Rocky coasts evolution on the Brøgger peninsula (Spitsbergen): control and variability
Résumé
The aim of this study is to identify and quantify the controlling factors of rocky coasts evolution on the north shore
of the Brøgger peninsula, northwest Spitsbergen, from the Kvadehuken spit to the foot of the Haavimfjellet (fig. 1), in a
context of climate change (Artic warming) and geomorphological transition (from glacial and periglacial to paraglacial
and paraperiglacial systems). The study areas have been study using several methodologies. Aerial photographs from
1990 to 2010 have been used to quantify the evolution of top of the cliff and reveal a total loss area of -9752 m² with a
retreat rate of -0,06 m/y. Schmidt hammer has been used to study the resistance variability on cliff faces and shows a
lower resistance in the top of the cliff face on most studied sites. Evolution of the cliff face has been studied using
photogrammetry from 2016 to 2017 and a thermal camera has been used to highlight facies variability and areas of
weakness.