A5076390247- Cryospheric studies and observations
- Arctic and Antarctic ice dynamics
- Climate change and permafrost
- Winter Sports Injuries and Performance
- Landslides and related hazards
- Urban Heat Island Mitigation
- Geophysical Methods and Applications
- Methane Hydrates and Related Phenomena
- Microbial Community Ecology and Physiology
- Geological Studies and Exploration
- Geotechnical and Geomechanical Engineering
- Numerical methods in engineering
- Indigenous Studies and Ecology
- Icing and De-icing Technologies
- Food Industry and Aquatic Biology
- Marine and coastal ecosystems
- Freezing and Crystallization Processes
Cold Regions Research and Engineering Laboratory
2018-2024
United States Army Corps of Engineers
2022
Abstract The Ross Sea is known for showing the greatest sea-ice increase, as observed globally, particularly from 1979 to 2015. However, corresponding changes in thickness and production are not known, nor how these have impacted water masses, carbon fluxes, biogeochemical processes availability of micronutrients. PIPERS project sought address questions during an autumn ship campaign 2017 two spring airborne campaigns 2016 2017. used a multidisciplinary approach manned autonomous platforms...
Abstract The mechanical deformation of sea ice has substantial influence over large‐scale (e.g., >10 km) properties, such as the thickness distribution, well small‐scale <50 m) features, including leads and ridges. conditions leading to fracture are frequently studied in context a uniform sheet. Natural ice, however, is highly heterogeneous riddled with flaws. Failure occurs primarily brittle localized space time where stresses, strain rates, locally exceed failure criteria. Here we...
Abstract. A majority of snow radiative transfer models (RTMs) treat as a collection idealized grains rather than an organized ice–air matrix. Here we present generalized multi-layer photon-tracking RTM that simulates light reflectance and transmittance based on X-ray microtomography images, treating coherent 3D structure grains. The model uses blended approach to expand ray-tracing techniques applied sub-1 cm3 samples snowpacks arbitrary depths. While this framework has many potential...
Abstract. A majority of snow radiative transfer models (RTM) treat as a collection idealized grains rather than semi-organized ice-air matrix. Here we present generalized multi-layer photon-tracking RTM that simulates light transmissivity and reflectivity through based on x-ray microtomography, treating coherent structure grains. Notably, the model uses blended approach to expand ray-tracing techniques applied sub-1 cm3 samples snowpacks arbitrary depths. While this framework has many...
Abstract. Frozen ground can be important to flood production and is often heterogeneous within a watershed due spatial variations in the available energy, insulation by snowpack cover, thermal moisture properties of soil. The widely used continuous frozen index (CFGI) model degree-day approach identifies using simple frost index, which varies mainly with elevation through an elevation–temperature relationship. Similarly, snow depth its insulating effect are also estimated based on elevation....
Modeling the mechanical response of snow is a challenge due to wide range properties and conditions that impact mechanics, such as temperature, loading conditions, geometry microstructure. Current modeling approaches including finite element discrete methods have made great strides in micromechanical behavior snow, but they often make simplifications microstructure failure process. However, it has been shown individual grains sintered bonds form between them, well these bonds, are important...
As global temperatures rise, soil fractions of organic matter are being subjected to microbial degradation, particularly in high latitude regions.&#160; Concurrently, permafrost perched below active layer soils is thawing at unprecedented rates, significantly altering landscapes and ecosystem trajectories by changing subsurface conditions vegetation characteristics. Our aim was investigate an Alaskan microbiome&#8217;s response changes temperature water potential because they well...
Abstract. Frozen ground can be important to flood production and is often heterogeneous within a watershed due spatial variations in the available energy, insulation by snowpack cover, thermal moisture properties of soil. The widely-used Continuous Ground Index (CFGI) model degree-day approach identifies frozen using simple frost index, which varies mainly with elevation through temperature-elevation relationship. Similarly, snow depth its insulating effect are also estimated based on...
Modeling the mechanical response of snow is a challenge due to wide range properties and conditions that impact mechanics, such as temperature, loading conditions, geometry microstructure. Current modeling approaches including finite element or discrete methods have made great strides in micromechanical behavior snow, however they often make simplifications microstructure failure process. Despite this, it has been shown individual grains sintered bonds form between them, well these bonds,...
Earth and Space Science Open Archive This preprint has been submitted to is under consideration at Journal of Geophysical Research - Oceans. ESSOAr a venue for early communication or feedback before peer review. Data may be preliminary.Learn more about preprints preprintOpen AccessYou are viewing an older version [v1]Go new versionObservations Stress-Strain in Drifting Sea Ice Floe ScaleAuthorsJulieParnoiDChris MPolashenskiMatthewParnoiDTriciaNelsenAndrew RichardMahoneyiDArnoldSongSee all...
Earth and Space Science Open Archive This preprint has been submitted to is under consideration at Journal of Geophysical Research - Oceans. ESSOAr a venue for early communication or feedback before peer review. Data may be preliminary.Learn more about preprints preprintOpen AccessYou are viewing the latest version by default [v2]Observations Stress-Strain in Drifting Sea Ice Floe ScaleAuthorsJulieParnoiDChris MPolashenskiMatthewParnoiDTriciaNelsenAndrew RichardMahoneyiDArnoldSongSee all...