled concentration levels of potassium and lithium. In the other, the brines obtained contain high concentrations of sulphate and boron. In the lower right part of the image we can see the Socompa stratovolcano, known for its ‘debris avalanche deposit’ where the land collapsed on its western rim some 7000 years ago. The area has since been partially filled by lava, and we can see dark lava flows around the volcano. The multispectral instrument on Sentinel-2 uses parts of the infrared spectrum to analyse mineral composition where vegetation is sporadic. In this false-colour image, the intense shades of brown and orange come from the use of an infrared part of the spectrum leading to an exaggeration of colour intensity. This image – also featured on theEarth from Space video programme– was captured by Sentinel-2A on 8 March. The satellite is the first in the twin satellite Sentinel-2 mission for Europe’s Copernicus programme, and carries a wide-swath high-resolution multispectral imager with 13 spectral bands, for a new angle on our land and vegetation. |
Date | |
Source | http://www.esa.int/spaceinimages/Images/2016/05/Chile_s_salt_flat |
Author | European Space Agency |
Permission (Reusing this file) |
Contains modified Copernicus Sentinel data [2016], processed by ESA,CC BY-SA 3.0 IGO |
Other versions |
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Title InfoField | Chile's salt flat |
Location InfoField | Chile |
Keywords InfoField | Deserts |
Set InfoField | Earth observation image of the week |
Mission InfoField | Sentinel-2 |
Activity InfoField | Observing the Earth |
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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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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 2016
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current | 17:32, 12 May 2017 | 5,000 × 5,000 (27.36 MB) | Yann | c:User:Rillke/bigChunkedUpload.js: HR from TIFF, 98% compression | |
13:03, 7 May 2017 | 1,920 × 1,920 (5.03 MB) | Fæ | European Space Agency, Id 360999, http://www.esa.int/spaceinimages/Images/2016/05/Chile_s_salt_flat, User:Fæ/Project_list/ESA |
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Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
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