A5000981970- Cryospheric studies and observations
- Arctic and Antarctic ice dynamics
- Climate change and permafrost
- Landslides and related hazards
- Climate variability and models
- Methane Hydrates and Related Phenomena
- Winter Sports Injuries and Performance
- Geology and Paleoclimatology Research
- Meteorological Phenomena and Simulations
- Atmospheric and Environmental Gas Dynamics
- Hydrocarbon exploration and reservoir analysis
Dartmouth College
2020-2021
University of Alaska Fairbanks
2018-2020
Abstract Remote sensing observations and climate models indicate that the Greenland Ice Sheet (GrIS) has been losing mass since late 1990s, mostly due to enhanced surface melting from rising summer temperatures. However, in situ observational records of GrIS melt rates over recent decades are rare. Here we develop a record frozen meltwater west percolation zone preserved seven firn cores. Quantifying ice layer distribution as feature percentage (MFP), find significant increases MFP...
Abstract. The mass balance of the Greenland Ice Sheet (GrIS) in a warming climate is critical interest context future sea level rise. Increased melting GrIS percolation zone due to atmospheric over past several decades has led increased loss at lower elevations. Previous studies have hypothesized that this accompanied by precipitation increase, as would be expected from Clausius–Clapeyron relationship, compensating for some melt-induced throughout western GrIS. This study tests hypothesis...
Abstract We present continuous estimates of snow and firn density, layer depth accumulation from a multi-channel, multi-offset, ground-penetrating radar traverse. Our method uses the electromagnetic velocity, estimated waveform travel-times measured at common-midpoints between sources receivers. Previously, common-midpoint experiments on ice sheets have been limited to point observations. completed velocity analysis in upper ~2 m estimate surface average density Greenland Ice Sheet....
Abstract Greenland Ice Sheet (GrIS) albedo has decreased over recent decades, contributing to enhanced surface melt and mass loss. However, it remains unclear whether GrIS darkening is due snow grain size increases, higher concentrations of light‐absorbing impurities (LAIs), or a combination. Here, we assess controls in the western percolation zone using situ albedo, LAI, measurements. We find significant correlation between ( p < 0.01), but not with LAIs. Modeling corroborates that LAI...
Abstract. The mass balance of the Greenland Ice Sheet (GrIS) in a warming climate is critical interest to scientists and general public context future sea-level rise. Increased melting GrIS percolation zone due atmospheric over past several decades has led increased loss at lower elevations. Previous studies have hypothesized that this accompanied by precipitation increase, as would be expected from Clausius-Clapeyron relationship, negating some melt-induced throughout Western GrIS. This...