Coastal erosion dynamics on the permafrost-dominated Bykovsky Peninsula, north Siberia, 1951–2006

Polar research

Pier Paul Overduin¹  Hans-Wolfgang Hubberten¹  Hugues Lantuit²  Guido Grosse³  David Atkinson⁴  Volker Rachold⁵  Mikhail Grigoriev⁶ 

[1] Alfred Wegener Institute for Polar and Marine Research Telegrafenberg A43DE-14473 Potsdam, Germany;Alfred Wegener Institute for Polar and Marine Research Telegrafenberg A43DE-14473 Potsdam, Germany Correspondence;Geophysical Institute, University of Alaska Fairbanks 903 Koyukuk DriveFairbanks AK 99775-7320, USA;International Arctic Research Centre, University of Alaska Fairbanks P.O. Box 757340, AK 99775-7340Fairbanks USA;International Arctic Science Committee Telegrafenberg A43DE-14473 Potsdam Germany;Permafrost Institute of the Siberian Division of the Russian Academy of ScienceRU-677010 Yakutsk, Russia

关键词: Coastal erosion;    permafrost;    Arctic;    climate change;    Russia.;   

DOI  :  10.3402/polar.v30i0.7341

学科分类：自然科学（综合）

来源: Co-Action Publishing

【 摘 要 】

This study investigates the rate of erosion during the 1951–2006 period on the Bykovsky Peninsula, located north-east of the harbour town of Tiksi, north Siberia. Its coastline, which is characterized by the presence of ice-rich sediment (Ice Complex) and the vicinity of the Lena River Delta, retreated at a mean rate of 0.59 m/yr between 1951 and 2006. Total erosion ranged from 434 m of erosion to 92 m of accretion during these 56 years and exhibited large variability (σ = 45.4). Ninety-seven percent of the rates observed were less than 2 m/yr and 81.6% were less than 1 m/yr. No significant trend in erosion could be recorded despite the study of five temporal subperiods within 1951–2006. Erosion modes and rates actually appear to be strongly dependant on the nature of the backshore material, erosion being stronger along low-lying coastal stretches affected by past or current thermokarst activity. The juxtaposition of wind records monitored at the town of Tiksi and erosion records yielded no significant re...

【 授权许可】

CC BY-NC