A5043012521- Arctic and Antarctic ice dynamics
- Cryospheric studies and observations
- Climate change and permafrost
- Methane Hydrates and Related Phenomena
- Ship Hydrodynamics and Maneuverability
- Atmospheric and Environmental Gas Dynamics
- Oil Spill Detection and Mitigation
- Polar Research and Ecology
- Geological Studies and Exploration
- Ocean Acidification Effects and Responses
- Geophysics and Gravity Measurements
- Cavitation Phenomena in Pumps
- Marine Biology and Ecology Research
- Underwater Vehicles and Communication Systems
- Microbial Community Ecology and Physiology
- Indigenous Studies and Ecology
- Oceanographic and Atmospheric Processes
- Fluid dynamics and aerodynamics studies
- Arctic and Russian Policy Studies
- Marine and coastal ecosystems
- Fluid Dynamics Simulations and Interactions
- Icing and De-icing Technologies
- Genomics and Phylogenetic Studies
- Hydrology and Watershed Management Studies
- Global Energy and Sustainability Research
University of Alaska Fairbanks
2017-2025
Norwegian Polar Institute
2022-2023
International Arctic Research Center
2020-2021
Year-round observations of the physical snow and ice properties processes that govern pack evolution its interaction with atmosphere ocean were conducted during Multidisciplinary drifting Observatory for Study Arctic Climate (MOSAiC) expedition research vessel Polarstern in Ocean from October 2019 to September 2020. This work was embedded into interdisciplinary design 5 MOSAiC teams, studying atmosphere, sea ice, ocean, ecosystem, biogeochemical processes. The overall aim characterize cover...
Repeated transects have become the backbone of spatially distributed ice and snow thickness measurements crucial for understanding mass balance. Here we detail at Multidisciplinary drifting Observatory Study Arctic Climate (MOSAiC) 2019–2020, which represent first such collected across an entire season. Compared with similar historical transects, MOSAiC was thin (mean depths approximately 0.1–0.3 m), while sea relatively thick first-year (FYI) second-year (SYI). SYI two distinct types: level...
Abstract. Data from the Multidisciplinary drifting Observatory for Study of Arctic Climate (MOSAiC) expedition allowed us to investigate temporal dynamics snowfall, snow accumulation and erosion in great detail almost whole season (November 2019 May 2020). We computed cumulative water equivalent (SWE) over sea ice based on depth density retrievals a SnowMicroPen approximately weekly measured depths along fixed transect paths. used derived SWE cover compare with precipitation sensors...
Low-salinity meltwater from Arctic sea ice and its snow cover accumulates creates under-ice layers below ice. These can result in the formation of new layers, or false bottoms, at interface this low-salinity colder seawater. As part Multidisciplinary drifting Observatory for Study Climate (MOSAiC), we used a combination coring, temperature profiles thermistor strings underwater multibeam sonar surveys with remotely operated vehicle (ROV) to study areal coverage temporal evolution bottoms...
The increased fraction of first year ice (FYI) at the expense old (second-year (SYI) and multi-year (MYI)) likely affects permeability Arctic cover. This in turn influences pathways gases circulating therein exchange interfaces with atmosphere ocean. We present sea temperature salinity time series from different types relevant to temporal development brine drainage efficiency freeze-up October onset spring warming May. Our study is based on a dataset collected during Multidisciplinary...
Abstract Sea-ice pore microstructure constrains ice transport properties, affecting fluid flow relevant to oil-in-ice and biogeochemical processes. Motivated by a lack of microstructural data, in particular for granular across the seasonal cycle, throat size, tortuosity, connectivity, other variables were derived from X-ray computed tomography brine-filled pores landfast off northern Alaska. Data obtained columnar during growth, transition, melt season. While exhibits more heterogeneous...
Abstract The Multidisciplinary Observatory for Study of the Arctic Climate (MOSAiC) expedition consisted a year-long drifting survey Central Ocean. ecosystems component MOSAiC included sampling molecular data, with metagenomes collected from diverse range environments. generation metagenome-assembled-genomes (MAGs) are starting point genome-resolved analyses. This dataset presents catalogue MAGs recovered set 73 samples MOSAiC, including 2407 prokaryotic and 56 eukaryotic MAGs, as well...
Abstract The formation of platelet ice is well known to occur under Antarctic sea ice, where subice layers form from supercooled shelf water. In the Arctic, however, has not been extensively observed, and its morphology currently remain enigmatic. Here, we present first comprehensive, long‐term in situ observations a decimeter thick layer free‐drifting pack Central Arctic winter. Observations carried out with remotely operated underwater vehicle (ROV) during midwinter leg MOSAiC drift...
Abstract Snow plays an essential role in the Arctic as interface between sea ice and atmosphere. Optical properties, thermal conductivity mass distribution are critical to understanding complex system’s energy balance distribution. By conducting measurements from October 2019 September 2020 on Multidisciplinary drifting Observatory for Study of Climate (MOSAiC) expedition, we have produced a dataset capturing year-long evolution physical properties snow surface scattering layer, highly...
Abstract. Data from the Multidisciplinary drifting Observatory for Study of Arctic Climate (MOSAiC) expedition allowed us to investigate temporal dynamics snowfall, snow accumulation, and erosion in great detail almost whole accumulation season (November 2019 May 2020). We computed cumulative water equivalent (SWE) over sea ice based on depth (HS) density retrievals a SnowMicroPen (SMP) approximately weekly-measured depths along fixed transect paths. Hence, SWE considers surface...
Snow and ice topography impact are impacted by fluxes of mass, energy, momentum in Arctic sea ice. We measured the on approximately a 0.5 km
Abstract Snow depth on sea ice is an Essential Climate Variable and a major source of uncertainty in satellite altimetry‐derived thickness. During winter the MOSAiC Expedition, “KuKa” dual‐frequency, fully polarized Ku‐ Ka‐band radar was deployed “stare” nadir‐looking mode to investigate possibility combining these two frequencies retrieve snow depth. Three approaches were investigated: dual‐polarization waveform shape, compared independent measurements. Novel yielded r 2 values up 0.77....
The international and interdisciplinary sea-ice drift expedition “The Multidisciplinary drifting Observatory for the Study of Arctic Climate” (MOSAiC) was conducted from October 2019 to September 2020. aim MOSAiC study interconnected physical, chemical, biological characteristics processes atmosphere deep sea central system. ecosystem team addressed current knowledge gaps explored unknown properties over a complete seasonal cycle focusing on three major research areas: biodiversity,...
ABSTRACT (2017-147) In 2014, researchers from ten organizations came to the U.S. Army Corps of Engineers, Cold Regions Research and Engineering Laboratory (CRREL) in New Hampshire conduct a first its kind large-scale experiment aimed at determining current sensor capabilities for detecting oil under sea ice. This project was second phase Oil Spill Detection Low Visibility Ice research International Association Gas Producers (IOGP), Arctic Response Technology - Joint Industry Programme. The...
Low-salinity meltwater from Arctic sea ice and its snow cover accumulates creates under-ice layers below ice. These can result in the formation of new layers, or false bottoms, at interface this low-salinity colder seawater. As part Multidisciplinary drifting Observatory for Study Climate (MOSAiC), we used a combination coring, temperature profiles thermistor strings underwater multibeam sonar surveys with remotely operated vehicle (ROV) to study areal coverage temporal evolution bottoms...
A ground-based ultra-wideband radiometer operating at 540, 900, 1380, and 1740 MHz was used to measure microwave thermal emissions from an Arctic sea ice floe as part of the Multidisciplinary drifting Observatory for Study Climate (MOSAiC) Expedition. The instrument deployed on a near 86°N, 120°E in leg 1 expedition (December 2019) observed second-year (potentially with refrozen melt ponds) that experienced new growth its base over ten-day period. Measured circularly polarized brightness...
Abstract The sub-kilometre scale distribution of snow depth on Arctic sea ice impacts atmosphere-ice fluxes energy and mass, is importance for satellite estimates sea-ice thickness from both radar lidar altimeters. While information about the mean this increasingly available modelling remote sensing, full cannot yet be resolved. We analyse 33 539 measurements 499 transects taken at Soviet drifting stations between 1955 1991 derive a simple statistical over multi-year as function only depth....
In 2009, l’Hydroptere broke the symbolic barrier of 50 knots and became world fastest sailing boat over both 500 meters 1 nautical mile. This major achievement relied on high skills team but also technical advances boat, resulting from scientific collaboration between Hydroptere Design Team Ecole Polytechnique Federale de Lausanne (EPFL). present article, we highlight multidisciplinary research activity performed within EPFL in course this involving aero- hydrodynamics, materials structure...
Abstract. Validation of sea-ice models, representation processes in large-scale and regional planning around ice use hazards requires climatological property data. We summarize key properties, particular temperature salinity, representative broader Arctic conditions, from long-term observations near Utqiaġvik, Alaska Van Mijen Fjord, Svalbard. Additionally, we simulate salinity profiles using the Los Alamos model (CICE) stand-alone mode, forced with meteorological data for both locations....