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 - Greenland ice sheet mass balance JF - Reports on Progress in Physics Y1 - 2015 A1 - Khan, Shfaqat A. A1 - Aschwanden, Andy A1 - Bjørk, Anders A A1 - Whar, John A1 - Kjeldsen, Kristian K. A1 - Kjær, Kurt H. AB - Mass balance equation for glaciers; areal distribution and ice volumes; estimates of actual mass balance; loss by calving of icebergs; hydrological budget for Greenland; and temporal variations of Greenland mass balance are examined. PB - IOP Publishing VL - 78 UR - http://dx.doi.org/10.1088/0034-4885/78/4/046801 ER -