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- Title
Accumulation patterns around Dome C, East Antarctica, in the last 73 kyr.
- Authors
Cavitte, Marie G. P.; Parrenin, Frédéric; Ritz, Catherine; Young, Duncan A.; Van Liefferinge, Brice; Blankenship, Donald D.; Frezzotti, Massimo; Roberts, Jason L.
- Abstract
We reconstruct the pattern of surface accumulation in the region around Dome C, East Antarctica, since the last glacial. We use a set of 18 isochrones spanning all observable depths of the ice column, interpreted from various ice-penetrating radar surveys and a 1-D ice flow model to invert for accumulation rates in the region. The shallowest four isochrones are then used to calculate paleoaccumulation rates between isochrone pairs using a 1-D assumption where horizontal advection is negligible in the time interval of each layer. We observe that the large-scale (100s km) surface accumulation gradient is spatially stable through the last 73 kyr, which reflects current modeled and observed precipitation gradients in the region. We also observe small-scale (10 s km) accumulation variations linked to snow redistribution at the surface, due to changes in its slope and curvature in the prevailing wind direction that remain spatially stationary since the last glacial.
- Subjects
EAST Antarctica (Antarctica); SNOW accumulation; METEOROLOGICAL precipitation; GLACIATION; WIND speed
- Publication
Cryosphere, 2018, Vol 12, Issue 4, p1401
- ISSN
1994-0416
- Publication type
Article
- DOI
10.5194/tc-12-1401-2018