| The shore of the arctic seas are generally of low reliefand the combination of waves and high water levels during latesummer and fall storms before the development of significantsea-ice cover can be particularly damaging to shorelines. Gravel barrier beaches can be overwashedand eroded while bluffs consisting of unlithified ice-bondedsediment and segregated ice can fail and retreat. Storm surge climatology of the arctic marginal seasis investigated based on observational data and a 2-Dcoupled ice-ocean barotropic model results.Meteorological forcing is calculated based on NCAR/NCEP reanalysis data for 1948-present period.The spatial resolution of the model is 13.89 km. The sea ice conditions (concentration and thickness) are prescribedon the mean monthly basis.The model was calibrated based on the most strong storm surges observed inthe Kara, Laptev, East-Siberian, Chukchi and Beaufort Seas.Simulation results are in relatively good agreement with observations of sea level heights and ice drift. Detailed studies showed that the spatial and temporal resolutionof the NCEP/NCAR sea level pressure data (2.5x2.5 degree, 6 hours) are too low and can not reproducewell extreme conditions in the relatively small polar cyclones butstorm surge event frequency is reproduce very well.The results of this study can be used to aid current and future scenario risk assessments of coastal flooding and costal erosion rates. |
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