Airborne-radar and ice-core observations of annual snow accumulation over Thwaites Glacier, West Antarctica confirm the spatiotemporal variability of global and regional atmospheric models

dc.contributor.author Medley, Brooke
dc.contributor.author Joughin, Ian
dc.contributor.author Das, Sarah B.
dc.contributor.author Steig, Eric J.
dc.contributor.author Conway, Howard
dc.contributor.author Gogineni, S.
dc.contributor.author Criscitiello, Alison S.
dc.contributor.author McConnell, Joseph R.
dc.contributor.author Smith, B. E.
dc.contributor.author van den Broeke, Michiel R.
dc.contributor.author Lenaerts, Jan T. M.
dc.contributor.author Bromwich, D. H.
dc.contributor.author Nicolas, J. P.
dc.date.accessioned 2013-09-25T14:51:24Z
dc.date.available 2014-10-22T08:57:21Z
dc.date.issued 2013-07-26
dc.description Author Posting. © American Geophysical Union, 2013. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 40 (2013): 3649–3654, doi:10.1002/grl.50706. en_US
dc.description.abstract We use an airborne-radar method, verified with ice-core accumulation records, to determine the spatiotemporal variations of snow accumulation over Thwaites Glacier, West Antarctica between 1980 and 2009. We also present a regional evaluation of modeled accumulation in Antarctica. Comparisons between radar-derived measurements and model outputs show that three global models capture the interannual variability well (r > 0.9), but a high-resolution regional model (RACMO2) has better absolute accuracy and captures the observed spatial variability (r = 0.86). Neither the measured nor modeled accumulation records over Thwaites Glacier show any trend since 1980. Although an increase in accumulation may potentially accompany the observed warming in the region, the projected trend is too small to detect over the 30 year record. en_US
dc.description.embargo 2014-01-26 en_US
dc.description.sponsorship This research was supported at UW by NSF OPP grants ANT-0631973 (B.M., I.J., E.J.S., and H.C.) and ANT-0424589 (B.M. and I.J.) and at WHOI by ANT-0632031 (S.B.D. and A.S.C.). D.H.B. and J.P.N. were supported by NASA grant NN12XAI29G. We acknowledge the work by the CReSIS team that went into developing the snow-radar system, which was partially supported with by NASA grant NNX10AT68G and by NSF OPP grant ANT-0424589 awarded to S.P. en_US
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dc.format.mimetype application/pdf
dc.identifier.citation Geophysical Research Letters 40 (2013): 3649–3654 en_US
dc.identifier.doi 10.1002/grl.50706
dc.identifier.uri https://hdl.handle.net/1912/6234
dc.language.iso en_US en_US
dc.publisher John Wiley & Sons en_US
dc.relation.uri https://doi.org/10.1002/grl.50706
dc.subject West Antarctica en_US
dc.subject Snow accumulation en_US
dc.subject Airborne radar en_US
dc.subject Firn en_US
dc.title Airborne-radar and ice-core observations of annual snow accumulation over Thwaites Glacier, West Antarctica confirm the spatiotemporal variability of global and regional atmospheric models en_US
dc.type Article en_US
dspace.entity.type Publication
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