Insights into spatial sensitivities of ice mass response to environmental change from the SeaRISE ice sheet modeling project I: Antarctica
| Autor: | Sophie Nowicki, Constantine Khroulev, Tatsuru Sato, Mathieu Morlighem, Ralf Greve, Charles S. Jackson, Hyeungu Choi, B. R. Parizek, Jesse V. Johnson, Wei Li Wang, Robert Bindschadler, Glen Granzow, Eric Rignot, Eric Larour, Fuyuki Saito, Maria A. Martin, Ute Christina Herzfeld, David Pollard, Ayako Abe-Ouchi, William H. Lipscomb, R. T. Walker, Diandong Ren, Helene Seroussi, James L. Fastook, Kunio Takahashi, Gail Gutowski, Stephen Price, Hakime Seddik, Anders Levermann, Andy Aschwanden, Ed Bueler |
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| Rok vydání: | 2013 |
| Předmět: |
geography
geography.geographical_feature_category 010504 meteorology & atmospheric sciences Ice stream Antarctic ice sheet Antarctic sea ice 15. Life on land 010502 geochemistry & geophysics 01 natural sciences Ice shelf Ice-sheet model Geophysics 13. Climate action Climatology Sea ice Cryosphere 14. Life underwater Ice sheet Geology 0105 earth and related environmental sciences Earth-Surface Processes |
| Zdroj: | Journal of Geophysical Research: Earth Surface. 118:1002-1024 |
| ISSN: | 2169-9003 |
| Popis: | Atmospheric, oceanic, and subglacial forcing scenarios from the Sea-level Response to Ice Sheet Evolution (SeaRISE) project are applied to six three-dimensional thermomechanical ice-sheet models to assess Antarctic ice sheet sensitivity over a 500 year timescale and to inform future modeling and field studies. Results indicate (i) growth with warming, except within low-latitude basins (where inland thickening is outpaced by marginal thinning); (ii) mass loss with enhanced sliding (with basins dominated by high driving stresses affected more than basins with low-surface-slope streaming ice); and (iii) mass loss with enhanced ice shelf melting (with changes in West Antarctica dominating the signal due to its marine setting and extensive ice shelves; cf. minimal impact in the Terre Adelie, George V, Oates, and Victoria Land region of East Antarctica). Ice loss due to dynamic changes associated with enhanced sliding and/or sub-shelf melting exceeds the gain due to increased precipitation. Furthermore, differences in results between and within basins as well as the controlling impact of sub-shelf melting on ice dynamics highlight the need for improved understanding of basal conditions, grounding-zone processes, ocean-ice interactions, and the numerical representation of all three. |
| Databáze: | OpenAIRE |
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