Blar i forfatter "Luckman, Adrian"

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    • Calving rates at tidewater glaciers vary strongly with ocean temperature 

      Luckman, Adrian; Benn, Doug; Cottier, Finlo; Bevan, Suzanne; Nilsen, Frank; Inall, Mark (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-10-09)
      Rates of ice mass loss at the calving margins of tidewater glaciers (frontal ablation rates) are a key uncertainty in sea level rise projections. Measurements are difficult because mass lost is replaced by ice flow at variable rates, and frontal ablation incorporates sub-aerial calving, and submarine melt and calving. Here we derive frontal ablation rates for three dynamically contrasting glaciers ...

    • A Full-Stokes 3-D Calving Model Applied to a Large Greenlandic Glacier 

      Todd, Joe; Christoffersen, Poul; Zwinger, Thomas; Råback, Peter; Chauché, Nolwenn; Benn, Doug; Luckman, Adrian; Ryan, Johnny; Toberg, Nick; Slater, Donald; Hubbard, Alun Lloyd (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-01-30)
      Iceberg calving accounts for around half of all mass loss from both the Greenland and Antarctic ice sheets. The diverse nature of calving and its complex links to both internal dynamics and climate make it challenging to incorporate into models of glaciers and ice sheets. Here we present results from a new open‐source 3‐D full‐Stokes calving model developed in Elmer/Ice. The calving model implements ...

    • Glacier Calving Rates Due to Subglacial Discharge, Fjord Circulation, and Free Convection 

      Schild, Kristin M.; Renshaw, Carl E.; Benn, Douglas I.; Luckman, Adrian; Hawley, Robert L.; How, Penelope Ruth; Trusel, Luke D.; Cottier, Finlo Robert; Pramanik, Ankit; Hulton, Nicholas R.J. (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-09-15)
      Tidewater glacier calving provides the most direct mechanism of ice transfer from land to the ocean. However, the physical melt processes influencing calving remain challenging to constrain. In this study we focus on calving rates at Kongsbreen, a tidewater glacier in Svalbard, due to three mechanisms of submarine melt: (1) free convection, (2) horizontal fjord circulation, and (3) meltwater ...

    • Physical Conditions of Fast Glacier Flow: 3.Seasonally-Evolving Ice Deformation onStore Glacier, West Greenland 

      Young, Tun Jan; Christoffersen, Poul; Doyle, Samuel H.; Nicholls, Keith W.; Stewart, C.L.; Hubbard, Bryn; Hubbard, Alun Lloyd; Lok, Lai B.; Brennan, Paul V.; Benn, Douglas I; Luckman, Adrian; Bougamont, Marion H. (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-01-08)
      Temporal variations in ice sheet flow directly impact the internal structure within ice sheetsthrough englacial deformation. Large-scale changes in the vertical stratigraphy within ice sheets havebeen previously conducted on centennial to millennial timescales; however, intra-annual changes inthe morphology of internal layers have yet to be explored. Over a period of 2 years, we use autonomousphas ...