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Ice Sheet Topography from a New CryoSat-2 SARIn Processing Chain, and Assessment by Comparison to ICESat-2 over Antarctica

Jérémie Aublanc, Pierre Thibaut, Amandine Guillot, François Boy, Nicolas Picot
2021 Remote Sensing  
In this study, we present a new level-2 processing chain dedicated to the CryoSat-2 Synthetic Aperture Radar Interferometric (SARIn) measurements acquired over ice sheets.  ...  The MAD between CryoSat-2 and ICESat-2 elevation estimates is significantly reduced with the new processing developed, by about 42 %.  ...  Acknowledgments: The authors are grateful to the European Space Agency for providing the CryoSat-2 Baseline-D products, and to the National Aeronautics and Space Administration for providing the ICESat  ... 
doi:10.3390/rs13224508 fatcat:2jli2quknrbrtfquob5goi6fsy

A new digital elevation model of Antarctica derived from CryoSat-2 altimetry

Thomas Slater, Andrew Shepherd, Malcolm McMillan, Alan Muir, Lin Gilbert, Anna E. Hogg, Hannes Konrad, Tommaso Parrinello
2018 The Cryosphere  
recorded by the CryoSat-2 satellite radar altimeter between July 2010 and July 2016.  ...  </strong> We present a new digital elevation model (DEM) of the Antarctic ice sheet and ice shelves based on 2.5<span class="thinspace"></span>×<span class="thinspace"></span>10<sup>8</sup> observations  ...  We acknowledge the European Space Agency (ESA) for the provision of CryoSat-2 data, ESA's Antarcic_Ice Sheet_cci, and the National Snow and Ice Data Center (NSIDC) for the provision of IceBridge airborne  ... 
doi:10.5194/tc-12-1551-2018 fatcat:rg2oxuqaove3jmgny7pj6lirte

The European Space Agency's Earth Explorer Mission CryoSat: measuring variability in the cryosphere

Mark R. Drinkwater, Richard Francis, Guy Ratier, Duncan J. Wingham
2004 Annals of Glaciology  
cover and large terrestrial ice sheets.  ...  It is a dedicated cryospheric mission equipped with a Ku-band SIRAL (SAR/Interferometric Radar ALtimeter), whose primary objectives are to measure the variability and trends in the mass of the Arctic sea-ice  ...  Media Labs are also thanked for their contribution to CryoSat illustrations.  ... 
doi:10.3189/172756404781814663 fatcat:j7mu6xp3vnhwdd22xwxxtuymlq

Regional Assessments of Surface Ice Elevations from Swath-Processed CryoSat-2 SARIn Data

Natalia Havelund Andersen, Sebastian Bjerregaard Simonsen, Mai Winstrup, Johan Nilsson, Louise Sandberg Sørensen
2021 Remote Sensing  
In this study, we derive ice-surface elevations from the swath processing of CryoSat-2 SARIn data, and evaluate the results in several Arctic regions.  ...  The best agreement was found for CryoSat-2 and ICESat-2 over the Helheim region in June 2019. To test the stability of the swath processor, we applied two different coherence thresholds.  ...  ArcticDEM was provided by the Polar Geospatial Center under NSF-OPP awards 1043681, 1559691, and 1542736. NASA's Operation IceBridge and ICESat-2 data were downloaded from NSIDC.  ... 
doi:10.3390/rs13112213 fatcat:iacqgnudqfbefdm4tj5q3lhiqq

Ice Sheet Elevation Change in West Antarctica from Ka‐band Satellite Radar Altimetry

Inès Otosaka, Andrew Shepherd, Malcolm McMillan
2019 Geophysical Research Letters  
In this study, we demonstrate the capability of a new altimeter mission-SARAL/AltiKa-to survey ice in western Antarctica using shorter, 0.8 cm radio waves.  ...  The fast-flowing trunks of the Pine Island and Thwaites Glaciers thinned by 117 ± 10 and 100 ± 20 cm/year, respectively, amounting to a 9% reduction and a 43% increase relative to the 2000s.  ...  Acknowledgments All SARAL/AltiKa data are freely available from AVISO at ftp://avisoftp. cnes.fr/AVISO/, and CryoSat-2 data are freely available from the European Space Agency at ftp://science-pds. cryosat.esa.int  ... 
doi:10.1029/2019gl084271 fatcat:ogfk2rxjkjby7dxd7acjnj4j5i

Four decades of Antarctic surface elevation changes from multi-mission satellite altimetry

Ludwig Schröder, Martin Horwath, Reinhard Dietrich, Veit Helm, Michiel R. van den Broeke, Stefan R. M. Ligtenberg
2019 The Cryosphere  
</strong> We developed a multi-mission satellite altimetry analysis over the Antarctic Ice Sheet which comprises Seasat, Geosat, ERS-1, ERS-2, Envisat, ICESat and CryoSat-2.  ...  A validation with independent elevation changes from in situ and airborne observations as well as a comparison with a firn model proves that the different missions and observation modes have been successfully  ...  We are very grateful for the comments from the anonymous referees, Andrew Shepherd and the editor Etienne Berthier, which significantly helped to improve and clarify the manuscript.  ... 
doi:10.5194/tc-13-427-2019 fatcat:ru75h4l4z5bptid44plfjyv5hm

Validation of satellite altimetry by kinematic GNSS in central East Antarctica

Ludwig Schröder, Andreas Richter, Denis V. Fedorov, Lutz Eberlein, Evgeny V. Brovkov, Sergey V. Popov, Christoph Knöfel, Martin Horwath, Reinhard Dietrich, Alexey Y. Matveev, Mirko Scheinert, Valery V. Lukin
2017 The Cryosphere  
The validation of CryoSat-2 low-resolution mode and SARIn mode data sets documents the progress made from baseline B to C elevation products.  ...  ICESat laser altimetry data are demonstrated to be accurate to a few decimetres over a wide range of surface slopes.  ...  Nilsson and two anonymous reviewers, which helped to improve and to clarify the manuscript. Edited by: E. Berthier Reviewed by: J. N. Nilsson and two anonymous referees  ... 
doi:10.5194/tc-11-1111-2017 fatcat:zmgir5tlnjan7ccd3uiy77vmia

Validation of satellite altimetry by kinematic GNSS in central East Antarctica

Ludwig Schröder, Andreas Richter, Denis V. Fedorov, Lutz Eberlein, Evgeny V. Brovkov, Sergey V. Popov, Christoph Knöfel, Martin Horwath, Reinhard Dietrich, Alexey Y. Matveev, Mirko Scheinert, Valery Lukin
2017 The Cryosphere Discussions  
The validation of Cryosat-2 low-resolution mode and SARIn mode datasets documents the progress made from baseline B to C elevation products.  ...  ICESat laser altimetry data are demonstrated to be accurate to a few decimeters over wide range of surface slopes.  ...  Nilsson and two anonymous reviewers, which helped to improve and to clarify the manuscript. Edited by: E. Berthier Reviewed by: J. N. Nilsson and two anonymous referees  ... 
doi:10.5194/tc-2016-282 fatcat:zyvlmdsztfgpnont4nyzb56dpy

Mass evolution of the Antarctic Peninsula over the last 2 decades from a joint Bayesian inversion

Stephen J. Chuter, Andrew Zammit-Mangion, Jonathan Rougier, Geoffrey Dawson, Jonathan L. Bamber
2022 The Cryosphere  
Here, we use a regionally optimized Bayesian hierarchical model joint inversion approach that combines data from multiple altimetry studies (ENVISAT, ICESat, CryoSat-2 swath), gravimetry (GRACE and GRACE-FO  ...  However, due to the challenges presented by the topography and geometry of the region, there remain large variations in mass balance estimates from conventional approaches and in assessing the relative  ...  We would like to thank Ted Scambos for providing the dDEM and ICESat data used in this study over the northern AP.  ... 
doi:10.5194/tc-16-1349-2022 fatcat:elh7e3qtibcdbft7pfrfhftukm

Validation of airborne and satellite altimetry data by Arctic Truck citizen science

Andreas Stokholm, Sine M. Hvidegaard, Rene Forsberg, Sebastian B. Simonsen
2021 GEUS Bulletin  
Here, a bias in the two records of 89 cm is observed, with the Cryosat-2 observation originating from the subsurface of the ice sheet.  ...  The kinematic-GPS data is then used for satellite validation by inter-comparing it with data from ESA's CryoSat-2 mission.  ...  The operation IceBridge data were downloaded from The national snow and ice data center, and the ESA CryoSat data were downloaded from the ESA data hub.  ... 
doi:10.34194/geusb.v47.5369 fatcat:3gg4pxeip5ej3o7adyujwzcuqm

Marie Byrd Land glacier change driven by inter-decadal climate-ocean variability

Frazer D. W. Christie, Robert G. Bingham, Noel Gourmelen, Eric J. Steig, Rosie R. Bisset, Hamish D. Pritchard, Kate Snow, Simon F. B. Tett
2018 The Cryosphere Discussions  
Along Getz Ice Shelf, grounding-line retreat reduced by 68&amp;thinsp;% during the CryoSat-2 era relative to earlier observations.  ...  Here, we use optical satellite imagery to track grounding-line migration along the Marie Byrd Land Sector between 2003 and 2015, and compare observed changes with ICESat and CryoSat- 2-derived surface  ...  Ligtenberg, and W. van de Berg for sharing their RACMO2 and IMAU-FDM models used in the CryoSat-2 swath processing chain, and J. Williams and S.  ... 
doi:10.5194/tc-2017-263 fatcat:g7w7w54lhncurmks7p626xboom

The Roles of the S3MPC: Monitoring, Validation and Evolution of Sentinel-3 Altimetry Observations

Graham D. Quartly, Francesco Nencioli, Matthias Raynal, Pascal Bonnefond, Pablo Nilo Garcia, Albert Garcia-Mondéjar, Adrian Flores de la Cruz, Jean-Francois Cretaux, Nicolas Taburet, Marie-Laure Frery, Mathilde Cancet, Alan Muir (+13 others)
2020 Remote Sensing  
As the data are used by the Copernicus Services (e.g., CMEMS, Global Land Monitoring Services) and by the research community over open ocean, coastal waters, sea ice, land ice, rivers and lakes, the validation  ...  There are regular routine assessments of the instruments through investigation of telemetered housekeeping data, calibrations over selected sites and comparisons of geophysical retrievals with models,  ...  Acknowledgments: We are all grateful to Sylvie Labroue and Remko Scharroo for their involvement in S3MPC over the years, and were sorry that they did not have the time to contribute to this publication  ... 
doi:10.3390/rs12111763 fatcat:gdqccsmf45c7dmpf7z5u57wzzi

Review of Radar Altimetry Techniques over the Arctic Ocean: Recent Progress and Future Opportunities for Sea Level and Sea Ice Research

Graham D. Quartly, Eero Rinne, Marcello Passaro, Ole B. Andersen, Salvatore Dinardo, Sara Fleury, Kevin Guerreiro, Amandine Guillot, Stefan Hendricks, Andrey A. Kurekin, Felix L. Müller, Robert Ricker (+2 others)
2018 The Cryosphere Discussions  
</strong> There are numerous needs for monitoring sea level and sea ice in the Arctic, ranging from concern about changes in ice cover being both an indicator and a driver of long-term climate change to  ...  The review finishes with a look ahead to how new technologies, analyses and understanding may be expected to improve the monitoring in this critical environment.</p>  ...  New missions with new capabilities The Envisat radar altimeter RA-2 not only worked at Ku-band but also at S-band, which was exploited for ice studies over Antarctica and Greenland (Legresy et al., 2005  ... 
doi:10.5194/tc-2018-148 fatcat:nkgpjm27r5bexiopyp4anbb3di

Retrieving Sea Level and Freeboard in the Arctic: A Review of Current Radar Altimetry Methodologies and Future Perspectives

Graham D. Quartly, Eero Rinne, Marcello Passaro, Ole B. Andersen, Salvatore Dinardo, Sara Fleury, Amandine Guillot, Stefan Hendricks, Andrey A. Kurekin, Felix L. Müller, Robert Ricker, Henriette Skourup (+1 others)
2019 Remote Sensing  
Subsequently, corrections have to be applied for various surface and atmospheric effects before making a comparison with a reference level.  ...  Radar returns may be from all ocean, all sea ice, or a mixture of the two, so the first task is the determination of which surface and then an interpretation of the signal to give range.  ...  [52] to lead detection from CryoSat-2 and is still currently used in the CPOM and ESA level 2 processing chains [49] .  ... 
doi:10.3390/rs11070881 fatcat:f6p4xrertvcafe4uhpsb7i4fcm

Altimetry for the future: Building on 25 years of progress

Saleh Abdalla, Abdolnabi Abdeh Kolahchi, Susheel Adusumilli, Suchandra Aich Bhowmick, Eva Alou-Font, Laiba Amarouche, Ole Baltazar Andersen, Helena Antich, Lotfi Aouf, Brian Arbic, Thomas Armitage, Sabine Arnault (+349 others)
2021 Advances in Space Research  
A fifth section covers the key observations that altimeters provide and their potential complements, from other Earth observation measurements to in situ data.  ...  " Ocean, extending the frontier from biogeochemistry to marine ecology.  ...  Currently, there are clearly new opportunities for improved understanding afforded by the complementary observations from multiple altimeters over polar oceans (CryoSat-2, ICESat-2) or part of it (Sentinel  ... 
doi:10.1016/j.asr.2021.01.022 fatcat:zgsllfqrgnfyporr7rs2dgb77e
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