Observations on permafrost coasts were included in NOAA’s 2020 Arctic Report Card for the first time in the 15 year history of the annual publication. The Coastal Permafrost Erosion essay involved contributions from 24 authors located in 8 different countries, with half of the authors being an early career researcher. Key highlights of the essay include observations documenting an increase in erosion of permafrost coasts in the Arctic since the early 2000s, coinciding with warming temperatures, sea ice reduction, and permafrost thaw. Coasts along the US and Canadian Beaufort Sea experienced the largest increase in erosion rates in the Arctic, ranging from +80 to +160%, when comparing average rates from the last two decades of the 20th century with the first two decades of the 21st century. The initiation of several national and international research networks in recent years has enabled closer coordination and collaboration of measurements and a better understanding of pan-Arctic permafrost coastal dynamics. The formation of interdisciplinary research teams and increasing collaboration across knowledge systems, such as Western science and Indigenous knowledge, has increased the scope and breadth of studies being conducted along permafrost coasts as well as their societal relevance. Combined, these developments show great promise for understanding future changes in coastal permafrost dynamics and the potential impact on both the natural and built environments.
More than 10 PerCS-Net members collaborated on a recent review paper that was published in the journal Nature Reviews Earth & Environment in January 2022 highlighting the drivers, dynamics and impacts of changing Arctic coasts. The article is one of a collection of papers on Permafrost in a warming world published in January that examine the physical, biogeochemical, and ecosystem changes related to permafrost thaw and the associated impacts.