Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Andrew Shepherd"'
Publikováno v:
The Cryosphere, Vol 15, Pp 3861-3876 (2021)
Icebergs account for half of all ice loss from Antarctica and, once released, present a hazard to maritime operations. Their melting leads to a redistribution of cold fresh water around the Southern Ocean which, in turn, influences water circulation,
Autor:
Ines Otosaka, Thomas W. K. Armitage, Andrew Shepherd, Robert J. Arthern, Thomas Slater, Malcolm McMillan
Publikováno v:
IEEE Transactions on Geoscience and Remote Sensing. 57:9633-9642
Changes in firn properties affect the shape of pulse-limited radar altimeter echoes acquired over the polar ice sheets. We apply a waveform deconvolution model to CryoSat-2 low-resolution mode echoes to determine the depth distribution of radar backs
Icebergs account for half of all ice loss from Antarctica and, once released, present a hazard to maritime operations. Their melting leads to a redistribution of cold fresh water around the Southern Ocean which, in turn, influences water circulation,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c59e1c8adcced1bea43cd30c49707b6a
https://tc.copernicus.org/preprints/tc-2021-13/
https://tc.copernicus.org/preprints/tc-2021-13/
The A68 iceberg calved from the Larsen C ice shelf on the Antarctic Peninsula in July 2017 and has since been drifting northwards towards South Georgia. Originally covering an area of 5664 sq km, A68A's extent has been reduced to 2606 sq km (as of 23
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3bdbd89cdb5772457077ca6d089e472a
https://doi.org/10.5194/egusphere-egu21-5059
https://doi.org/10.5194/egusphere-egu21-5059
Autor:
Marco Restano, Andrew Shepherd, Pierre Thibaut, Jérôme Benveniste, Monica Roca, Alan Muir, Malcolm McMillan, Américo Ambrózio, Jérémie Aublanc, Roger Escolà
Publikováno v:
The Cryosphere, Vol 13, Pp 709-722 (2019)
The launch of Sentinel-3A in February 2016 represented the beginning of a new long-term series of operational satellite radar altimeters, which will provide Delay-Doppler altimetry measurements over ice sheets for decades to come. Given the potential
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:
Hannes Konrad, Lin Gilbert, Tommaso Parrinello, Malcolm McMillan, Thomas Slater, Andrew Shepherd, Anna E. Hogg, Alan Muir
Publikováno v:
The Cryosphere, Vol 12, Pp 1551-1562 (2018)
We present a new digital elevation model (DEM) of the Antarctic ice sheet and ice shelves based on 2.5×108 observations recorded by the CryoSat-2 satellite radar altimeter between July 2010 and July 2016. The DEM is formed from spatio-temporal fits
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::40f70649bf46543efa31ddc1549b4d35
https://www.the-cryosphere.net/12/1551/2018/
https://www.the-cryosphere.net/12/1551/2018/
Publikováno v:
Hogg, A, Shepherd, A, Gourmelen, N & Engdahl, M 2016, ' Grounding line migration from 1992 to 2011 on Petermann Glacier, North-West Greenland ', Journal of Glaciology . https://doi.org/10.1017/jog.2016.83
We use satellite radar interferometry to investigate changes in the location of the Petermann Glacier grounding line between 1992 and 2011. The grounding line location was identified in 17 quadruple-difference interferograms produced from European Re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7b05e977467fcb2ae385cadedfca4ade
https://eprints.whiterose.ac.uk/109695/1/div-class-title-grounding-line-migration-from-1992-to-2011-on-petermann-glacier-north-west-greenland-div.pdf
https://eprints.whiterose.ac.uk/109695/1/div-class-title-grounding-line-migration-from-1992-to-2011-on-petermann-glacier-north-west-greenland-div.pdf
Autor:
Finnur Pálsson, Aud Venke Sundal, Noel Gourmelen, Sang-Wan Kim, Andrew Shepherd, Helgi Björnsson, J. Park
Publikováno v:
Gourmelen, N, Kim, S W, Shepherd, A, Park, J W, Sundal, A V, Björnsson, H & Pálsson, F 2011, ' Ice velocity determined using conventional and multiple-aperture InSAR ', Earth and Planetary Science Letters, vol. 307, no. 1-2, pp. 156-160 . https://doi.org/10.1016/j.epsl.2011.04.026
We combine conventional Interferometric Synthetic Aperture Radar (InSAR) and Multiple Aperture InSAR (MAI) to determine the ice surface velocity on the Langjokull and Hofsjokull ice caps in Iceland in 1994. This approach allows the velocity of the 20
Publikováno v:
IEEE Transactions on Geoscience and Remote Sensing. 49:1902-1910
We have used surface elevation measurements acquired by the Ice, Cloud,and land Elevation Satellite Geoscience Laser Altimeter System (GLAS) and EnviSAT Radar Altimeter 2 (RA-2) satellite altimeters to assess the elevation change of the 13 700-km2 De