TY - JOUR T1 - Asynchronous behavior of outlet glaciers feeding Godth\aabsfjord (Nuup Kangerlua) and the triggering of Narsap Sermia's retreat in SW Greenland JF - J. Glaciol. Y1 - 2017 A1 - Motyka, Roman J. A1 - Cassotto, Ryan A1 - Truffer, Martin A1 - Kjeldsen, Kristian K. A1 - Van As, Dirk A1 - Korsgaard, Niels J. A1 - Fahnestock, Mark A1 - Howat, Ian A1 - Langen, Peter L. A1 - Mortensen, John A1 - Lennert, Kunuk A1 - Rysgaard, Søren KW - glacier calving KW - glacier discharge KW - glacier mass balance KW - ice/atmosphere interactions KW - ice/ocean interactions KW - tidewater glaciers AB - We assess ice loss and velocity changes between 1985 and 2014 of three tidewater and five-land terminating glaciers in Godth{\aa}bsfjord (Nuup Kangerlua), Greenland. Glacier thinning accounted for 43.8 ± 0.2 km 3 of ice loss, equivalent to 0.10 mm eustatic sea-level rise. An additional 3.5 ± 0.3 km 3 was lost to the calving retreats of Kangiata Nunaata Sermia (KNS) and Narsap Sermia (NS), two tidewater glaciers that exhibited asynchronous behavior over the study period. KNS has retreated 22 km from its Little Ice Age (LIA) maximum (1761 AD), of which 0.8 km since 1985. KNS has stabilized in shallow water, but seasonally advects a 2 km long floating tongue. In contrast, NS began retreating from its LIA moraine in 2004–06 (0.6 km), re-stabilized, then retreated 3.3 km during 2010–14 into an over-deepened basin. Velocities at KNS ranged 5–6 km a −1 , while at NS they increased from 1.5 to 5.5 km a −1 between 2004 and 2014. We present comprehensive analyses of glacier thinning, runoff, surface mass balance, ocean conditions, submarine melting, bed topography, ice mélange and conclude that the 2010–14 NS retreat was triggered by a combination of factors but primarily by an increase in submarine melting. VL - 63 ER - TY - JOUR T1 - Rapid thinning of lake-calving Yakutat Glacier and the collapse of the Yakutat Icefield, southeast Alaska, USA JF - J. Glaciol. Y1 - 2013 A1 - Trüssel, Barbara L. A1 - Motyka, Roman J. A1 - Truffer, M. A1 - Larsen, C. F. VL - 59 UR - http://www.igsoc.org/journal/59/213/t12J081.html ER - TY - JOUR T1 - Observing calving-generated ocean waves with coastal broadband seismometers, Jakobshavn Isbræ, Greenland JF - Annals Of Glaciology Y1 - 2012 A1 - Amundson, J. M. A1 - Clinton, John F A1 - Fahnestock, M.A. A1 - Truffer, M. A1 - Motyka, Roman J. A1 - Lüthi, Martin P. VL - 53 ER - TY - JOUR T1 - Episodic reactivation of large-scale push moraines in front of the advancing Taku Glacier, Alaska JF - J. Geophys. Res. Y1 - 2006 A1 - Kuriger, Elsbeth Maria A1 - Truffer, M. A1 - Motyka, Roman J. A1 - Bucki, Adam K. VL - 111 UR - http://www.agu.org/pubs/crossref/2006/2005JF000385.shtml ER - TY - JOUR T1 - Rapid erosion of soft sediments by tidewater glacier advance: Taku Glacier, Alaska, USA JF - Geophys. Res. Lett. Y1 - 2006 A1 - Motyka, Roman J. A1 - Truffer, M. A1 - Kuriger, Elsbeth Maria A1 - Bucki, Adam K. VL - 33 UR - http://www.agu.org/pubs/crossref/2006/2006GL028467.shtml ER - TY - JOUR T1 - Subglacial drilling at Black Rapids Glacier, Alaska, U.S.A : drilling method and sample descriptions JF - J. Glaciol. Y1 - 1999 A1 - Truffer, M. A1 - Motyka, Roman J. A1 - Harrison, W.D. A1 - Echelmeyer, K. A. A1 - Fisk, B. A1 - Tulaczyk, S. VL - 45 ER -