Search Results - "DOWDESWELL, JULIAN A."

Distinctive iceberg ploughmarks on the mid-Norwegian margin: Tidally influenced chains of pits with implications for iceberg drift by Ottesen, Dag, Dowdeswell, Julian A.

“…Curvilinear depressions and chains of asymmetrical to circular pits up to a few meters deep and a few tens of meters wide have been mapped on the upper…”
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Basal melting of Ross Ice Shelf from solar heat absorption in an ice-front polynya by Stewart, Craig L., Christoffersen, Poul, Nicholls, Keith W., Williams, Michael J. M., Dowdeswell, Julian A.

“…Ice–ocean interactions at the bases of Antarctic ice shelves are rarely observed, yet have a profound influence on ice sheet evolution and stability. Ice sheet…”
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The International Bathymetric Chart of the Arctic Ocean (IBCAO) Version 3.0 by Jakobsson, Martin, Mayer, Larry, Coakley, Bernard, Dowdeswell, Julian A., Forbes, Steve, Fridman, Boris, Hodnesdal, Hanne, Noormets, Riko, Pedersen, Richard, Rebesco, Michele, Schenke, Hans Werner, Zarayskaya, Yulia, Accettella, Daniela, Armstrong, Andrew, Anderson, Robert M., Bienhoff, Paul, Camerlenghi, Angelo, Church, Ian, Edwards, Margo, Gardner, James V., Hall, John K., Hell, Benjamin, Hestvik, Ole, Kristoffersen, Yngve, Marcussen, Christian, Mohammad, Rezwan, Mosher, David, Nghiem, Son V., Pedrosa, Maria Teresa, Travaglini, Paola G., Weatherall, Pauline

“…The International Bathymetric Chart of the Arctic Ocean (IBCAO) released its first gridded bathymetric compilation in 1999. The IBCAO bathymetric portrayals…”
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Anatomy of Heinrich Layer 1 and its role in the last deglaciation by Hodell, David A., Nicholl, Joseph A., Bontognali, Tomaso R. R., Danino, Steffan, Dorador, Javier, Dowdeswell, Julian A., Einsle, Joshua, Kuhlmann, Holger, Martrat, Belen, Mleneck‐Vautravers, Maryline J., Rodríguez‐Tovar, Francisco Javier, Röhl, Ursula

“…X‐ray fluorescence (XRF) core scanning and X‐ray computed tomography data were measured every 1 mm to study the structure of Heinrich Event 1 during the last…”
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The unquantified mass loss of Northern Hemisphere marine-terminating glaciers from 2000–2020 by Kochtitzky, William, Copland, Luke, Van Wychen, Wesley, Hugonnet, Romain, Hock, Regine, Dowdeswell, Julian A., Benham, Toby, Strozzi, Tazio, Glazovsky, Andrey, Lavrentiev, Ivan, Rounce, David R., Millan, Romain, Cook, Alison, Dalton, Abigail, Jiskoot, Hester, Cooley, Jade, Jania, Jacek, Navarro, Francisco

“…In the Northern Hemisphere, ~1500 glaciers, accounting for 28% of glacierized area outside the Greenland Ice Sheet, terminate in the ocean. Glacier mass loss…”
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Geophysical constraints on the dynamics and retreat of the Barents Sea ice sheet as a paleobenchmark for models of marine ice sheet deglaciation by Patton, Henry, Andreassen, Karin, Bjarnadóttir, Lilja R., Dowdeswell, Julian A., Winsborrow, Monica C. M., Noormets, Riko, Polyak, Leonid, Auriac, Amandine, Hubbard, Alun

“…Our understanding of processes relating to the retreat of marine‐based ice sheets, such as the West Antarctic Ice Sheet and tidewater‐terminating glaciers in…”
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Intra- and inter-annual variability in dynamic discharge from the Academy of Sciences Ice Cap, Severnaya Zemlya, Russian Arctic, and its role in modulating mass balance by Sánchez-Gámez, Pablo, Navarro, Francisco J., Benham, Toby J., Glazovsky, Andrey F., Bassford, Robin P., Dowdeswell, Julian A.

“…We determined ice velocities for the Academy of Sciences Ice Cap, Severnaya Zemlya, Russian Arctic, during November 2016–November 2017, by feature-tracking 54…”
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Flow and retreat of the Late Quaternary Pine Island-Thwaites palaeo-ice stream, West Antarctica by Graham, Alastair G. C., Larter, Robert D., Gohl, Karsten, Dowdeswell, Julian A., Hillenbrand, Claus-Dieter, Smith, James A., Evans, Jeffrey, Kuhn, Gerhard, Deen, Tara

“…Multibeam swath bathymetry and sub‐bottom profiler data are used to establish constraints on the flow and retreat history of a major palaeo‐ice stream that…”
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Geomorphic signature of Antarctic submarine gullies: Implications for continental slope processes by Gales, Jennifer A., Larter, Robert D., Mitchell, Neil C., Dowdeswell, Julian A.

“…Five quantitatively distinct gully types are identified on the Antarctic continental margin from swath bathymetric data of over 1100 individual features. The…”
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Rapid dynamic activation of a marine-based Arctic ice cap by McMillan, Malcolm, Shepherd, Andrew, Gourmelen, Noel, Dehecq, Amaury, Leeson, Amber, Ridout, Andrew, Flament, Thomas, Hogg, Anna, Gilbert, Lin, Benham, Toby, van den Broeke, Michiel, Dowdeswell, Julian A., Fettweis, Xavier, Noël, Brice, Strozzi, Tazio

“…We use satellite observations to document rapid acceleration and ice loss from a formerly slow‐flowing, marine‐based sector of Austfonna, the largest ice cap…”
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Progress toward globally complete frontal ablation estimates of marine-terminating glaciers by Kochtitzky, William, Copland, Luke, Van Wychen, Wesley, Hock, Regine, Rounce, David R., Jiskoot, Hester, Scambos, Ted A., Morlighem, Mathieu, King, Michalea, Cha, Leo, Gould, Luke, Merrill, Paige-Marie, Glazovsky, Andrey, Hugonnet, Romain, Strozzi, Tazio, Noël, Brice, Navarro, Francisco, Millan, Romain, Dowdeswell, Julian A., Cook, Alison, Dalton, Abigail, Khan, Shfaqat, Jania, Jacek

“…Knowledge of frontal ablation from marine-terminating glaciers (i.e., mass lost at the calving face) is critical for constraining glacier mass balance,…”
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Variability in ice motion and dynamic discharge from Devon Ice Cap, Nunavut, Canada by VAN WYCHEN, WESLEY, DAVIS, JAMIE, COPLAND, LUKE, BURGESS, DAVID O., GRAY, LAURENCE, SHARP, MARTIN, DOWDESWELL, JULIAN A., BENHAM, TOBY J.

“…Feature tracking of approximately annually separated Landsat-7 ETM+ imagery acquired from 1999 to 2010 and speckle tracking of 24-day separated RADARSAT-2…”
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Oceanic heat transport onto the Amundsen Sea shelf through a submarine glacial trough by Walker, Dziga P., Brandon, Mark A., Jenkins, Adrian, Allen, John T., Dowdeswell, Julian A., Evans, Jeff

“…Glaciers which drain the West Antarctic Ice Sheet (WAIS) into the Amundsen Sea are accelerating and thinning rapidly. These observations have been attributed…”
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An Arctic Ocean ice shelf during MIS 6 constrained by new geophysical and geological data by Jakobsson, Martin, Nilsson, Johan, O’Regan, Matthew, Backman, Jan, Löwemark, Ludvig, Dowdeswell, Julian A., Mayer, Larry, Polyak, Leonid, Colleoni, Florence, Anderson, Leif G., Björk, Göran, Darby, Dennis, Eriksson, Björn, Hanslik, Daniela, Hell, Benjamin, Marcussen, Christian, Sellén, Emma, Wallin, Åsa

“…The hypothesis of floating ice shelves covering the Arctic Ocean during glacial periods was developed in the 1970s. In its most extreme form, this theory…”
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Till characteristics, genesis and transport beneath Antarctic paleo-ice streams by Ó Cofaigh, Colm, Evans, Jeffrey, Dowdeswell, Julian A., Larter, Rob D.

“…Marine geophysical data from the Antarctic continental shelf indicate the former presence of ice streams that drained through bathymetric troughs during the…”
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Morphology, sedimentary infill and depositional environments of the Early Quaternary North Sea Basin (56°–62°N) by Ottesen, Dag, Dowdeswell, Julian A., Bugge, Tom

“…The North Sea Basin has been subsiding during the Quaternary and contains hundreds of metres of fill. Seismic surveys (170 000 km2) provide new evidence on…”
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Evolution of subglacial bedforms along a paleo-ice stream, Antarctic Peninsula continental shelf by Ó Cofaigh, Colm, Pudsey, Carol J., Dowdeswell, Julian A., Morris, Peter

“…Geophysical data from the Antarctic Peninsula continental shelf reveal streamlined subglacial bedforms in a cross‐shelf trough. Bedforms exhibit progressive…”
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A historical Southern Ocean climate dataset from whaling ships’ logbooks by Teleti, Praveen R., Rees, W. G., Dowdeswell, Julian A., Wilkinson, Clive

“…Historical ship logbooks provide vital historic meteorological observations in the Southern Ocean, one of the largest climate‐data deficient regions on the…”
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Antarctic ice-shelf advance driven by anomalous atmospheric and sea-ice circulation by Christie, Frazer D. W., Benham, Toby J., Batchelor, Christine L., Rack, Wolfgang, Montelli, Aleksandr, Dowdeswell, Julian A.

“…The disintegration of the eastern Antarctic Peninsula’s Larsen A and B ice shelves has been attributed to atmosphere and ocean warming, and increased mass…”
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Evidence of marine ice-cliff instability in Pine Island Bay from iceberg-keel plough marks by Wise, Matthew G., Dowdeswell, Julian A., Jakobsson, Martin, Larter, Robert D.

“…Plough marks in Pine Island Bay, West Antarctica, left by the keels of drifting icebergs 12,000 years ago provide evidence that marine ice-cliff instability…”
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