Rapid coastal erosion of ice-bonded deposits on Pelly Island, southeastern Beaufort Sea, Inuvialuit Settlement Region, western Canadian Arctic

This paper quantifies rates of shoreline change and investigates the influence surficial geology on dynamics between 1950 2018 Pelly Island, located 10 km off Mackenzie Delta. Long-term changes in position were calculated using imagery analysis Analysing Moving Boundaries Using R (AMBUR). The exposure to predominant storm direction examined for northwestern southeastern zones. average annual linear regression rate (LRR) during 1950–2018 observation period was ?3.8 m·a ?1 . end point (EPR) seven periods: 1950–1972, 1972–1985, 1985–2000, 2000–2018, 2000–2013, 2013–2018, 1950–2018. A mean EPR ?5.5 ± 0.7 2000–2018 period, a maximum retreat 46.7 2.1 recorded 2013–2018 period. By comparing sections historical shorelines with differing storms, it possible draw conclusions why Island continues have highest Mackenzie–Beaufort region. Greater observed lacustrine deposits (5.3 ) compared moraine (2.7 ). In addition, from northwest found be major all periods.