Data-derived spatial-resolution errors of Antarctic sea-ice thickness
| Autor: | Tracy L. DeLiberty, Cathleen A. Geiger, E. Rachel Bernstein, Mary D. Stampone |
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| Rok vydání: | 2013 |
| Předmět: |
Geography
Planning and Development Resolution (electron density) Mode (statistics) Function (mathematics) Antarctic sea ice Geodesy R-value (insulation) Distribution (mathematics) Climatology General Earth and Planetary Sciences General Agricultural and Biological Sciences Image resolution Geology Smoothing |
| Zdroj: | Polar Geography. 36:202-220 |
| ISSN: | 1939-0513 1088-937X |
| Popis: | Uncertainties due to spatial resolution (E R) of gridded sea-ice thickness (z) distributions remain largely unquantified. We address this issue using remotely sensed and in situ observations of the Southern Ocean (south of −60°) to determine appropriate data sources based on length scales for continental-scale sea-ice studies. Sea-ice thickness is not normally distributed such that the mean, median, and mode are distinct from each other. Averaging only retains the mean value, reducing bias and natural variability as z is aggregated to coarse resolutions. The rate of smoothing as a function of resolution influences the sea-ice thickness distribution represented by each product. Analysis of E R for 1° through 5° resolutions shows absolute E R increasing with grid-cell size and sea-ice extent in both datasets. The absolute E R for gridded thickness distribution ranges from 0.02 to 0.40 m at 1° and from 0.03 to 0.78 m at 5°. The E R value and slope (m) is lower (E R≤0.20 m, m |
| Databáze: | OpenAIRE |
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