A5047491667- Cryospheric studies and observations
- Arctic and Antarctic ice dynamics
- Winter Sports Injuries and Performance
- Methane Hydrates and Related Phenomena
- Geology and Paleoclimatology Research
- Climate change and permafrost
- Landslides and related hazards
- Geophysics and Gravity Measurements
- Meteorological Phenomena and Simulations
- Atmospheric and Environmental Gas Dynamics
- Optical Imaging and Spectroscopy Techniques
- Icing and De-icing Technologies
- Flood Risk Assessment and Management
- Climate variability and models
- Reservoir Engineering and Simulation Methods
- Hydrocarbon exploration and reservoir analysis
- Oceanographic and Atmospheric Processes
- Ocean Acidification Effects and Responses
- Marine and environmental studies
- Water-Energy-Food Nexus Studies
- Coastal and Marine Dynamics
- Coastal and Marine Management
- 3D Modeling in Geospatial Applications
- Fusion materials and technologies
- Polar Research and Ecology
New York University
2002-2025
Courant Institute of Mathematical Sciences
2011-2025
New York University Abu Dhabi
2015-2021
Asiaq Greenland Survey
2016
Abstract. Coupled ice sheet–ocean models capable of simulating moving grounding lines are just becoming available. Such have a broad range potential applications in studying the dynamics marine sheets and tidewater glaciers, from process studies to future projections mass loss sea level rise. The Marine Ice Sheet–Ocean Model Intercomparison Project (MISOMIP) is community effort aimed at designing coordinating series model intercomparison projects (MIPs) for evaluation idealized setups,...
Abstract Jakobshavn Isbræ, a major outlet glacier in Greenland, lost its protective ice shelf 2002 and has been speeding up retreating since. We image grounding line for the first time with terrestrial radar interferometer deployed 2016 detect migration at tidal frequencies. The southern half of develops floating section (3 km × 3 km) that migrates phase difference, to distance 2.8 km, far more than previously expected. attribute kilometer‐scale seawater intrusions, 10–20 cm height, tide....
We present laboratory experiments designed to quantify the stability and energy budget of buoyancy‐driven iceberg capsize. Box‐shaped icebergs were constructed out low‐density plastic, hydrostatically placed in an acrylic water tank containing freshwater uniform density, allowed (or forced, if necessary) The maximum kinetic (translational plus rotational) was ∼15% total released during capsize, radiated surface wave ∼1% released. remaining directly transferred into via hydrodynamic coupling,...
ABSTRACT Time-varying elevations near the calving front of Jakobshavn Isbræ, Greenland were observed with a terrestrial radar interferometer (TRI) in June 2015. An ice block surface dimensions 1370 m × 290 calved on 10 June. TRI-generated time series show that elevation began to increase 65 h prior event, and can be fit simple rotation model. We hypothesize subsurface melting at base floating terminus breaks gravity-buoyancy equilibrium, leading slow subsidence block, its eventual failure.
Abstract Helheim Glacier, in East Greenland, is a major outlet glacier that discharges about 33 Gigatons of ice per year into the ocean. has been undergoing retreat since 2003. Using portable terrestrial radar interferometer scans every 2 min, we characterize its regime tidal flexure at front margin relation to oceanic tide, bed slope, and iceberg calving events. The data reveals presence central ridge acts as fulcrum, with one side moving phase while other out reduced amplitude. We detect...
Abstract The distribution of terrestrial surface runoff to Ilulissat Icefjord, west Greenland, is simulated for the period 2009–13 better emphasize spatiotemporal variability in freshwater flux and link between spikes observed hydrographic conditions at Greenland Ice Sheet tidewater glacier margins. Runoff model simulations were forced with automatic weather station data verified against snow water equivalent depth, equilibrium line altitude, quasi-continuous salinity temperature...
Calving of glacial ice into the ocean from Greenland Ice Sheet is an important component global sea level rise. The calving process itself relatively poorly observed, understood, and modeled; as such, it represents a bottleneck in improving future estimates climate models. We organized pilot project to observe at Helheim Glacier East effort better understand it. During intensive one-week survey, we deployed suite instrumentation including terrestrial radar interferometer, GPS receivers,...
Abstract Southeast Greenland has been a major participant in the ice sheet mass loss over last several decades. Interpreting evolution of glacier fronts requires information about their depth below sea level and ocean thermal forcing, which are incompletely known region. Here, we combine airborne gravity multibeam echo sounding data from National Aeronautics Space Administration's Oceans Melting (OMG) mission with probe fishing boat to reconstruct bathymetry extending margins edges...
In the stratified water column inside Ilulissat ice fjord, oceanic mixing processes can promote an upward transport of heat and salt from subsurface to surface mixed layer. Our objective was map temporal variation vertical fjord by estimating diapycnal rates derived oceanographic data collected during summer research cruises between 2009 2017. We applied Thorpe scale method based on local density inversions. found enhanced in deep at 400 m sill depth with diffusivity reaching a maximum value...
As the loss of West Antarctica's ice sheet threatens to raise sea level and flood world's coasts, scientists must improve projections by understanding physics where glaciers meet ocean.
The United Arab Emirates (UAE) has a long-term policy horizon, the financial capital, and vision for sustainable knowledge-based economy. These characteristics uniquely situate it as potential leader sea-level rise research. Climate science is already growing, at center of UAE's pivot toward climate research burgeoning concern rise. Over 85% population more than 90% nation's infrastructure within few meters present-day sea-level. With its low-lying shallow-sloping geography (about 35 cm per...
Abstract This study uses telemetry and stomach content analysis to describe the ringed seals’ dive pattern prey selection within Kangia (Ilulissat Icefjord), Greenland, where seals are known be exceptionally large genetically distinct. Data from twenty-four ( Pusa hispida ) tagged in Kangia, with satellite relay data loggers 2012 2020, were used patterns. The transmitters active between 28 270 days showed that subadults most frequently dove around 150 m. Adult males this depth, but they also...
Abstract After three years of cold conditions, warm water has returned to Ilulissat Icefjord, home Jakobshavn Isbrae—Greenland’s largest outlet glacier. slowed and thickened since 2016, when waters near the glacier cooled from 3 °C 1.5 °C. Fjord temperatures remained through at least end 2019, but in March 2020, fjord warmed 2.8 As a result warming, we forecast that Isbrae will accelerate resume thinning during 2020 melt season. The fjord’s profound influence on behavior, connectivity...