A5012140713- Cryospheric studies and observations
- Winter Sports Injuries and Performance
- Climate change and permafrost
- Arctic and Antarctic ice dynamics
- Landslides and related hazards
- Geology and Paleoclimatology Research
- Methane Hydrates and Related Phenomena
- Atmospheric and Environmental Gas Dynamics
- Ionosphere and magnetosphere dynamics
- Polar Research and Ecology
- Solar and Space Plasma Dynamics
- Atmospheric Ozone and Climate
- Geological Studies and Exploration
- Climate variability and models
- Remote Sensing and LiDAR Applications
- Geomagnetism and Paleomagnetism Studies
- Seismology and Earthquake Studies
- Planetary Science and Exploration
- Smart Materials for Construction
- Underwater Vehicles and Communication Systems
- Microbial Community Ecology and Physiology
- Meteorological Phenomena and Simulations
- Icing and De-icing Technologies
- Advanced Optical Sensing Technologies
- earthquake and tectonic studies
Goddard Institute for Space Studies
2008-2024
Geological Survey of Denmark and Greenland
2018-2024
Integra (United States)
2023-2024
Columbia University
2005-2024
University of Colorado Boulder
2002-2023
Cooperative Institute for Research in Environmental Sciences
2022-2023
Pomona College
2023
Integra (Russia)
2023
NewClimate Institute
2023
Pennsylvania State University
2015-2022
The Programme for Monitoring of the Greenland Ice Sheet (PROMICE) has been measuring climate and ice sheet properties since 2007. Currently, PROMICE automatic weather station network includes 25 instrumented sites in Greenland. Accurate measurements surface near-surface atmospheric conditions a changing are important reliable present future assessment changes Sheet. Here, we vision, methodology, each link production chain obtaining sharing quality-checked data. In this paper, mainly focus on...
Abstract Ice loss from the Greenland ice sheet is one of largest sources contemporary sea-level rise (SLR). While process-based models place timescales on Greenland’s deglaciation, their confidence obscured by model shortcomings including imprecise atmospheric and oceanic couplings. Here, we present a complementary approach resolving disequilibrium with climate constrained satellite-derived bare-ice extent, tidewater sector flow discharge surface mass balance data. We find that imbalance...
Abstract A clean hot-water drill was used to gain access Subglacial Lake Whillans (SLW) in late January 2013 as part of the Ice Stream Access Research Drilling (WISSARD) project. Over 3 days, we deployed an array scientific tools through SLW borehole: a downhole camera, conductivity–temperature–depth (CTD) probe, Niskin water sampler, situ filtration unit, three different sediment corers, geothermal probe and geophysical sensor string. Our observations confirm existence subglacial reservoir...
The geothermal heat flux is a critical thermal boundary condition that influences the melting, flow, and mass balance of ice sheets, but measurements this parameter are difficult to make in ice-covered regions. We report first direct measurement into base West Antarctic Ice Sheet (WAIS), below Subglacial Lake Whillans, determined from gradient conductivity sediment under lake. at site 285 ± 80 mW/m(2), significantly higher than continental regional averages estimated for using geophysical...
Abstract. We present a 1986 through March 2020 estimate of Greenland Ice Sheet ice discharge. Our data include all discharging that flows faster than 100 m yr−1 and are generated an automatic adaptable method, as opposed to conventional handpicked gates. position gates near the present-year termini problematic bed topography (ice thickness) values where necessary. In addition using annual time-varying thickness, our time series uses velocity maps begin with sparse spatial temporal coverage...
ABSTRACT We present a novel application of the Kinect™, an input device designed for Microsoft® Xbox 360® video game system. The can be used by Earth scientists as low‐cost, high‐resolution, short‐range 3D/4D camera imaging system producing data similar to terrestrial light detection and ranging (LiDAR) sensor. Kinect contains structured emitter, infrared (the combination these two produce distance image), visual wavelength camera, three‐axis accelerometer, four microphones. cost is ~ US...
Abstract. Greenland runoff, from ice mass loss and increasing rainfall, is increasing. That as discharge, impacts the physical, chemical, biological properties of adjacent fjords. However, where when discharge occurs not readily available in an open database. Here we provide data sets high-resolution hydrologic outlets, basins, streams, well a daily 1958 through 2019 time series liquid water for each outlet. The include 24 507 marginal outlets upstream basins 29 635 land coast derived 100 m...
Discharge of surface-derived meltwater at the submerged base Greenland's marine-terminating glaciers creates subglacial discharge plumes that rise along glacier/ocean interface. These impact submarine melting, calving, and fjord circulation. Observations plume properties dynamics are challenging due to their proximity calving edge glaciers. Therefore, date information on these has been largely derived from models. Here we present temperature, salinity, velocity data collected in a surfaced...
The Sentinel Application Platform (SNAP) architecture facilitates Earth Observation data processing. In this work, we present results from a new Snow Processor for SNAP. We also describe physical principles behind the developed snow property retrieval technique based on analysis of Ocean and Land Colour Instrument (OLCI) onboard Sentinel-3A/B measurements over clean polluted fields. Using OLCI spectral reflectance in range 400–1020 nm, derived important properties such as broadband albedo,...
Abstract. We present a 1986 through 2017 estimate of Greenland Ice Sheet ice discharge. Our data include all discharging that flows faster than 100 m yr−1 and are generated an automatic adaptable method, as opposed to conventional hand-picked gates. position gates near the present-year termini problematic bed topography (ice thickness) values where necessary. In addition using annual time-varying thickness, our time series uses velocity maps begin with sparse spatial temporal coverage end...
Abstract. The mass of the Greenland ice sheet is declining as gain from snow accumulation exceeded by loss surface meltwater runoff, marine-terminating glacier calving and submarine melting, basal melting. Here we use input–output (IO) method to estimate change 1840 through next week. Surface balance (SMB) gains losses come a semi-empirical SMB model 1985 three regional climate models (RCMs; HIRHAM/HARMONIE, Modèle Atmosphérique Régional – MAR, RACMO Regional Atmospheric Climate MOdel) 1986...
Abstract The Greenland ice sheet has been one of the largest sources sea-level rise since early 2000s. However, basal melt not included explicitly in assessments ice-sheet mass loss so far. Here, we present first estimate total and regional produced by recent change through time. We find that sheet’s production is 21.4 +4.4/−4.0 Gt per year, generated friction responsible for about half this volume. melting increased 2.9 ± 5.2 during decade As Arctic warms, anticipate will continue to...
Abstract We present a new approach to account for the influence of subglacial topography on geothermal heat flux beneath Greenland and Antarctic ice sheets. first establish simple empirical proportionality between local topographic relief within given radius, based synthesis existing observations these properties elsewhere Earth. This analysis essentially yields high‐pass filter that can be readily applied large‐scale fields render them consistent with known topography. avoids both geometric...
Abstract. We present the Programme for Monitoring of Greenland Ice Sheet (PROMICE) Velocity product (https://doi.org/10.22008/promice/data/sentinel1icevelocity/greenlandicesheet, Solgaard and Kusk, 2021), which is a time series ice velocity mosaics spanning September 2016 through to present. The based on Sentinel-1 synthetic aperture radar data has 500 m grid spacing. A new mosaic available every 12 d spans two consecutive cycles (24 d). made within ∼ 10 last acquisition includes all...
Global warming accelerates melting of glaciers and increases the supply meltwater associated inorganic particles, nutrients, organic matter to adjacent coastal seas, but ecosystem impact is poorly resolved quantified. When delivered by glacial rivers, potential could be a reduction in light nutrient availability for primary producers while supplying allochthonous carbon heterotrophic processes, thereby tipping net community metabolism toward heterotrophy. To test this hypothesis, we...
Nitric oxide density in the lower thermosphere (97–150 km) has been measured from polar‐orbiting Student Oxide Explorer (SNOE) satellite as a function of latitude, longitude, and altitude for 2 1/2 year period 11 March 1998 until 30 September 2000. The observations show that maximum occurs near 106–110 km is highly variable. nitric at low latitudes correlates well with solar soft X‐ray irradiance (2–7 nm), indicating it X‐rays produce thermospheric midlatitudes. produced auroral (60°–70°...
Abstract Several hundred visible and thermal infrared satellite images of Antarctica’s southeast Amundsen Sea from 1986 to 2011, combined with aerial observations in 2009, show a strong inverse relation between prominent curvilinear surface depressions the underlying basal morphology outer Pine Island Glacier ice shelf. Shipboard measurements near calving front reveal positive temperature, salinity current anomalies indicative melt-laden, deep-water outflows above larger channel termini....
This paper illustrates the components, capabilities, and some characteristic applications of Woods Hole Oceanographic Institution Jetyak - a small autonomous surface vehicle (ASV) designed for collection oceanographic data from shallow or dangerous waters. The is result custom modifications to Mokai jet-powered kayak, including an A-frame sea chest installation instrumentation, servo-driven controls Ardupilot autopilot operation, onboard computer instrument control logging, radios wireless...
Abstract. We compile and analyze all available geothermal heat flow measurements collected in around Greenland into a new database of 419 sites generate an accompanying spatial map. This includes 290 previously reported by the International Heat Flow Commission (IHFC), for which we now standardize measurement metadata quality. also 129 sites, have not been IHFC. These consist 88 offshore 41 onshore measurements, 24 are subglacial. employ machine learning to synthesize these situ gridded...
Abstract Southern Ocean surface cooling and Antarctic sea ice expansion from 1979 through 2015 have been linked both to changing atmospheric circulation melting of Antarctica's grounded shelves. However, climate models largely unable reproduce this behavior. Here we examine the contribution observed wind variability meltwater temperature (SST) ice. The free‐running, CMIP6‐class GISS‐E2.1‐G model can simulate regional neutral trends due internal variability, but they are unlikely....
Abstract Over the past 50 years, discovery and initial investigation of subglacial lakes in Antarctica have highlighted paleoglaciological information that may be recorded sediments at their beds. In December 2018, we accessed Mercer Subglacial Lake, West Antarctica, recovered first situ lake-sediment record—120 mm finely laminated mud. We combined geophysical observations, image analysis, quantitative stratigraphy techniques to estimate long-term mean lake sedimentation rates (SRs) between...
The PRISM3/GISS topographic reconstruction is one of the global data sets incorporated into a new for mid-Piacenzian warm interval Pliocene, at about 3.3 to 3.0 Ma. topography-gridded set digitization graphical reconstruction, provided 2 deg x resolution and based on updated paleoaltimetry refined land/ocean mask. Mid-Piacenzian topography as shown in this generally quite similar modern topography, with three notable differences: (1) coastline 25 meters higher than sea level, reflecting...