Henning Löwe
YOU?
Author Swipe
View article: The influence of snow microstructure on the compressive mechanical properties of weak snowpack layers
The influence of snow microstructure on the compressive mechanical properties of weak snowpack layers Open
To find a link between microstructure and the mechanical properties of weak snow layers, we acquired a comprehensive dataset combining mechanical tests for compressive strength and stiffness on 278 weak layer samples with high-resolution 3…
View article: Spatial-variability of snow surface and snowpack properties characterized by near-infrared diffuse reflectance imaging
Spatial-variability of snow surface and snowpack properties characterized by near-infrared diffuse reflectance imaging Open
Near-infrared diffuse reflectance imaging is well-suited to accurately characterize macro- and microscopic properties of snow.1 The technique's versatility and capability to resolve details down to the millimeter-scale, while simultaneousl…
View article: Towards a physically and microstructure-based equation for the evolution of the specific surface area in snow
Towards a physically and microstructure-based equation for the evolution of the specific surface area in snow Open
The specific surface area (SSA) of snow is a critical structural quantity that controls snow properties and constantly evolves over time. An accurate understanding and modeling of the dynamical evolution of the SSA is thus of primary impor…
View article: On the compressive strength of weak snow layers of depth hoar
On the compressive strength of weak snow layers of depth hoar Open
We determined the compressive strength of weak layers of faceted crystals and depth hoar using artificially grown samples with a wide range of microstructural morphologies in a cold laboratory setup. Micro-computed tomography ( µ CT) imagi…
View article: GRFsaw: A lightweight stochastic microstructure generator
GRFsaw: A lightweight stochastic microstructure generator Open
This article presents GRFsaw, an open-source software for generating two-phase (binary) microstructures with user-defined structural properties. Unlike most standard software for microstructure generation, GRFsaw is based on the concept of…
View article: Wind tunnel experiments to quantify the effect of aeolian snow transport on the surface snow microstructure
Wind tunnel experiments to quantify the effect of aeolian snow transport on the surface snow microstructure Open
The evolution of the surface snow microstructure under the influence of wind during precipitation events is hardly understood but crucial for polar and alpine snowpacks. Available statistical models are solely parameterized from field data…
View article: Microstructure-based simulations of the viscous densification of snow and firn
Microstructure-based simulations of the viscous densification of snow and firn Open
Accurate models for the viscous densification of snow (understood here as a density below 550 kg m−3) and firn (a density above 550 kg m−3) under mechanical stress are of primary importance for various applications, including avalanche pre…
View article: Altimetric Ku-band Radar Observations of Snow on Sea Ice Simulated with SMRT
Altimetric Ku-band Radar Observations of Snow on Sea Ice Simulated with SMRT Open
Sea ice thickness is essential for climate studies and numerical weather prediction. Radar altimetry has provided sea ice thickness measurement since the launch of ERS-1 and currently through CryoSat-2, Sentinel-3 and Altika but uncertaint…
View article: A rigorous approach to the specific surface area evolution in snow during temperature gradient metamorphism
A rigorous approach to the specific surface area evolution in snow during temperature gradient metamorphism Open
Despite being one of the most fundamental microstructural parameters of snow, the specific surface area (SSA) dynamics during temperature gradient metamorphism (TGM) have so far been addressed only within empirical modeling. To surpass thi…
View article: A microstructure-based parameterization of the effective anisotropic elasticity tensor of snow, firn, and bubbly ice
A microstructure-based parameterization of the effective anisotropic elasticity tensor of snow, firn, and bubbly ice Open
Quantifying the link between microstructure and effective elastic properties of snow, firn, and bubbly ice is essential for many applications in cryospheric sciences. The microstructure of snow and ice can be characterized by different typ…
View article: High-resolution snow parameter/structure retrieval from tower-based radar time series of seasonal snow obtained with the ESA SnowScat and the ESA Wideband Scatterometer in SAR tomographic profiling mode
High-resolution snow parameter/structure retrieval from tower-based radar time series of seasonal snow obtained with the ESA SnowScat and the ESA Wideband Scatterometer in SAR tomographic profiling mode Open
Seasonal alpine snow is subject to fluctuating meteorological conditions with diurnal temperature cycles around the freezing point and a mix of snow and rain. Throughout the season, fresh snow accumulations repeatedly contribute to the sno…
View article: Determining snow material properties from near-infrared photography
Determining snow material properties from near-infrared photography Open
It is well understood that snow is a complex, porous material, whose microstructural changes directly affect its physical properties. Therefore, – to gauge the snow's role within the climate system – it is of interest to accura…
View article: Wind tunnel experiments to characterize snow densification and SSA reduction caused by aeolian snow transport
Wind tunnel experiments to characterize snow densification and SSA reduction caused by aeolian snow transport Open
Snow precipitation frequently occurs under moderate to strong wind conditions, resulting in drifting and blowing snow. Processes like particle fragmentation and airborne metamorphism during snow transport result in microstructural modifica…
View article: Temporospatial variability of snow's thermal conductivity on Arctic sea ice
Temporospatial variability of snow's thermal conductivity on Arctic sea ice Open
Snow significantly impacts the seasonal growth of Arctic sea ice due to its thermally insulating properties. Various measurements and parameterizations of thermal properties exist, but an assessment of the entire seasonal evolution of ther…
View article: A finite-element framework to explore the numerical solution of the coupled problem of heat conduction, water vapor diffusion, and settlement in dry snow (IvoriFEM v0.1.0)
A finite-element framework to explore the numerical solution of the coupled problem of heat conduction, water vapor diffusion, and settlement in dry snow (IvoriFEM v0.1.0) Open
The poor treatment (or complete omission) of water vapor transport has been identified as a major limitation suffered by currently available snowpack models. As vapor and heat fluxes are closely intertwined, their mathematical representati…
View article: A grain-size driven transition in the deformation mechanism in slow snow compression
A grain-size driven transition in the deformation mechanism in slow snow compression Open
Compression of snow at low strain rates governs the natural densification of snow and firn on Earth. Different deformation mechanisms (e.g., grain boundary sliding and dislocation creep) are widely employed in models and are mainly believe…
View article: A rigorous approach to the specific surface area evolution in snow during temperature gradient metamorphism
A rigorous approach to the specific surface area evolution in snow during temperature gradient metamorphism Open
Despite being one of the most fundamental microstructural parameters of snow, the specific surface area (SSA) dynamics during temperature gradient metamorphism (TGM) have so far been addressed only within empirical modeling. To surpass thi…
View article: Microstructure-based simulations of the viscous densification of snow and firn
Microstructure-based simulations of the viscous densification of snow and firn Open
Accurate models for the viscous densification of snow and firn under mechanical stress are of primary importance for various applications, including avalanche prediction and the interpretation of ice cores. Formulations of snow and firn co…
View article: Wind tunnel experiments to quantify the effect of aeolian snow transport on the surface snow microstructure
Wind tunnel experiments to quantify the effect of aeolian snow transport on the surface snow microstructure Open
The evolution of the surface snow microstructure under the influence of wind is hardly understood but crucial for polar and alpine snowpacks. Available statistical models are solely parameterized from field data where conditions are diffic…
View article: Comment on tc-2023-30
Comment on tc-2023-30 Open
Abstract. Snow is a complex porous material presenting various microstructural patterns. This microstructure controls the mechanical properties of snow, and this control still needs to be better understood. Recent numerical developments ba…
View article: A finite-element framework to explore the numerical solution of the coupled problem of heat conduction, water vapor diffusion and settlement in dry snow (IvoriFEM v0.1.0)
A finite-element framework to explore the numerical solution of the coupled problem of heat conduction, water vapor diffusion and settlement in dry snow (IvoriFEM v0.1.0) Open
The poor treatment, or complete omission, of water vapor transport has been identified as a major limitation suffered by currently available snowpack models. Vapor and heat fluxes being closely intertwined, their mathematical representatio…
View article: Comment on egusphere-2023-83
Comment on egusphere-2023-83 Open
Abstract. Snow significantly impacts the seasonal growth of Arctic sea ice due to its thermally insulating properties. Various measurements and parametrizations of thermal properties exist, but an assessment of the entire seasonal evolutio…
View article: Examining the effect of snow type on effective viscoplastic properties in micro-compression experiments through repeated load-relaxation cycles
Examining the effect of snow type on effective viscoplastic properties in micro-compression experiments through repeated load-relaxation cycles Open
It is well known that the snow type can affect the mechanical behavior during slow compression, which may indicate fundamental differences in the deformation mechanisms. To examine these differences, we performed consecutive loading-relaxa…
View article: A microstructure-based parameterization of the effective, anisotropic elasticity tensor of snow, firn, and bubbly ice
A microstructure-based parameterization of the effective, anisotropic elasticity tensor of snow, firn, and bubbly ice Open
Quantifying the link between microstructure and effective elastic properties of snow, firn, and bubbly ice is essential for many applications in cryospheric sciences. The microstructure of snow and ice can be characterized by different typ…
View article: Comment on egusphere-2023-83
Comment on egusphere-2023-83 Open
Abstract. Snow significantly impacts the seasonal growth of Arctic sea ice due to its thermally insulating properties. Various measurements and parametrizations of thermal properties exist, but an assessment of the entire seasonal evolutio…
View article: Thermal Conductivity of Snow on Arctic Sea Ice
Thermal Conductivity of Snow on Arctic Sea Ice Open
Snow significantly impacts the seasonal growth of Arctic sea ice due to its thermally insulating properties. Various measurements and parametrizations of thermal properties exist, but an assessment of the entire seasonal evolution of therm…
View article: Brief communication: A continuous formulation of microwave scattering from fresh snow to bubbly ice from first principles
Brief communication: A continuous formulation of microwave scattering from fresh snow to bubbly ice from first principles Open
Microwave remote sensing of the cryosphere demands a formulation of the scattering coefficient which can be applied over the entire range of relevant densities, from fresh snow to bubbly ice, at all frequencies and for any grain size and s…
View article: Comment on tc-2022-111
Comment on tc-2022-111 Open
Abstract. Cone penetration tests have long been used to characterize snowpack stratigraphy. With the development of sophisticated digital penetrometers such as the SnowMicroPen, vertical profiles of snow hardness can now be measured at a s…