Grounding line retreat of Denman Glacier, East Antarctica, measured with COSMO-SkyMed radar interferometry data ...
Denman Glacier, East Antarctica, holds an ice volume equivalent to a 1.5 m rise in global sea level. Using satellite radar interferometry from the COSMO-SkyMed constellation, we detect a 5.40.3 km grounding line retreat between 1996 and 2017-2018. A novel reconstruction of the glacier bed topography...
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| Format: | Dataset |
| Language: | unknown |
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2023
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| Online Access: | https://dx.doi.org/10.48577/jpl.novbyz http://dataverse.jpl.nasa.gov/citation?persistentId=doi:10.48577/jpl.NOVBYZ |
| Summary: | Denman Glacier, East Antarctica, holds an ice volume equivalent to a 1.5 m rise in global sea level. Using satellite radar interferometry from the COSMO-SkyMed constellation, we detect a 5.40.3 km grounding line retreat between 1996 and 2017-2018. A novel reconstruction of the glacier bed topography indicates that the retreat proceeds on the western flank along a previously unknown 5 km wide, 1,800 m deep trough, deepening to 3,400 m below sea level. On the eastern ank, the grounding line is stabilized by a 10 km wide ridge. At tidal frequencies, the grounding line extends over a several kilometer-wide grounding zone, enabling warm ocean water to melt ice at critical locations for glacier stability. If warm, modied Circumpolar Deep Water reaches the sub-ice-shelf cavity and continues to melt ice at a rate exceeding balance conditions, the potential exists for Denman Glacier to retreat irreversibly into the deepest, marine-based basin in Antarctica. ... |
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