@techreport{96ee3e98b0e147cb80bfb109888bca5d,
title = "High mid-Holocene accumulation rates over West Antarctica inferred from a pervasive ice-penetrating radar reflector",
abstract = "Modelling the past and future evolution of the West Antarctic Ice Sheet (WAIS) to atmospheric and ocean forcing is challenged by the availability and quality of observed palaeo-boundary conditions. Key potential data for reconstructing past ice-sheet processes on large spatial scales are Internal Reflecting Horizons (IRHs) detected by Radio-Echo Sounding (RES) techniques. When isochronal and dated at ice cores, IRHs can be used to determine palaeo-accumulation rates and patterns. Using a spatially extensive IRH over Pine Island Glacier, Thwaites Glacier, Institute and M{\"o}ller Ice Streams, and a local layer approximation model, we infer mid-Holocene accumulation rates over the slow-flowing parts of these catchments for the past ~5000 years. By comparing our results with modern climate reanalysis models and observational syntheses, we estimate that accumulation rates over the Amundsen-Weddell-Ross divide were on average 18 % higher than modern rates during the mid-Holocene. However, no significant spatial changes in the accumulation pattern were observed. These higher mid-Holocene accumulation-rate estimates match previous palaeo-accumulation estimates from ice-core and targeted IPR surveys over the ice divide, and also coincide with periods of grounding-line re-advance during the Holocene over the Weddell and Ross Sea sectors. Our results highlight the need for ice-sheet models to account for time-varying accumulation rates across the WAIS during the Holocene to provide better estimates of its contribution to past sea-level rise.",
author = "Bodart, {J. A.} and Bingham, {R. G.} and Young, {D. A.} and MacGregor, {J. A.} and Ashmore, {D. W.} and E. Quartini and Hein, {A. S.} and Vaughan, {D. G.} and Blankenship, {D. D.}",
year = "2022",
month = nov,
day = "1",
doi = "10.5194/tc-2022-199",
language = "Undefined/Unknown",
volume = "2022",
series = "The Cryosphere Discussions",
pages = "1--22",
type = "WorkingPaper",
}