Interannual sea ice thickness variability in the Bay of Bothnia
| Autor: | Eero Rinne, Iina M Ronkainen, Jonni Lehtiranta, Mikko Lensu, Jari Haapala, Christian Haas |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Drift ice
lcsh:GE1-350 010504 meteorology & atmospheric sciences lcsh:QE1-996.5 Drilling 010502 geochemistry & geophysics Atmospheric sciences 01 natural sciences Ice thickness Physics::Geophysics lcsh:Geology Fast ice Baltic sea 13. Climate action Sea ice thickness 14. Life underwater Astrophysics::Earth and Planetary Astrophysics Bay Geology Physics::Atmospheric and Oceanic Physics lcsh:Environmental sciences 0105 earth and related environmental sciences Earth-Surface Processes Water Science and Technology |
| Zdroj: | The Cryosphere, Vol 12, Pp 3459-3476 (2018) EPIC3The Cryosphere, 12, pp. 3459-3476 |
| ISSN: | 1994-0424 1994-0416 |
| Popis: | While variations of Baltic Sea ice extent and thickness have been extensively studied, there is little information about drift ice thickness, distribution, and its variability. In our study, we quantify the interannual variability of sea ice thickness in the Bay of Bothnia during the years 2003–2016. We use various different data sets: official ice charts, drilling data from the regular monitoring stations in the coastal fast ice zone, and helicopter and shipborne electromagnetic soundings. We analyze the different data sets and compare them to each other to characterize the interannual variability, to discuss the ratio of level and deformed ice, and to derive ice thickness distributions in the drift ice zone. In the fast ice zone the average ice thickness is 0.58±0.13 m. Deformed ice increases the variability of ice conditions in the drift ice zone, where the average ice thickness is 0.92±0.33 m. On average, the fraction of deformed ice is 50 % to 70 % of the total volume. In heavily ridged ice regions near the coast, mean ice thickness is approximately half a meter thicker than that of pure thermodynamically grown fast ice. Drift ice exhibits larger interannual variability than fast ice. |
| Databáze: | OpenAIRE |
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