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<p>Climate change is significantly altering coastal environments, with erosion, inundation and storm surge events posing a serious threat to local communities. Arctic coasts are particularly vulnerable to erosion due to rapidly increasing temperatures, permafrost thaw and sea-ice loss. Geoinformation, encompassing Geographical Information Systems (GIS) and Earth Observation (EO), provide a reliable cost- and time-efficient approach to monitor and understand coastal dynamics in Arctic regions. The primary objective of this study is to assess the physical coastal vulnerability of Norway’s Arctic and sub-Arctic coastline using the Coastal Vulnerability Index (CVI), incorporating six variables: relative sea-level rise, mean tidal range, significant wave height, geomorphology, coastal slope and shoreline erosion/accretion rate. The application of CVI in the present study shows that more than half of the coastline is characterized by very low (8.26%) and low (44.59%) vulnerability, while 13.23% and 9.14% are categorized as highly and very highly vulnerable, respectively. Spatial analysis indicates a sharp contrast between sheltered fjords and exposed islands, which along with the southern part of Norway exhibit higher vulnerability due to low coastal slopes and direct exposure to open sea wave action. The findings of this study provide an additional instrument to decision-makers, who bear the responsibility to develop coastal management strategies against climate-driven coastal hazards.</p>

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Coastal vulnerability assessment in Norway: a geoinformation-based approach

  • 期刊论文

  • 发表日期：

    2025年11月29日

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  • Christos Asimakopoulos,
  • George P. Petropoulos,
  • Anna Karkani,
  • Niki Evelpidou,
  • Spyridon E. Detsikas

摘要

Climate change is significantly altering coastal environments, with erosion, inundation and storm surge events posing a serious threat to local communities. Arctic coasts are particularly vulnerable to erosion due to rapidly increasing temperatures, permafrost thaw and sea-ice loss. Geoinformation, encompassing Geographical Information Systems (GIS) and Earth Observation (EO), provide a reliable cost- and time-efficient approach to monitor and understand coastal dynamics in Arctic regions. The primary objective of this study is to assess the physical coastal vulnerability of Norway’s Arctic and sub-Arctic coastline using the Coastal Vulnerability Index (CVI), incorporating six variables: relative sea-level rise, mean tidal range, significant wave height, geomorphology, coastal slope and shoreline erosion/accretion rate. The application of CVI in the present study shows that more than half of the coastline is characterized by very low (8.26%) and low (44.59%) vulnerability, while 13.23% and 9.14% are categorized as highly and very highly vulnerable, respectively. Spatial analysis indicates a sharp contrast between sheltered fjords and exposed islands, which along with the southern part of Norway exhibit higher vulnerability due to low coastal slopes and direct exposure to open sea wave action. The findings of this study provide an additional instrument to decision-makers, who bear the responsibility to develop coastal management strategies against climate-driven coastal hazards.