Search Results - "Hvidberg, Christine"

Accelerating ice flow at the onset of the Northeast Greenland Ice Stream by Grinsted, Aslak, Hvidberg, Christine S., Lilien, David A., Rathmann, Nicholas M., Karlsson, Nanna B., Gerber, Tamara, Kjær, Helle Astrid, Vallelonga, Paul, Dahl-Jensen, Dorthe

“…Mass loss near the ice-sheet margin is evident from remote sensing as frontal retreat and increases in ice velocities. Velocities in the ice sheet interior are…”
Get full text

Ice sheet in peril by Hvidberg, Christine S.

“…Radar data reveal how sensitive the Greenland Ice Sheet is to long-term climatic changes [Also see Report by MacGregor et al. ] Earth's large ice sheets in…”
Get full text

CRYOSPHERE. Ice sheet in peril by Hvidberg, Christine S

Get full text

Ice thickness and volume of the Renland Ice Cap, East Greenland by Koldtoft, Iben, Grinsted, Aslak, Vinther, Bo M., Hvidberg, Christine S.

“…To assess the amount of ice volume stored in glaciers or ice caps, a method to estimate ice thickness distribution is required for glaciers where no direct…”
Get full text

Improved Ice Velocity Measurements with Sentinel-1 TOPS Interferometry by Andersen, Jonas Kvist, Kusk, Anders, Boncori, John Peter Merryman, Hvidberg, Christine Schøtt, Grinsted, Aslak

“…In recent years, the Sentinel-1 satellites have provided a data archive of unprecedented volume, delivering C-band Synthetic Aperture Radar (SAR) acquisitions…”
Get full text

An Integrated View of Greenland Ice Sheet Mass Changes Based on Models and Satellite Observations by Mottram, Ruth, B. Simonsen, Sebastian, Høyer Svendsen, Synne, Barletta, Valentina R., Sandberg Sørensen, Louise, Nagler, Thomas, Wuite, Jan, Groh, Andreas, Horwath, Martin, Rosier, Job, Solgaard, Anne, Hvidberg, Christine S., Forsberg, Rene

“…The Greenland ice sheet is a major contributor to sea level rise, adding on average 0.47 ± 0.23 mm year − 1 to global mean sea level between 1991 and 2015. The…”
Get full text

Effect of an orientation-dependent non-linear grain fluidity on bulk directional enhancement factors by Rathmann, Nicholas M., Hvidberg, Christine S., Grinsted, Aslak, Lilien, David A., Dahl-Jensen, Dorthe

“…Bulk directional enhancement factors are determined for axisymmetric (girdle and single-maximum) orientation fabrics using a transversely isotropic grain…”
Get full text

Periodic outburst floods from an ice-dammed lake in East Greenland by Grinsted, Aslak, Hvidberg, Christine S., Campos, Néstor, Dahl-Jensen, Dorthe

“…We report evidence of four cycles of outburst floods from Catalina Lake, an ice-dammed lake in East Greenland, identified in satellite imagery between…”
Get full text

Crystal orientation fabric anisotropy causes directional hardening of the Northeast Greenland Ice Stream by Gerber, Tamara Annina, Lilien, David A., Rathmann, Nicholas Mossor, Franke, Steven, Young, Tun Jan, Valero-Delgado, Fernando, Ershadi, M. Reza, Drews, Reinhard, Zeising, Ole, Humbert, Angelika, Stoll, Nicolas, Weikusat, Ilka, Grinsted, Aslak, Hvidberg, Christine Schøtt, Jansen, Daniela, Miller, Heinrich, Helm, Veit, Steinhage, Daniel, O’Neill, Charles, Paden, John, Gogineni, Siva Prasad, Dahl-Jensen, Dorthe, Eisen, Olaf

“…The dynamic mass loss of ice sheets constitutes one of the biggest uncertainties in projections of ice-sheet evolution. One central, understudied aspect of ice…”
Get full text

Outlet glacier flow response to surface melt: based on analysis of a high-resolution satellite data set by Larsen, Signe H., Ahlstrøm, Andreas P., Karlsson, Nanna B., Kusk, Anders, Langen, Peter L., Hvidberg, Christine S.

“…The dynamics of the Greenland Ice Sheet are affected by surface meltwater reaching the base of the ice, altering ice contact with the bedrock. Lack of…”
Get full text

Non-linear flow modelling of a Martian Lobate Debris Apron by Schmidt, Louise Steffensen, Hvidberg, Christine Schøtt, Kim, Jung Rack, Karlsson, Nanna Bjørnholt

“…The Martian mid-latitudes contain numerous small water-ice deposits, collectively termed viscous flow features (VFFs). The shape and topography of the deposits…”
Get full text

Greenland 2012 melt event effects on CryoSat-2 radar altimetry by Nilsson, Johan, Vallelonga, Paul, Simonsen, Sebastian B., Sørensen, Louise Sandberg, Forsberg, René, Dahl-Jensen, Dorthe, Hirabayashi, Motohiro, Goto-Azuma, Kumiko, Hvidberg, Christine S., Kjær, Helle A., Satow, Kazuhide

“…CryoSat‐2 data are used to study elevation changes over an area in the interior part of the Greenland Ice Sheet during the extreme melt event in July 2012. The…”
Get full text

Magnitude, frequency and climate forcing of global volcanism during the last glacial period as seen in Greenland and Antarctic ice cores (60–9 ka) by Lin, Jiamei, Svensson, Anders, Hvidberg, Christine S, Lohmann, Johannes, Kristiansen, Steffen, Dahl-Jensen, Dorthe, Steffensen, Jørgen Peder, Rasmussen, Sune Olander, Cook, Eliza, Kjær, Helle Astrid, Vinther, Bo M, Fischer, Hubertus, Stocker, Thomas, Sigl, Michael, Bigler, Matthias, Severi, Mirko, Traversi, Rita, Mulvaney, Robert

“…Large volcanic eruptions occurring in the last glacial period can be detected by their accompanying sulfuric acid deposition in continuous ice cores. Here we…”
Get full text

The effect of a Holocene climatic optimum on the evolution of the Greenland ice sheet during the last 10 kyr by NIELSEN, LISBETH T., AÐALGEIRSDÓTTIR, GUðFINNA, GKINIS, VASILEIOS, NUTERMAN, ROMAN, HVIDBERG, CHRISTINE S.

“…The Holocene climatic optimum was a period 8–5 kyr ago when annual mean surface temperatures in Greenland were 2–3°C warmer than present-day values. However,…”
Get full text

Sixty years of ice form and flow at Camp Century, Greenland by Colgan, William, Jakobsen, Jakob, Solgaard, Anne, Løkkegaard, Anja, Abermann, Jakob, Khan, Shfaqat A., Csatho, Beata, MacGregor, Joseph A., Fausto, Robert S., Karlsson, Nanna, Pedersen, Allan Ø., Andersen, Signe B., Sonntag, John, Hvidberg, Christine S., Ahlstrøm, Andreas P.

“…The magnitude and azimuth of horizontal ice flow at Camp Century, Greenland have been measured several times since 1963. Here, we provide a further two…”
Get full text

Failure strength of glacier ice inferred from Greenland crevasses by Grinsted, Aslak, Rathmann, Nicholas Mossor, Mottram, Ruth, Solgaard, Anne Munck, Mathiesen, Joachim, Hvidberg, Christine Schøtt

“…Ice fractures when subject to stress that exceeds the material failure strength. Previous studies have found that a von Mises failure criterion, which places a…”
Get full text

Basal conditions at Engabreen, Norway, inferred from surface measurements and inverse modelling by SOLGAARD, ANNE M., MESSERLI, ALEXANDRA, SCHELLENBERGER, THOMAS, HVIDBERG, CHRISTINE S., GRINSTED, ASLAK, JACKSON, MIRIAM, ZWINGER, THOMAS, KARLSSON, NANNA B., DAHL-JENSEN, DORTHE

“…Engabreen is an outlet glacier of the Svartisen Ice Cap located in Northern Norway. It is a unique glacier due to the Svartisen Subglacial Laboratory which…”
Get full text

Surface velocity of the Northeast Greenland Ice Stream (NEGIS): assessment of interior velocities derived from satellite data by GPS by Hvidberg, Christine S, Grinsted, Aslak, Dahl-Jensen, Dorthe, Khan, Shfaqat Abbas, Kusk, Anders, Andersen, Jonas Kvist, Neckel, Niklas, Solgaard, Anne, Karlsson, Nanna B, Kjær, Helle Astrid, Vallelonga, Paul

“…The Northeast Greenland Ice Stream (NEGIS) extends around 600 km upstream from the coast to its onset near the ice divide in interior Greenland. Several maps…”
Get full text

Modeling Ice‐Crystal Fabric as a Proxy for Ice‐Stream Stability by Lilien, David A., Rathmann, Nicholas M., Hvidberg, Christine S., Dahl‐Jensen, Dorthe

“…The crystal structure within an ice sheet evolves in response to deformation; hence ice‐crystal fabric records ice‐flow history. However, the complexity of…”
Get full text

Upstream flow effects revealed in the EastGRIP ice core using Monte Carlo inversion of a two-dimensional ice-flow model by Gerber, Tamara Annina, Hvidberg, Christine Schøtt, Rasmussen, Sune Olander, Franke, Steven, Sinnl, Giulia, Grinsted, Aslak, Jansen, Daniela, Dahl-Jensen, Dorthe

“…The Northeast Greenland Ice Stream (NEGIS) is the largest active ice stream on the Greenland Ice Sheet (GrIS) and a crucial contributor to the ice-sheet mass…”
Get full text