File:Earth from Space- Okavango Delta, Botswana ESA24753585.jpg
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Summary
[edit]DescriptionEarth from Space- Okavango Delta, Botswana ESA24753585.jpg |
English: Botswana’s Okavango Delta – the world’s largest inland delta – is featured in this multitemporal radar image, captured by the Copernicus Sentinel-1 mission. Zoom in to explore this image at its full resolution or click on the circles to learn more about the features in it. The delta is fed by the Okavango River, which is often referred to as ‘the river that never reaches the sea’. This is because, unlike most rivers, its direction of flow is inland. Instead of flowing towards the sea, the Okavango River irrigates the Kalahari Desert. The Okavango Delta is a labyrinth of lagoons, swamps, channels and islands. It is a UNESCO World Heritage Site and part of the Ramsar wetland network. Wetlands are the most biologically diverse ecosystems on Earth, even more productive than tropical rainforests. Wetlands can be difficult to access, but satellite observations from space can provide information on types of vegetation and water bodies, and how they change over time. Images acquired by satellites carrying radar instruments, such as Sentinel-1 are particularly useful, as they can be used to differentiate between dry and waterlogged surfaces, and show how wetlands change with the seasons. This composite combines three Copernicus Sentinel-1 radar images, acquired over eight months in 2021. Each acquisition has been given a different colour – red for January, green for April and blue for August – to show how the land and water changed between acquisitions. The shades of pink and blue in the lower part of the delta depict the seasonal changes in vegetation occurring along the waterways. The same goes for the Mababe depression, visible on the right side of the delta as an area with the same colouring. In the bottom left of the image, Lake Ngami appears in dark colours, as its calm waters reflect the radar signal in all of the acquisitions. The green tones around it mean that the area around the lake is subject to seasonal flooding. |
Date | 17 March 2023 (upload date) |
Source | Earth from Space: Okavango Delta, Botswana |
Author | European Space Agency |
Other versions |
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Activity InfoField | Observing the Earth |
Mission InfoField | Sentinel-1 |
Set InfoField | Earth from Space image collection |
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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current | 17:46, 17 March 2023 | 4,373 × 5,830 (34.52 MB) | OptimusPrimeBot (talk | contribs) | #Spacemedia - Upload of https://www.esa.int/var/esa/storage/images/esa_multimedia/images/2023/03/earth_from_space_okavango_delta_botswana/24753575-2-eng-GB/Earth_from_Space_Okavango_Delta_Botswana.jpg via Commons:Spacemedia |
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