TY - JOUR A1 - Nielsen, David Marcolino A1 - Dobrynin, Mikhail A1 - Baehr, Johanna A1 - Razumov, Sergey A1 - Grigoriev, Mikhail T1 - Coastal Erosion Variability at the Southern Laptev Sea Linked to Winter Sea Ice and the Arctic Oscillation Y1 - 2020 VL - 47 IS - 5 JF - Geophysical Research Letters DO - 10.1029/2019GL086876 DO - 10.23689/fidgeo-4802 N2 - Arctic coastal erosion experiences pronounced effects from ongoing climate change. The Laptev Sea figures among the Arctic regions with the most severe erosion rates. Here, we use unprecedentedly long records of almost 30 years of annual in-situ coastal erosion rate measurements from Bykovsky Peninsula and Muostakh Island to separate the main modes of variability, which we attribute to large-scale drivers. The first (lower-frequency) and second (higher-frequency) modes are associated with winter sea-ice cover in the Laptev Sea and with the Arctic Oscillation, respectively, which together account for 85.1±24.1% of the total observed variance. Arctic coastal erosion has so far been neglected in Earth system models (ESMs). The proposed mechanisms set favorable conditions for coastal erosion at large scales (synoptic to planetary scales), compatible with those represented in modern ESMs. UR - http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/9148 ER -