Yu, Jaehyung; Liu, Hongxing; Jezek, Kenneth C; Warner, Roland C; Wen, Jiahong (2010): Accumulation, velocities, fluxes and mass balance of glacial tributaries to the Lambert Glacier-Amery Ice Shelf system, Antarctica [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.842718, Supplement to: Yu, J et al. (2010): Analysis of velocity field, mass balance, and basal melt of the Lambert Glacier–Amery Ice Shelf system by incorporating Radarsat SAR interferometry and ICESat laser altimetry measurements. Journal of Geophysical Research, 115(B11), B11102, https://doi.org/10.1029/2010JB007456
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Abstract:
By incorporating recently available remote sensing data, we investigated the mass balance for all individual tributary glacial basins of the Lambert Glacier-Amery Ice Shelf system, East Antarctica. On the basis of the ice flow information derived from SAR interferometry and ICESat laser altimetry, we have determined the spatial configuration of eight tributary drainage basins of the Lambert-Amery glacial system. By combining the coherence information from SAR interferometry and the texture information from SAR and MODIS images, we have interpreted and refined the grounding line position. We calculated ice volume flux of each tributary glacial basin based on the ice velocity field derived from Radarsat three-pass interferometry together with ice thickness data interpolated from Australian and Russian airborne radio echo sounding (RES) surveys and inferred from ICESat laser altimetry data. Our analysis reveals that three tributary basins have a significant net positive imbalance, while five other subbasins are slightly positive or close to zero balance. Overall, in contrast to previous studies, we find that the grounded ice in Lambert Glacier-Amery Ice Shelf system has a positive mass imbalance of 22.9 ± 4.4 Gt/a. The net basal melting for the entire Amery Ice Shelf is estimated to be 27.0 ± 7.0 Gt/a. The melting rate decreases rapidly from the grounding zone to the ice shelf front. Significant basal refreezing is detected in the downstream section of the ice shelf. The mass balance estimates for both the grounded ice sheet and the ice shelf mass differ substantially from other recent estimates.
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Latitude: -70.500000 * Longitude: 70.500000
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Comment:
Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150
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Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
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3 datasets
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Datasets listed in this publication series
- Yu, J; Liu, H; Jezek, KC et al. (2010): (Tables 2,4,5) Surface accumulation, ice flux and net mass balance of tributary glacial basins of the Lambert Glacier-Amery Ice Shelf system. https://doi.org/10.1594/PANGAEA.842716
- Yu, J; Liu, H; Jezek, KC et al. (2010): (Table 3) Spatial extent and length of main glacial channels for tributary glacial basins of the Lambert Glacier-Amery Ice Shelf system. https://doi.org/10.1594/PANGAEA.842717
- Yu, J; Liu, H; Jezek, KC et al. (2010): (Table 1) Areas of tributary glacial basins and the Amery Ice Shelf. https://doi.org/10.1594/PANGAEA.842715