00359nas a2200121 4500008004100000245004000041210004000081490000600121100002200127700002500149700002200174856004100196 2013 eng d00aFlow velocities of Alaskan glaciers0 aFlow velocities of Alaskan glaciers0 v41 aBurgess, Evan, W.1 aForster, Richard, R.1 aLarsen, Chris, F. uhttp://dx.doi.org/10.1038/ncomms314601821nas a2200157 4500008004100000245008000041210006900121300001200190490000700202520128600209100001801495700002501513700002201538700001901560856008401579 2013 eng d00aThe propagation of a surge front on Bering Glacier, Alaska, 2001–20110 apropagation of a surge front on Bering Glacier Alaska 2001821120 a221-2280 v543 aBering Glacier, Alaska, USA, has a ∼20 year surge cycle, with its most recent surge reaching the terminus in 2011. To study this most recent activity a time series of ice velocity maps was produced by applying optical feature-tracking methods to Landsat-7 ETM+ imagery spanning 2001–11. The velocity maps show a yearly increase in ice surface velocity associated with the down-glacier movement of a surge front. In 2008/09 the maximum ice surface velocity was 1.5 ± 0.017 km a–1 in the mid-ablation zone, which decreased to 1.2 ± 0.015 km a–1 in 2009/10 in the lower ablation zone, and then increased to nearly 4.4 ± 0.03 km a–1 in summer 2011 when the surge front reached the glacier terminus. The surge front propagated down-glacier as a kinematic wave at an average rate of 4.4 ± 2.0 km a–1 between September 2002 and April 2009, then accelerated to 13.9 ± 2.0 km a–1 as it entered the piedmont lobe between April 2009 and September 2010. The wave seems to have initiated near the confluence of Bering Glacier and Bagley Ice Valley as early as 2001, and the surge was triggered in 2008 further down-glacier in the mid-ablation zone after the wave passed an ice reservoir area.1 aTurrin, James1 aForster, Richard, R.1 aLarsen, Chris, F.1 aSauber, Jeanne uhttp://www.ingentaconnect.com/content/igsoc/agl/2013/00000054/00000063/art0002400661nas a2200181 4500008004100000245010100041210006900142300001200211490000700223100001500230700002500245700001400270700002200284700002000306700001900326700001700345856011700362 2013 eng d00aSoutheast Greenland high accumulation rates derived from firn cores and ground-penetrating radar0 aSoutheast Greenland high accumulation rates derived from firn co a322-3320 v541 aMiège, C.1 aForster, Richard, R.1 aBox, J.E.1 aBurgess, Evan, W.1 aMcConnell, J.R.1 aPasteris, D.R.1 aSpikes, V.B. uhttp://www.scopus.com/inward/record.url?eid=2-s2.0-84881651457&partnerID=40&md5=6aa824682a2fef9009d445649f72c29801577nas a2200205 4500008004100000022001400041245007100055210006900126520095700195653001101152653001701163653002201180653002001202653002601222653001101248100002201259700002201281700002501303856004301328 2013 eng d a1944-800700aSummer melt regulates winter glacier flow speeds throughout Alaska0 aSummer melt regulates winter glacier flow speeds throughout Alas3 aPredicting how climate change will affect glacier and ice sheet flow speeds remains a large hurdle towards accurate sea level rise forecasting. Increases in surface melt rates are known to accelerate glacier flow in summer, whereas in winter, flow speeds are believed to be relatively invariant. Here we show that wintertime flow speeds on nearly all major glaciers throughout Alaska are not only variable but are inversely related to melt from preceding summers. For each additional meter of summertime melt, we observe an 11% decrease in wintertime velocity on glaciers of all sizes, geometries, climates and bed types. This dynamic occurs because inter-annual differences in summertime melt affect how much water is retained in the sub-glacial system during winter. The ubiquity of the dynamic indicates it occurs globally on glaciers and ice sheets not frozen to their beds and thus constitutes a new mechanism affecting sea level rise projections.10aAlaska10aIce Dynamics10aMountain Glaciers10aOffset Tracking10aSub-Glacial Hydrology10aWinter1 aBurgess, Evan, W.1 aLarsen, Chris, F.1 aForster, Richard, R. uhttp://dx.doi.org/10.1002/2013GL05822800707nas a2200181 4500008004100000245015000041210006900191300001400260490000600274100001600280700001500296700001700311700001700328700002200345700001600367700002500383856011700408 2012 eng d00aPlate margin deformation and active tectonics along the northern edge of the Yakutat Terrane in the Saint Elias Orogen, Alaska, and Yukon, Canada0 aPlate margin deformation and active tectonics along the northern a1384-14070 v81 aBruhn, R.L.1 aSauber, J.1 aCotton, M.M.1 aPavlis, T.L.1 aBurgess, Evan, W.1 aRuppert, N.1 aForster, Richard, R. uhttp://www.scopus.com/inward/record.url?eid=2-s2.0-84873486244&partnerID=40&md5=6b0147233ff3aeb0e48bf9b253b6c6ec00454nas a2200145 4500008004100000245006100041210005900102300001600161490000600177100002200183700002500205700002200230700001300252856004300265 2012 eng d00aSurge dynamics on Bering Glacier, Alaska, in 2008–20110 aSurge dynamics on Bering Glacier Alaska in 2008–2011 a1181–12040 v61 aBurgess, Evan, W.1 aForster, Richard, R.1 aLarsen, Chris, F.1 aBraun, M uhttps://glaciers.gi.alaska.edu/node/7900641nas a2200169 4500008004100000245010000041210006900141490000800210100002200218700002500240700001400265700002400279700001900303700001600322700001600338856011700354 2010 eng d00aA spatially calibrated model of annual accumulation rate on the Greenland Ice Sheet (1958-2007)0 aspatially calibrated model of annual accumulation rate on the Gr0 v1151 aBurgess, Evan, W.1 aForster, Richard, R.1 aBox, J.E.1 aMosley-Thompson, E.1 aBromwich, D.H.1 aBales, R.C.1 aSmith, L.C. uhttp://www.scopus.com/inward/record.url?eid=2-s2.0-77951082793&partnerID=40&md5=a6430b7a7a93a85254e4f44589f3b0f4