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Description
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
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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

Licensing

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This file is licensed under the Creative Commons Attribution-ShareAlike 3.0 IGO license.
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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}}}

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22 July 2016

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Date/TimeThumbnailDimensionsUserComment
current11:01, 14 January 2021Thumbnail for version as of 11:01, 14 January 20213,921 × 3,257 (16.12 MB)StellarHalohigher resolution
11:17, 7 May 2017Thumbnail for version as of 11:17, 7 May 20171,920 × 1,595 (2.4 MB)European Space Agency, Id 363260, http://www.esa.int/spaceinimages/Images/2016/07/Tonga, User:Fæ/Project_list/ESA

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