Variability of the Pechora Sea Ice Area and the Relationship between Its Area and Wind Speed According to Satellite Observations and Reanalysis Data

E. V. L’vova; E. V. Zabolotskikh

doi:10.7868/S2412376525030103

Variability of the Pechora Sea Ice Area and the Relationship between Its Area and Wind Speed According to Satellite Observations and Reanalysis Data

E. V. L’vova, E. V. Zabolotskikh

https://doi.org/10.7868/S2412376525030103

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Abstract

Variability of the Pechora Sea ice area, wind speed at a height of 10 m and ice thickness were studied for the period from 2002 to 2023 (excluding the 2011/12 season) using satellite and reanalysis data. The influence of wind on the sea ice area was analyzed. The sea ice area values were calculated based on the product of sea ice concentration according to the AMSR2 satellite measurements. To analyze the wind variability, the daily average ERA5 reanalysis data was obtained by averaging hourly data. To analyze the sea ice thickness, irregular ICESat track measurement data over the Pechora Sea region were used. To study the spatial and temporal variability of the sea ice area and wind, maps of daily average parameter fields were constructed. Visual analysis of the maps and quantitative analysis of the sea ice area and wind values allowed to identify patterns in ice cover changes in the Pechora Sea, wind speed variability, and to highlight the days when intense cyclones were observed over the sea. To study the effect of wind on the sea ice area, the Pearson linear correlation was used for the days when the wind speed exceeded 7 m/s and had predominantly one direction over most of the water area (more than 75%). High values of inverse correlation were found only considering a time lag of two days. With such a lag, higher values of the inverse correlation coefficients between wind speed and sea ice area were found for the autumn–winter period (up to –0.39). During the passage of cyclones through the Pechora Sea area, a correlation was observed between the wind speed and the sea ice area (–0.32).

Keywords

sea ice, wind, Pechora Sea, statistical analysis, AMSR, ERA5, ICESat,

About the Authors

E. V. L’vova

Russian State Hydrometeorological University
Russian Federation
St. Petersburg

E. V. Zabolotskikh

Russian State Hydrometeorological University
Russian Federation
St. Petersburg

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Supplementary files

For citation: L’vova E.V., Zabolotskikh E.V. Variability of the Pechora Sea Ice Area and the Relationship between Its Area and Wind Speed According to Satellite Observations and Reanalysis Data. Ice and Snow. 2025;65(3):487-501. https://doi.org/10.7868/S2412376525030103

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