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- W3115305519 abstract "<p>Basal melting of floating ice shelves is the main process by which&#160; the Antarctic ice sheet is currently losing ice and is responsible for the accelerating Antarctic contribution to sea-level rise. Moreover, basal melting can strongly vary both spatially and temporally. Detailed observations on high&#160; spatio-temporal scales remain however challenging, not to mention accounting for them in ice-sheet models.&#160;</p> <p>In this study, we combine CryoSat-2 and TanDEM-X elevation changes to capture in unprecedented detail the spatial (and temporal) variability of ice-shelf basal melting in the entire region of Dronning Maud Land, East Antarctica. The high spatial resolution of TanDEM-X elevations provide us with great&#160; details on the spatial variability of the basal mass balance, whereas CryoSat-2 elevations inform us about temporal changes.</p> <p>We find sub-shelf melt rates that average 1 m/a for the whole of Dronning Maud Land. Those relatively low melt rates conceal however a significant spatial variability on a wide range of scales (from sub-kilometers to ice-shelf wide scales). Spatially integrated, this basal melting represent&#160; an annual basal loss ~140 Gt/a. This revised estimate corresponds to a two-fold increase compared to previous estimates, which could question the relative stability of ice shelves in this region.&#160;</p> <p>This study highlights different regimes in sub-shelf melting in Dronning Maud Land and&#160; sheds new light on ice-ocean interactions in a region of Antarctica that has long been considered as very stable and which is therfore regularly overlooked.</p>" @default.
- W3115305519 created "2021-01-05" @default.
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- W3115305519 date "2020-03-10" @default.
- W3115305519 modified "2023-09-26" @default.
- W3115305519 title "Basal melting of Dronning Maud Land ice shelves twice as high as previously estimated" @default.
- W3115305519 doi "https://doi.org/10.5194/egusphere-egu2020-15477" @default.
- W3115305519 hasPublicationYear "2020" @default.
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