Loading...
Please wait, while we are loading the content...
Simultaneous estimation of wintertime sea ice thickness and snow depth from space-borne freeboard measurements
| Content Provider | Scilit |
|---|---|
| Author | Shi, Hoyeon Sohn, Byung-Ju Dybkjær, Gorm Tonboe, Rasmus Tage Lee, Sang-Moo |
| Copyright Year | 2020 |
| Description | A method of simultaneously estimating snow depth and sea ice thickness using satellite-based freeboard measurements over the Arctic Ocean during winter was proposed. The ratio of snow depth to ice thickness (referred to as α) was defined and used in constraining the conversion from the freeboard to ice thickness in satellite altimetry. Then, α was empirically determined using the ratio of temperature difference of the snow layer to the difference of the ice layer, to allow the determination of α from satellite-derived snow surface temperature and snow–ice interface temperature. The proposed method was validated against NASA's Operation IceBridge measurements, and comparison results indicated that the algorithm adequately retrieves snow depth and ice thickness simultaneously: retrieved ice thickness was found to be better than the current satellite retrieval methods relying on the use of snow depth climatology as input, in terms of mean bias and RMSE. The application of the proposed method to CryoSat-2 ice freeboard measurements yields similar results. In conclusion, the developed α-based method has the capacity to derive ice thickness and snow depth, without relying on the snow depth information as input to the buoyancy equation for converting freeboard to ice thickness. |
| DOI | 10.5194/tc-2020-27 |
| Volume Number | 2020 |
| Language | English |
| Publisher | Copernicus GmbH |
| Publisher Date | 2020-02-25 |
| Access Restriction | Open |
| Subject Keyword | Imaging Science Ice Thickness Snow Depth Freeboard Measurements Thickness and Snow Depth To Ice |
| Content Type | Text |
| Resource Type | Article |
