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Polar Airborne Observations Fill Gap in Satellite Data

Lora Koenig, Seelye Martin, Michael Studinger, John Sonntag
2010 EOS  
IceBridge will improve modeling efforts and knowledge of the contribution of the Greenland and Antarctic ice sheets to sea level rise.  ...  Data collected by IceBridge will yield a threedimensional view of ice sheets and sea ice as they change.  ...  In October 2009, IceBridge continued with a series of 21 DC-8 science flights over the Antarctic Peninsula, West Antarctica, and Antarctic sea ice.  ... 
doi:10.1029/2010eo380002 fatcat:bptrtrql6fg73ndjke7o6xbxpe

The scientific legacy of NASA's Operation IceBridge

Joseph A. MacGregor, Linette N. Boisvert, Brooke Medley, Alek A. Petty, Jeremy P. Harbeck, Robin E. Bell, J. Bryan Blair, Edward Blanchard‐Wrigglesworth, Ellen M. Buckley, Michael S. Christoffersen, James. R. Cochran, Beáta M. Csathó (+34 others)
2021 Reviews of Geophysics  
Using 15 different aircraft, OIB conducted 968 science flights, of which 42% were repeat surveys of land ice, 42% were surveys of previously unmapped terrain across the Greenland and Antarctic ice sheets  ...  was a 13-year (2009-2021) airborne mission to survey land and sea ice across the Arctic, Antarctic, and Alaska.  ...  Acknowledgments The authors thank the innumerable pilots, aircraft mechanics and safety  ... 
doi:10.1029/2020rg000712 fatcat:w7jvgqgqordr7ioao3cxgkheie

Low-frequency radar sounding of ice in East Antarctica and southern Greenland

J. Mouginot, E. Rignot, Y. Gim, D. Kirchner, E. Le Meur
2014 Annals of Glaciology  
Comparisons with higher-frequency radar data indicate an accuracy of ±55 m for ice-thickness measurements in Greenland and ±25 m in Antarctica.  ...  We also estimate ice thickness of the Qassimiut lobe in southwest Greenland, where few ice-thickness measurements have been made, demonstrating that WISE penetrates in strongly scattering environments.  ...  Part of the development of WISE has been funded by NASA's Planetary Instruments Definition and Development Program (PIDDP).  ... 
doi:10.3189/2014aog67a089 fatcat:2zevzekdpzhkjmzljpj54c2iz4

Distribution and dynamics of Greenland subglacial lakes

J. S. Bowling, S. J. Livingstone, A. J. Sole, W. Chu
2019 Nature Communications  
Few subglacial lakes have been identified beneath the Greenland Ice Sheet (GrIS) despite extensive documentation in Antarctica, where periodic release of water can impact ice flow.  ...  Here we present an ice-sheet-wide survey of Greenland subglacial lakes, identifying 54 candidates from airborne radio-echo sounding, and 2 lakes from ice-surface elevation changes.  ...  Rippin for sharing bed roughness data for the production of Fig. 5d . We would also like to thank A. Leeson for many helpful and constructive conversations.  ... 
doi:10.1038/s41467-019-10821-w pmid:31243282 pmcid:PMC6594964 fatcat:jcdhixmierdxhiwfuiengrjayu

Compensating Changes in the Penetration Depth of Pulse-Limited Radar Altimetry Over the Greenland Ice Sheet

Thomas Slater, Andrew Shepherd, Malcolm McMillan, Thomas W. K. Armitage, Ines Otosaka, Robert J. Arthern
2019 IEEE Transactions on Geoscience and Remote Sensing  
We apply a waveform deconvolution model to CryoSat-2 low-resolution mode echoes to determine the depth-distribution of radar backscattering across the Greenland ice sheet.  ...  Changes in firn properties affect the shape of pulselimited radar altimeter echoes acquired over the polar ice sheets.  ...  Across the interior of the Greenland ice sheet, CryoSat-2 acquires measurements in low-resolution mode (LRM), where it operates as a traditional pulse-limited altimeter illuminating a ground footprint  ... 
doi:10.1109/tgrs.2019.2928232 fatcat:i6bvb7rw4jgqpluxuibquegti4

An ultra-wideband, microwave radar for measuring snow thickness on sea ice and mapping near-surface internal layers in polar firn

Ben Panzer, Daniel Gomez-Garcia, Carl Leuschen, John Paden, Fernando Rodriguez-Morales, Aqsa Patel, Thorsten Markus, Benjamin Holt, Prasad Gogineni
2013 Journal of Glaciology  
The Center for Remote Sensing of Ice Sheets (CReSIS) has developed an ultra-wideband, microwave radar capable of operation on long-endurance aircraft to characterize the thickness of snow over sea ice.  ...  From 2009 to 2012, CReSIS successfully operated the radar on the NASA P-3B and DC-8 aircraft to collect data on snow-covered sea ice in the Arctic and Antarctic for NASA Operation IceBridge.  ...  ACKNOWLEDGEMENTS We acknowledge the positive and constructive feedback of the two reviewers.  ... 
doi:10.3189/2013jog12j128 fatcat:mxtc43rlrfgkxj2n2fbtjdiuoe

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
2017 The Cryosphere Discussions  
We present a new Digital Elevation Model (DEM) of the Antarctic ice sheet and ice shelves based on 2.5&amp;thinsp;&amp;times;&amp;thinsp;10<sup>8</sup> observations recorded by the CryoSat-2 satellite  ...  Altogether, 94&amp;thinsp;% of the grounded ice sheet and 98&amp;thinsp;% of the floating ice shelves are observed, and the remaining grid cells North of 88&amp;deg;&amp;thinsp;S are interpolated using  ...  of locations across the Antarctic ice sheet and ice shelves.  ... 
doi:10.5194/tc-2017-223 fatcat:jx6r54hykbastm3o46csfqcrdi

Estimating Penetration-Related X-Band InSAR Elevation Bias: A Study over the Greenland Ice Sheet

Sahra Abdullahi, Birgit Wessel, Martin Huber, Anna Wendleder, Achim Roth, Claudia Kuenzer
2019 Remote Sensing  
Accelerating melt on the Greenland ice sheet leads to dramatic changes at a global scale.  ...  which was performed at two test sites on the Northern Greenland ice sheet.  ...  Acknowledgments: The authors would like to thank the anonymous reviewers for many constructive comments on the manuscript. Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/rs11242903 fatcat:lir4wpndfjc3lhwkkh7uax3yua

EXTRACTION OF ICE SHEET LAYERS FROM TWO INTERSECTED RADAR ECHOGRAMS NEAR NEEM ICE CORE IN GREENLAND

S. Xiong, J.-P. Muller
2016 The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences  
Accumulation of snow and ice over time result in ice sheet layers.  ...  In this study, we examine a study site where folded ice occurs in the internal ice sheet south of the North Greenland Eemian ice drilling (NEEM) station, where two intersected radar echograms acquired  ...  ACKNOWLEDGEMENTS We acknowledge support of the CSC and the UCL MAPS Dean prize for the first author. We would also like to thank Anthony Freeman (JPL) for helpful comments.  ... 
doi:10.5194/isprs-archives-xli-b7-585-2016 fatcat:ivoykiwqgvbljdpr2yeacxrn5q

Improved GNSS-R bi-static altimetry and independent digital elevation models of Greenland and Antarctica from TechDemoSat-1

Jessica Cartwright, Christopher J. Banks, Meric Srokosz
2020 The Cryosphere  
A median bias of under 10 m and root-mean-square errors (RMSEs) of under 53 m for the Antarctic and 166 m for Greenland are obtained, as compared to existing DEMs.  ...  Improved digital elevation models (DEMs) of the Antarctic and Greenland ice sheets are presented, which have been derived from Global Navigation Satellite Systems-Reflectometry (GNSS-R).  ...  The authors would like to thank Estel Cardellach and one anonymous reviewer for their comments and suggestions for this study. Financial support.  ... 
doi:10.5194/tc-14-1909-2020 fatcat:bwz5es6nxrdaremcuyxwgfan3q

Two-Frequency Radar Experiments for Sounding Glacier Ice and Mapping the Topography of the Glacier Bed

Kenneth C. Jezek, Sivaprasad Gogineni, X. Wu, E. Rodriguez, Fernando Rodriguez-Morales, A. Hoch, Anthony Freeman, John G. Sonntag
2011 IEEE Transactions on Geoscience and Remote Sensing  
We performed airborne experiments using 150-and 6 450-MHz radars to measure ice thickness on the Greenland ice 7 sheet.  ...  We found that surface 12 clutter was minimal for either frequency when operated at low 13 aircraft elevations (500 m above the ice sheet surface) or over 14 benign regions of the ice sheet.  ...  SUMMARY 436 We have successfully retrieved ice-thickness measurements 437 using 150-and 450-MHz airborne radar data collected over the 438 Greenland ice sheet.  ... 
doi:10.1109/tgrs.2010.2071387 fatcat:tmrxdbbcerenlgyayx4bkgdz2a

Airborne fine-resolution UHF radar: an approach to the study of englacial reflections, firn compaction and ice attenuation rates

Cameron Lewis, Sivaprasad Gogineni, Fernando Rodriguez-Morales, Ben Panzer, Theresa Stumpf, John Paden, Carl Leuschen
2015 Journal of Glaciology  
We have built and operated an ultra-wideband UHF pulsed-chirp radar for measuring firn stratigraphy from airborne platforms over the ice sheets of Greenland and West Antarctica.  ...  The radar is capable of mapping interfaces with reflection coefficients as low as −80 dB near the firn–ice transition and as low as −64 dB at depths of 600 m.  ...  Collins in editing and formatting the manuscript.  ... 
doi:10.3189/2015jog14j089 fatcat:j6z2qrcyc5fq7hdzjgaxo74gsa

A high-resolution bedrock map for the Antarctic Peninsula

M. Huss, D. Farinotti
2014 The Cryosphere  
</strong> Assessing and projecting the dynamic response of glaciers on the Antarctic Peninsula to changed atmospheric and oceanic forcing requires high-resolution ice thickness data as an essential geometric  ...  Our approach is constrained with all available thickness measurements from Operation IceBridge and gridded ice flow speeds for the entire study region.  ...  We thank A. Cook for the high-resolution DEM and the glacier catchments. Operation IceBridge is acknowledged for their many thickness measurements being one of the backbones of this study.  ... 
doi:10.5194/tc-8-1261-2014 fatcat:mjecbhvl4jfozplfifeu5mcz5q

Open Access Data in Polar and Cryospheric Remote Sensing

Allen Pope, W. Rees, Adrian Fox, Andrew Fleming
2014 Remote Sensing  
The paper concludes with a discussion of open data access within polar and cryospheric sciences, considering trends in data discoverability, access, sharing and use.  ...  today and the prospects for future data collection; in all cases, with a focus on data that are openly accessible.  ...  This has resulted in SAR acquisitions over large parts of the Arctic and Antarctic on a regular basis.  ... 
doi:10.3390/rs6076183 fatcat:mkbjfuctzrdptdh7poxyhars6i

Bed topography of Jakobshavn Isbræ, Greenland, and Byrd Glacier, Antarctica

S. Gogineni, J.-B. Yan, J. Paden, C. Leuschen, J. Li, F. Rodriguez-Morales, D. Braaten, K. Purdon, Z. Wang, W. Liu, J. Gauch
2014 Journal of Glaciology  
This paper presents the bed topography of Jakobshavn Isbræ, Greenland, and Byrd Glacier, Antarctica, derived from sounding these glaciers with high-sensitivity radars.  ...  At Byrd Glacier, we found ~3.62 km thick ice, as well as a subglacial trench ~3.05 km below sea level.  ...  of Kansas.  ... 
doi:10.3189/2014jog14j129 fatcat:hmv6pd6rcfaszjlx2jo64plsde
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