Optimising Interannual Sea Ice Thickness Variability Retrieved From CryoSat‐2
| Autor: | Carmen Nab, Robbie Mallett, Connor Nelson, Julienne Stroeve, Michel Tsamados |
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| Jazyk: | angličtina |
| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | Geophysical Research Letters, Vol 51, Iss 21, Pp n/a-n/a (2024) |
| Druh dokumentu: | article |
| ISSN: | 1944-8007 0094-8276 05644070 |
| DOI: | 10.1029/2024GL111071 |
| Popis: | Abstract Satellite radar altimeters like CryoSat‐2 estimate sea ice thickness by measuring the return‐time of transmitted radar pulses, reflected from the sea ice and ocean surface, to measure the radar freeboard. Converting freeboard to thickness requires an assumption regarding the fractional depth of the snowpack from which the radar waves backscatter (α). We derive sea ice thickness from CryoSat‐2 radar freeboard data with incremental values for α, for the 2010–2021 winter periods. By comparing these to sea ice thickness estimates derived from upward‐looking sonar moorings, we find that α values between 35%–80% result in the best representation of interannual variability observed over first‐year ice, reduced to |
| Databáze: | Directory of Open Access Journals |
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