A5071801848- Cryospheric studies and observations
- Arctic and Antarctic ice dynamics
- Winter Sports Injuries and Performance
- Landslides and related hazards
- Climate change and permafrost
- Geology and Paleoclimatology Research
- Methane Hydrates and Related Phenomena
- Polar Research and Ecology
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Icing and De-icing Technologies
- Soil Moisture and Remote Sensing
- Underwater Acoustics Research
- Meteorological Phenomena and Simulations
- Planetary Science and Exploration
- Seismic Waves and Analysis
- Direction-of-Arrival Estimation Techniques
- Advanced SAR Imaging Techniques
- Geophysical Methods and Applications
- Geophysics and Gravity Measurements
- Advanced Image Processing Techniques
- Aerospace Engineering and Energy Systems
- Atmospheric and Environmental Gas Dynamics
- Generative Adversarial Networks and Image Synthesis
- Geological Studies and Exploration
- Speech and Audio Processing
Center for Remote Sensing and Integrated Systems
2016-2025
University of Kansas
2016-2025
University of Washington
2025
Center For Remote Sensing (United States)
2023-2024
Hexcel (United States)
2010
We combined an ensemble of satellite altimetry, interferometry, and gravimetry data sets using common geographical regions, time intervals, models surface mass balance glacial isostatic adjustment to estimate the Earth's polar ice sheets. find that there is good agreement between different methods--especially in Greenland West Antarctica--and combining leads greater certainty. Between 1992 2011, sheets Greenland, East Antarctica, Antarctic Peninsula changed by -142 ± 49, +14 43, -65 26, -20...
Abstract. We present a new bed elevation dataset for Greenland derived from combination of multiple airborne ice thickness surveys undertaken between the 1970s and 2012. Around 420 000 line kilometres data were used, with roughly 70% this having been collected since year 2000, when last comprehensive compilation was undertaken. The combined satellite-derived elevations non-glaciated terrain to produce consistent digital model (DEM) over entire island including across glaciated–ice free...
This paper presents a radar sensor package specifically developed for wide-coverage sounding and imaging of polar ice sheets from variety aircraft. Our instruments address the need reliable remote sensing solution well-suited extensive surveys at low high altitudes capable making measurements with fine spatial temporal resolution. The that we are presenting consists four primary ancillary systems all associated antennas integrated into aircraft to maintain aerodynamic performance. operate...
Shrinking shelf and faster flow Zachariæ Isstrøm, a large glacier in northeast Greenland, began rapid retreat after detaching from stabilizing sill the late 1990s. Mouginot et al. report that between 2002 2014, area covered by glacier's ice shrank 95%; since 1999, rate has nearly doubled; its acceleration increased threefold fall of 2012. These dramatic changes appear to be result combination warmer air ocean temperatures topography floor at head glacier. Rising sea levels should continue...
Several decades of ice-penetrating radar surveys the Greenland and Antarctic ice sheets have observed numerous widespread internal reflections. Analysis this radiostratigraphy has produced valuable insights into sheet dynamics motivates additional mapping these Here we present a comprehensive deep Ice Sheet from airborne data collected over by The University Kansas between 1993 2013. To map efficiently, developed new techniques for predicting reflection slope phase recorded coherent radars....
Abstract The basal thermal state of an ice sheet (frozen or thawed) is important control upon its evolution, dynamics, and response to external forcings. However, this can only be observed directly at sparse boreholes inferred conclusively from the presence subglacial lakes. Here we synthesize spatially extensive inferences Greenland Ice Sheet better constrain state. Existing include outputs eight thermomechanical ice‐flow models included in Sea Level Response Evolution (SeaRISE) effort. New...
Abstract Thwaites Glacier represents 15% of the ice discharge from West Antarctic Ice Sheet and influences a wider catchment 1–3 . Because it is grounded below sea level 4,5 , thought to be susceptible runaway retreat triggered at grounding line (GL) which glacier reaches ocean 6,7 Recent ice-flow acceleration 2,8 front 8–10 GL 11,12 indicate that loss will continue. The relative impacts mechanisms underlying recent are however uncertain. Here we show sustained least 2011 2020 resolve...
Abstract We present Bedmap3, the latest suite of gridded products describing surface elevation, ice-thickness and seafloor subglacial bed elevation Antarctic south 60 °S. Bedmap3 incorporates adds to all post-1950s datasets previously used for Bedmap2, including 84 new aero-geophysical surveys by 15 data providers, an additional 52 million points 1.9 line-kilometres measurement. These efforts have filled notable gaps in major mountain ranges deep interior East Antarctica, along West...
Researchers present the first unambiguous discovery of a 31-km-wide impact crater buried beneath Greenland Ice Sheet.
Abstract Sea ice is generally covered with snow, which can vary in thickness from a few centimeters to >1 m. Snow cover acts as thermal insulator modulating the heat exchange between ocean and atmosphere, it impacts sea-ice growth rates overall thickness, key indicator of climate change polar regions. depth required estimate using freeboard measurements made satellite altimeters. The snow also mechanical load that depresses (snow above sea level). Freeboard depression result flooding...
The flow of ice is temperature-dependent, but direct measurements englacial temperature are sparse. dielectric attenuation radio waves through also and radar sounding sheets sensitive to this attenuation. Here we estimate depth-averaged radar-attenuation rates within the Greenland Ice Sheet from airborne radar-sounding data its associated radiostratigraphy. Using existing empirical relationships between temperature, chemistry, attenuation, then infer temperature. dated radiostratigraphy...
Abstract We document the existence of widespread firn aquifers in an elevation range ~1200–2000 m, high snow‐accumulation regions Greenland ice sheet. use NASA Operation IceBridge accumulation radar data from five campaigns (2010–2014) to estimate a firn‐aquifer total extent 21,900 km 2 . investigate two locations Southeast Greenland, where repeated profiles allow mapping aquifer‐extent and water table variations. In upper part Helheim Glacier rises spring following above‐average summer...
Abstract Radar sounding is a powerful geophysical approach for characterizing the subsurface conditions of terrestrial and planetary ice masses at local to global scales. As result, wide array orbital, airborne, ground-based, in situ instruments, platforms data analysis approaches radioglaciology have been developed, applied or proposed. Terrestrially, airborne radar has used glaciology observe thickness, basal topography englacial layers five decades. More recently, also exploited estimate...
Abstract The National Aeronautics and Space Administration (NASA)’s Operation IceBridge (OIB) was a 13‐year (2009–2021) airborne mission to survey land sea ice across the Arctic, Antarctic, Alaska. Here, we review OIB’s goals, instruments, campaigns, key scientific results, implications for future investigations of cryosphere. primary goal use laser altimetry bridge gap in fine‐resolution elevation measurements from space between conclusion NASA’s Ice, Cloud, Elevation Satellite (ICESat;...
Abstract Ice sheets reshape Earth’s surface. Maps of the landscape formed by past ice are our best tool for reconstructing historic sheet behavior. But models glacier erosion and deposition that explain mapped features relatively untested, without observations landforms developing in situ, postglacial landscapes can provide only qualitative insight into conditions. Here we present first swath radar data collected Antarctica, demonstrating ability technology to map subglacial environment...
The dynamic mass loss of ice sheets constitutes one the biggest uncertainties in projections ice-sheet evolution. One central, understudied aspect flow is how bulk orientation crystal fabric translates to mechanical anisotropy ice. Here we show spatial distribution depth-averaged horizontal and corresponding directional flow-enhancement factors covering a large area Northeast Greenland Ice Stream onset. Our results are based on airborne ground-based radar surveys, ice-core observations,...
Abstract. One of the key components this research has been mapping Antarctic bed topography and ice thickness parameters that are crucial for modelling flow hence predicting future loss ensuing sea level rise. Supported by Scientific Committee on Research (SCAR), Bedmap3 Action Group aims not only to produce new gridded maps international scientific community, but also standardize make available all geophysical survey data points used in producing Bedmap products. Here, we document latest...
Abstract. Between 1993 and 2019, NASA NSF sponsored 26 separate airborne campaigns that surveyed the thickness radiostratigraphy of Greenland Ice Sheet using successive generations coherent VHF radar sounders developed operated by The University Kansas. Most ice-sheet’s internal is composed isochronal reflections record its integrated response to past centennial-to-multi-millennial-scale climatic dynamic events. We previously generated first comprehensive dated 20 these (1993–2013)...
Abstract. Contemporary climate warming over the Arctic is accelerating mass loss from Greenland Ice Sheet through increasing surface melt, emphasizing need to closely monitor its balance in order improve sea-level rise predictions. Snow accumulation largest component of ice sheet's balance, but situ observations thereof are inherently sparse and models difficult evaluate at large scales. Here, we quantify recent rates using ultra-wideband (2–6.5 GHz) airborne snow radar data collected as...
The National Aeronautics and Space Administration (NASA) initiated a program called Operation IceBridge for monitoring critical parts of Greenland Antarctica with airborne LIDARs until ICESat-II is launched in 2016. We have been operating radar instrumentation on the NASA DC-8 P-3 aircraft used LIDAR measurements over Greenland, respectively. package both includes depth sounder/imager at center frequency 195 MHz. During high-altitude missions flown to perform surface-elevation measurements,...
Abstract. Subglacial roughness can be determined at a variety of length scales from radio-echo sounding (RES) data either via statistical analysis topography or inferred basal radar scattering. Past studies have demonstrated that subglacial terrain exhibits self-affine (power law) scaling behaviour, but existing scattering models do not take this into account. Here, using RES northern Greenland, we introduce framework enables consistent integration topographic-scale with the electromagnetic...