Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Andrew Shepherd"'
Autor:
Alan Muir, Julienne Stroeve, Thomas W. K. Armitage, Isobel Lawrence, Michel Tsamados, Andrew Shepherd, Andy Ridout, Salvatore Dinardo, R. Tilling
Publikováno v:
Advances in Space Research. 68:711-723
In February 2016 and April 2018 the European Space Agency launched the Sentinel-3A and 3B satellites respectively, as part of the European Commission’s multi-satellite Copernicus Programme. Here we process Sentinel-3A waveform data to estimate Arct
Publikováno v:
Advances in Space Research. 68:724-731
Over the past two decades, Antarctic ice shelves have retreated, thinned and suffered catastrophic collapse. In this study we extended the 25-year long record of ice shelf thickness change in Antarctica, from 2010 to 2017. In the Amundsen Sea Sector
Publikováno v:
Journal of Geophysical Research: Oceans. 124:7473-7485
Autor:
Kate Briggs, Malcolm McMillan, Thomas Slater, Lin Gilbert, Anna E. Hogg, Aud Venke Sundal, Hannes Konrad, M. Engdahl, Andrew Shepherd, Alan Muir
Publikováno v:
Geophysical Research Letters. 46:8174-8183
Fluctuations in Antarctic Ice Sheet elevation and mass occur over a variety of time scales, owing to changes in snowfall and ice flow. Here we disentangle these signals by combining 25 years of satellite radar altimeter observations and a regional cl
Autor:
E. Maestroni, Michele Scagliola, Andrew Shepherd, Tania Casal, Tommaso Parrinello, Stefano Badessi, Malcolm Davidson, Marco Fornari, Jerome Bouffard
Publikováno v:
Advances in Space Research. 62:1178-1190
CryoSat-2 is a satellite of the European Space Agency that was launched in April 2010. It is intended to monitor changes in the thickness of the marine ice, floating in the polar oceans, and to measure variations in the thickness of the vast ice shee
Autor:
Andrew Shepherd, Alan Muir, Steven Baker, Albert Garcia-Mondejar, Luca Foresta, Monica Roca, Mark R. Drinkwater, Maria-José Escorihuela, Noel Gourmelen
Publikováno v:
Gourmelen, N, Escorihuela, M, Shepherd, A, Foresta, L, Muir, A, Garcia-Mondejar, A, Roca, M, Baker, S & Drinkwater, M R 2018, ' CryoSat-2 swath interferometric altimetry for mapping ice elevation and elevation change ', Advances in Space Research, vol. 62, no. 6, pp. 1226-1242 . https://doi.org/10.1016/j.asr.2017.11.014
For more than 25 years, satellite radar altimetry has provided continuous information on the state of the cryosphere and on its contribution to global sea-level rise. The technique typically delivers maps of ice-sheet elevation and elevation change w
Autor:
Brice Noël, Alan Muir, Stefan R. M. Ligtenberg, Lin Gilbert, Malcolm McMillan, Andreas Groh, Anna E. Hogg, Peter Kuipers Munneke, Kate Briggs, Andrew Shepherd, Amber Leeson, Michiel R. van den Broeke, Thomas W. K. Armitage, Willem Jan van de Berg, Martin Horwath
Publikováno v:
Geophysical Research Letters. 43:7002-7010
We map recent Greenland Ice Sheet elevation change at high spatial (5 km) and temporal (monthly) resolution using CryoSat-2 altimetry. After correcting for the impact of changing snowpack properties associated with unprecedented surface melting in 20
Autor:
Malcolm McMillan, Michiel R. van den Broeke, Anna E. Hogg, Amber Leeson, Toby Benham, Brice Noël, Lin Gilbert, Julian A. Dowdeswell, Amaury Dehecq, Noel Gourmelen, Thomas Flament, Tazio Strozzi, Xavier Fettweis, Andrew Shepherd, Andrew Ridout
Publikováno v:
Mcmillan, M, Shepherd, A, Gourmelen, N, Dehecq, A, Leeson, A, Ridout, A, Flament, T, Hogg, A, Gilbert, L, Benham, T, Van Den Broeke, M, Dowdeswell, J A, Fettweis, X, No??l, B & Strozzi, T 2015, ' Rapid dynamic activation of a marine-based Arctic ice cap : Ice cap dynamic activation ', Geophysical Research Letters, vol. 41, no. 24, pp. 8902–8909 . https://doi.org/10.1002/2014GL062255
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 in the Eurasian Arctic. During the past two decades, the sector ice discharge has increased
Autor:
Malcolm McMillan, Aud Venke Sundal, Kate Briggs, Anna E. Hogg, Duncan J. Wingham, Andrew Shepherd, Alan Muir, Andrew Ridout
Publikováno v:
Geophysical Research Letters. 41:3899-3905
We use 3 years of Cryosat-2 radar altimeter data to develop the first comprehensive assessment of Antarctic ice sheet elevation change. This new data set provides near-continuous (96%) coverage of the entire continent, extending to within 215 km of t
Autor:
Malcolm McMillan, Robert Cullen, Hugh F. J. Corr, Andrew Ridout, Seymour W. Laxon, Andrew Shepherd
Publikováno v:
Geophysical Research Letters. 40:4321-4327
We analyze data acquired by the CryoSat-2 interferometric radar altimeter and demonstrate its novel capability to track topographic features on the Antarctic Ice Sheet. We map the perimeter and depth of a 260 km2 surface depression above an Antarctic