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Publications

Journal Articles

Versatile Modeling Of Deformation (VMOD) Inversion Framework: Application to 20 Years of Observations at Westdahl Volcano and Fisher Caldera, Alaska, US
Angarita, M.; Grapenthin, R.; Henderson, S.; Christoffersen, M. S.; Anderson, K. R.
Geochemistry, Geophysics, Geosystems, 2024. DOI: 10.1029/2023GC011341

Revealing Elysium Planitia's Young Geologic History: Constraints on Lava Emplacement, Areas, and Volumes
Voigt, J. R. C.; Hamilton, C. W.; Steinbrügge, G.; Christoffersen, M. S.; Nerozzi, S.; Kerber, L.; Holt, J. W.; Carter, L. M.
Journal of Geophysical Research: Planets, 2023. DOI: 10.1029/2023JE007947

Producing 3D radargrams from orbital radar sounding data at Mars: History, results, methods, lessons and plans
Foss, F. J.; Putzig, N. E.; Campbell, B. A.; Levin, S. A.; Perry, M. R.; Holt, J. W.; Christoffersen, M. S.; Smith, I. B.; Morgan, G. A.; Russell, A. T.
Icarus, 2023. DOI: 10.1016/j.icarus.2023.115793

Photogrammetric Monitoring of Rock Glacier Motion Using High-Resolution Cross-Platform Datasets: Formation Age Estimation and Modern Thinning Rates
Meng, T. M.; Aguilar, R.; Christoffersen, M. S.; Petersen, E. I.; Larsen, C. F.; Levy, J. S.; Holt, J. W.
Remote Sensing, 2023. DOI: 10.3390/rs15194779

Evidence of Widespread Volcanic Activity near Hebrus Valles on Mars Revealed by SHARAD
Nerozzi, S.; Christoffersen, M. S.; Holt, J. W.; Hamilton, C. W.
Remote Sensing, 2023. DOI: 10.3390/rs15204967

Comprehensive Radar Mapping of Malaspina Glacier (Sit' Tlein), Alaska - The World's Largest Piedmont Glacier - Reveals Potential for Instability
Tober, B. S.; Holt, J. W.; Christoffersen, M. S.; Truffer, M.; Larsen, C. F.; Brinkerhoff, D. J.; Mooneyham, S. A.
Journal of Geophysical Research: Earth Surface, 2023. DOI: 10.1029/2022JF006898

New Views of the Internal Structure of Planum Boreum from Enhanced 3D Imaging of Mars Reconnaissance Orbiter Shallow Radar Data
Putzig, N. E.; II, F. J. F.; Campbell, B. A.; Holt, J. W.; Perry, M. R.; Smith, I. B.; Russell, A. T.; Nerozzi, S.; Christoffersen, M. S.; Mueller, I. H.; Sava, P. C.
The Planetary Science Journal, 2022. DOI: 10.3847/psj/ac9d3b

The Scientific Legacy of NASA's Operation IceBridge
MacGregor, J. A.; Boisvert, L. N.; Medley, B.; Petty, A. A.; Harbeck, J. P.; Bell, R. E.; Blair, J. B.; Blanchard-Wrigglesworth, E.; Buckley, E. M.; Christoffersen, M. S.; Cochran, J. R.; Csathó, B. M.; De Marco, E. L.; Dominguez, R. T.; Fahnestock, M. A.; Farrell, S. L.; Gogineni, S. P.; Greenbaum, J. S.; Hansen, C. M.; Hofton, M. A.; Holt, J. W.; Jezek, K. C.; Koenig, L. S.; Kurtz, N. T.; Kwok, R.; Larsen, C. F.; Leuschen, C. J.; Locke, C. D.; Manizade, S. S.; Martin, S.; Neumann, T. A.; Nowicki, S. M.; Paden, J. D.; Richter-Menge, J. A.; Rignot, E. J.; Rodríguez-Morales, F.; Siegfried, M. R.; Smith, B. E.; Sonntag, J. G.; Studinger, M.; Tinto, K. J.; Truffer, M.; Wagner, T. P.; Woods, J. E.; Young, D. A.; Yungel, J. K.
Reviews of Geophysics, 2021. DOI: 10.1029/2020RG000712

Quo vadis, Alsek? Climate-driven glacier retreat may change the course of a major river outlet in southern Alaska
Loso, M. G.; Larsen, C. F.; Tober, B. S.; Christoffersen, M. S.; Fahnestock, M.; Holt, J. W.; Truffer, M.
Geomorphology, 2021. DOI: 10.1016/j.geomorph.2021.107701

Sparse subsurface radar reflectors in Hellas Planitia, Mars
Cook, C. W.; Bramson, A. M.; Byrne, S.; Holt, J. W.; Christoffersen, M. S.; Viola, D.; Dundas, C. M.; Goudge, T. A.
Icarus, 2020. DOI: 10.1016/j.icarus.2020.113847

Mio-Pliocene aridity in the south-central Andes associated with Southern Hemisphere cold periods
Amidon, W. H.; Fisher, G. B.; Burbank, D. W.; Ciccioli, P. L.; Alonso, R. N.; Gorin, A. L.; Silverhart, P. H.; Kylander-Clark, A. R. C.; Christoffersen, M. S.
Proceedings of the National Academy of Science, 2017. DOI: 10.1073/pnas.1700327114

Datasets

Fagradalsfjall (Iceland) 2021 Eruption Ground Control Points (GCPs)
Hamilton, C. W.; Óskarsson, B.; Valsson, G.; Christoffersen, M. S.; Voigt, J. C.; Moreland, W.; Hadland, N.; Kubas, A.; Carr, B.
The University of Arizona ReData, 2022. DOI: 10.25422/azu.data.21084865.v1

MRO SHARAD Clutter Simulations Bundle
Christoffersen, M. S.; Holt, J. W.; Kempf, S. D.; O'Connell, J. D.
NASA Planetary Data System, 2021. DOI: 10.17189/nbdh-2k53

IceBridge UAF HF L1B Geolocated Radar Echo Strength Profiles, Version 1
Truffer, M.; Holt, J. W.; Larsen, C. F.; Christoffersen, M. S.; Tober, B. S.
NASA National Snow and Ice Data Center Distributed Active Archive Center, 2021. DOI: 10.5067/Q0AVPHN3250H

IceBridge ARES L1B Geolocated Radar Echo Strength Profiles, Version 1
Holt, J. W.; Truffer, M.; Larsen, C. F.; Christoffersen, M. S.; Tober, B. S.
NASA National Snow and Ice Data Center Distributed Active Archive Center, 2021. DOI: 10.5067/X2H7MP5DBTYP

Abstracts

Revealing Elysium Planitia's Young Geologic History: Constraining Lava Emplacement Styles, Areas, and Volumes
Voigt, J. R. C.; Hamilton, C. W.; Steinbrügge, G.; Christoffersen, M. S.; Nerozzi, S.; Kerber, L.; Holt, J. W.; Carter, L. M.
54th Lunar and Planetary Science Conference, 2023.

No Measurable Inflation-Deflation Cycles Associated with Strombolian Eruptions at Mt. Erebus
Christoffersen, M. S.; Grapenthin, R.; Angarita, M.; Aster, R. C.; Chaput, J.
AGU Fall Meeting Abstracts, 2023.

Deformation at Erebus volcano, Antarctica, from GNSS and seismic data
Grapenthin, R.; Christoffersen, M. S.; Kyle, P.; Aster, R.; Angarita, M.; Wilson, T.; Chaput, J.
XXVIII General Assembly of the International Union of Geodesy and Geophysics, 2023.

The Basal Unit at the North Pole of Mars: Recent Findings and New Opportunities
Nerozzi, S.; Christoffersen, M. S.; Holt, J. W.
53rd Lunar and Planetary Science Conference, 2022.

Calibrated probabilistic modelling of a maybe sometimes marine-terminating glacier
Brinkerhoff, D.; Tober, B.; Devaux-Chupin, V.; Christoffersen, M. S.; Fahnestock, M. A.; Holt, J. W.; Larsen, C.; Loso, M.; Timm, K.; Truffer, M.
AGU Fall Meeting Abstracts, 2022.

Uncovering the Glacially-Obscured Tectonic Structure of the St. Elias Orogen
Tober, B.; Holt, J.; Truffer, M.; Larsen, C.; Christoffersen, M. S.; Gulick, S.
AGU Fall Meeting Abstracts, 2021.

Transient Electromagnetic Soundings of the Malaspina Glacier, Alaska
Christoffersen, M. S.; Holt, J.; Wagner, N.; Tober, B.; Kuehn, T.; Truffer, M.; Devauhttps://doi.org/x-Chupin, V.; Loso, M.; Thomspon, A.
AGU Fall Meeting Abstracts, 2021.

Shallow Seismic Exploration in Proglacial and Supraglacial Debris-Covered Environments, Malaspina and Sourdough Glaciers, Alaska
Kuehn, T.; Holt, J.; Johnson, R.; Nerozzi, S.; Wagner, N.; Meng, T.; Devaux-Chupin, V.; Tober, B.; Christoffersen, M. S.; Truffer, M.; Loso, M.; Thomspon, A.
AGU Fall Meeting Abstracts, 2021.

Saltwater Intrusion in Proglacial Lakes at Malaspina Glacier, Southeast Alaska: Introducing the Worlds Newest Tidewater Glacier
Thompson, A.; Loso, M.; Jones, T.; Truffer, M.; Holt, J.; Devaux-Chupin, V.; Tober, B.; Christoffersen, M. S.; Kuehn, T.; Wagner, N.; Fahnestock, M.; Larsen, C.
AGU Fall Meeting Abstracts, 2021.

Ice-Flow and Surge History of the Malaspina Glacier, Alaska, From Landsat and Sentinel Data, and Autonomous Repeat Image Feature Tracking (autoRIFT).
Devaux-Chupin, V.; Fahnestock, M.; Truffer, M.; Holt, J.; Loso, M.; Jones, T.; Christoffersen, M. S.; Kuehn, T.; Thompson, A.; Tober, B.; Wagner, N.; Brinkerhoff, D.; Larsen, C.
AGU Fall Meeting Abstracts, 2021.

Characterizing Morphology of Lava Tubes in El Malpais National Monument Using Ground Penetrating Radar and LIDAR
Bardabelias, N.; Holt, J.; Christoffersen, M. S.
AGU Fall Meeting Abstracts, 2021.

Characterization and Confirmation of Ground Ice in the Malaspina Forelands, Alaska through Transient Electromagnetic Methods, Satellite Imagery, and Historical Records
Wagner, N.; Holt, J.; Christoffersen, M. S.; Tober, B.; Kuehn, T.; Mooneyham, S.; Truffer, M.; Fahnestock, M.; Devaux-Chupin, V.; Loso, M.; Thomspon, A.
AGU Fall Meeting Abstracts, 2021.

Assessment of Malaspina Glaciers Vulnerability Through Field Data and Modelling
Truffer, M.; Brinkerhoff, D.; Fahnestock, M.; Holt, J.; Larsen, C.; Loso, M.; Timm, K.; Jones, T.; Christoffersen, M. S.; Devaux-Chupin, V.; Kuehn, T.; Wagner, N.; Thompson, A.
AGU Fall Meeting Abstracts, 2021.

The Preservation of Debris-Covered Glaciers on Mars and Earth
Petersen, E. I.; Meng, T. M.; Holt, J. W.; Levy, J. S.; Tober, B.; Christoffersen, M. S.
51st Annual Lunar and Planetary Science Conference, 2020.

Sulphur Creek and Galena Creek, Wyoming: Laboratories for Understanding the Preservation of Debris-Covered Glaciers on Mars
Petersen, E. I.; Meng, T. M.; Holt, J. W.; Levy, J. S.; Tober, B. S.; Christoffersen, M. S.
Seventh International Conference on Mars Polar Science and Exploration, 2020.

Lack of Meltwater May Prevent Radar Sounding Measurements of Supraglacial Debris Thickness in the Martian Midlatitudes
Meng, T. M.; Petersen, E. I.; Christoffersen, M. S.; Tober, B. S.; Holt, J. W.
Seventh International Conference on Mars Polar Science and Exploration, 2020.

Investigating the Potential for Detection of Martian Lava Tubes Using SHARAD
Bardabelias, N. M.; Holt, J. W.; Christoffersen, M. S.; Keszthelyi, L. P.
51st Annual Lunar and Planetary Science Conference, 2020.

A Generalized Surface Clutter Simulator for the Analysis of Spaceborne Radar Sounding Data and Application to the Shallow Radar Instrument on the Mars Reconnaissance Orbiter
Christoffersen, M. S.; Holt, J. W.
51st Annual Lunar and Planetary Science Conference, 2020.

The Transition from Alpine Glacier to Rock Glacier: A Case Study at Sulphur Creek, Wyoming
Petersen, E.; Holt, J. W.; Levy, J.; Meng, T. M.; Tober, B.; Christoffersen, M. S.; Cardenas, B. T.; Stuurman, C. M.
AGU Fall Meeting Abstracts, 2019.

Radar-Derived Ice Thickness and Bed Topography Measurements of the Bering-Bagley Glacier System, Alaska
Tober, B.; Holt, J. W.; Truffer, M.; Christoffersen, M. S.; Larsen, C.
AGU Fall Meeting Abstracts, 2019.

Glaciers on the Brink: New Alaskan Ice thickness Constraints from Operation IceBridge Airborne Radar Sounding
Holt, J. W.; Truffer, M.; Larsen, C. F.; Christoffersen, M. S.; Tober, B.
AGU Fall Meeting Abstracts, 2019.

A new long wavelength airborne sounding radar for temperate glacier thickness measurement with a case study on the Hubbard Glacier, Alaska, USA
Christoffersen, M. S.; Holt, J. W.; Truffer, M.; Larsen, C. F.
EGU General Assembly Abstracts, 2019.

A Mass-Conserving Bed Solution for the Hubbard Glacier from Airborne Radar Data
Christoffersen, M. S.; Holt, J. W.; Catania, G. A.; Truffer, M.; Goliber, S. A.; Larsen, C.
AGU Fall Meeting Abstracts, 2019.

Searching for Subsurface Ice in Hellas Planitia Using SHARAD
Cook, C. W.; Bramson, A. M.; Byrne, S.; Viola, D.; Holt, J. W.; Christoffersen, M. S.; Dundas, C. M.
49th Annual Lunar and Planetary Science Conference, 2018.

A Generalized Clutter Simulation Software for the Analysis of Airborne and Spaceborne Radar Sounding Data
Christoffersen, M. S.; Holt, J. W.; Kempf, S. D.
48th Annual Lunar and Planetary Science Conference, 2017.

Image Classification Workflow Using Machine Learning Methods
Christoffersen, M. S.; Roser, M.; Valadez-Vergara, R.; Fern\'andez-Vega, J. A.; Pierce, S. A.; Arora, R.
AGU Fall Meeting Abstracts, 2016.