File:Tonga ESA363260.jpg
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Summary
DescriptionTonga ESA363260.jpg |
English: The island of Tongatapu and the nearby smaller islands – all part of the Kingdom of Tonga archipelago in the southern Pacific Ocean – are pictured in this Sentinel-2A image from 23 May.
Tonga’s population is spread across 36 of Tonga’s 169 islands, but about 70% live on this main island. The capital, Nukuʻalofa, sits on the island’s north coast and along the Fanga’uta Lagoon. The lagoon’s mangroves provide an important breeding ground for fish and birds. Built on limestone, the island has fertile soil of volcanic ash from neighbouring volcanoes, and we can see how agricultural structures cover most of the island. Crops include root crops such as sweet potato and cassava, as well as coconuts, bananas and coffee beans. North of the island we can see many coral reefs. Although not part of its original mission objectives, scientists are experimenting with Sentinel-2 to monitor corals and detect coral bleaching – a consequence of higher water temperatures. Bleaching happens when algae living in the corals’ tissues, which capture the Sun’s energy and are essential to coral survival, are expelled owing to the higher temperature. The whitening coral may die, with subsequent effects on the reef ecosystem, and thus fisheries, regional tourism and coastal protection. The recent El Niño weather phenomenon has caused increased bleaching across the world’s corals, and scientists are finding Sentinel-2’s coverage helpful in monitoring this at reef-wide scales. This image is also featured on the Earth from Space video programme. |
Date | |
Source | http://www.esa.int/spaceinimages/Images/2016/07/Tonga |
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 | Tonga |
System InfoField | Copernicus |
Keywords InfoField | Islands; Coral Reef |
Set InfoField | Earth observation image of the week |
Mission InfoField | Sentinel-2 |
Activity InfoField | Observing the Earth |
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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 {{{year}}}
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
Items portrayed in this file
depicts
22 July 2016
image/jpeg
File history
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Date/Time | Dimensions | User | Comment | |
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current | 04:01, 14 January 2021 | 3,921 × 3,257 (16.12 MB) | StellarHalo | higher resolution |
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Metadata
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Pixel composition | RGB |
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Orientation | Normal |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Adobe Photoshop CC 2015.5 (Windows) |
File change date and time | 15:15, 6 July 2016 |
Date and time of digitizing | 14:57, 6 July 2016 |
Color space | sRGB |
Date metadata was last modified | 17:15, 6 July 2016 |
Unique ID of original document | xmp.did:b67693a6-598d-1049-b153-24666afbae2c |
IIM version | 2 |