Arctic coast erosion revealed by drone images

phys.org | 5/23/2019 | Staff
n.king (Posted by) Level 3
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Extreme erosion of Arctic coastlines in a changing climate—up to a metre a day—has been revealed with drone surveys.

Storms in the Canadian Arctic are washing away increasing amounts of coastal permafrost—frozen ground—which is exposed when sea ice melts during the summer.

Results - Change - Region - Climate - Summer

The results highlight the ongoing change in the region, as a warming climate leads to longer summer seasons.

Sea ice melts earlier and reforms later in the year than before, exposing the coastline and presenting more opportunities for storms to cause damage.

Team - Researchers - University - Edinburgh - Cameras

An international team of researchers led by the University of Edinburgh flew drone-mounted cameras over a section of permafrost coastline on Herschel Island, also known as Qikiqtaruk, off the Yukon coast in the Canadian Arctic.

The team mapped the area seven times over 40 days in the summer of 2017.

Results - Computer - Models - Coast - Metres

Their results, from image-based computer models, showed that the coast had retreated by 14.5 metres during the period, sometimes more than a metre a day.

Comparison with surveys dating from 1952 until 2011 showed...
(Excerpt) Read more at: phys.org
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