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    Christie, Frazer D. W. Bingham, Robert G. Gourmelen, Noel Steig, Eric J. Bisset, Rosie R. Pritchard, Hamish D. Snow, Kate and Tett, Simon F. B. 2018. Glacier change along West Antarctica's Marie Byrd Land Sector and links to inter-decadal atmosphere–ocean variability. The Cryosphere, Vol. 12, Issue. 7, p. 2461.
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Climate and surface mass balance of coastal West Antarctica resolved by regional climate modelling

  • Jan T. M. Lenaerts (a1) (a2), Stefan R. M. Ligtenberg (a2), Brooke Medley (a3), Willem Jan Van de Berg (a2), Hannes Konrad (a4), Julien P. Nicolas (a5), J. Melchior Van Wessem (a2), Luke D. Trusel (a6), Robert Mulvaney (a7), Rebecca J. Tuckwell (a7), Anna E. Hogg (a4) and Elizabeth R. Thomas (a7)...
Abstract

West Antarctic climate and surface mass balance (SMB) records are sparse. To fill this gap, regional atmospheric climate modelling is useful, providing that such models are employed at sufficiently high horizontal resolution and coupled with a snow model. Here we present the results of a high-resolution (5.5 km) regional atmospheric climate model (RACMO2) simulation of coastal West Antarctica for the period 1979–2015. We evaluate the results with available in situ weather observations, remote-sensing estimates of surface melt, and SMB estimates derived from radar and firn cores. Moreover, results are compared with those from a lower-resolution version, to assess the added value of the resolution. The high-resolution model resolves small-scale climate variability invoked by topography, such as the relatively warm conditions over ice-shelf grounding zones, and local wind speed accelerations. Surface melt and SMB are well reproduced by RACMO2. This dataset will prove useful for picking ice core locations, converting elevation changes to mass changes, for driving ocean, ice-sheet and coupled models, and for attributing changes in the West Antarctic Ice Sheet and shelves to changes in atmospheric forcing.

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COPYRIGHT: © The Author(s) 2017
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
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