Results 71 to 80 of about 1,076 (175)
What SAR Labels Hide About a Changing Arctic
Earth's Future, Volume 14, Issue 8, August 2026.Abstract Synthetic aperture radar (SAR) has been the backbone of Arctic sea ice monitoring since the 1990s, yet nearly every operational product that assigns an ice class or geophysical state (melt onset dates, freeze‐up timing, ice‐type classifications) is derived by compressing continuous radar backscatter into discrete categorical labels.
M. Mahmud
wiley +1 more source
Development of a handheld integrating sphere snow grain sizer (HISSGraS)
Annals of GlaciologyWe developed a Handheld Integrating Sphere Snow Grain Sizer (HISSGraS) for field use to measure the specific surface area (SSA) of snow. In addition to snow samples, HISSGraS can directly measure snow surfaces and snow pit walls.
Teruo Aoki +12 more
doaj +1 more source
Measurement of Microstructure of Snow from Surface Sections
Defence Science Journal, 1995 A new approach to modelling the microstructure of snow is presented. The features involved in this formulation include skeletonising of the granular material and the modelling of the necks as a system of truncated cones. The skeletonising involves the process of representing the granular structure by a series of lines describing the grains and the
M.Q. Edens, R.L. Brown
openaire +1 more source
Simulation of Arctic snow microwave emission in surface-sensitive atmosphere channels [PDF]
The CryosphereAccurate simulations of snow emission in surface-sensitive microwave channels are needed to separate snow from atmospheric information essential for numerical weather prediction.
M. Sandells +9 more
doaj +1 more source
On the compressive strength of weak snow layers of depth hoar
Journal of GlaciologyWe 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.
Jakob Schöttner +9 more
doaj +1 more source
Spectral measurements of surface hoar crystals
Journal of Glaciology, 2017 Surface hoar crystals are common on the surface of mountain snow covers. Once buried, layers of large plate-shaped surface hoar crystals are prone to releasing dangerous snow-slab avalanches. Since snow microstructure influences the optical properties of
SIMON HORTON, BRUCE JAMIESON
doaj +1 more source
Journal of GlaciologyQuantifying micromechanical and microstructural properties of snow is crucial, as they control bulk thermal, electrical and mechanical properties.
James Chris McCaslin +3 more
doaj +1 more source
Analysis of QualitySpec Trek Reflectance from Vertical Profiles of Taiga Snowpack
Geosciences, 2018 Snow microstructure is an important factor for microwave and optical remote sensing of snow. One parameter used to describe it is the specific surface area (SSA), which is defined as the surface-area-to-mass ratio of snow grains.
Leena Leppänen, Anna Kontu
doaj +1 more source
Impact of spatial averaging on radar reflectivity at internal snowpack layer boundaries
Journal of Glaciology, 2016 Microwave radar amplitude within a snowpack can be strongly influenced by spatial variability of internal layer boundaries. We quantify the impact of spatial averaging of snow stratigraphy and physical snowpack properties on surface scattering from near ...
N. RUTTER +4 more
doaj +1 more source
Tower-based C-band radar measurements of an alpine snowpack [PDF]
The CryosphereTo better understand the interactions between C-band radar waves and snow, a tower-based experiment was set up in the Idaho Rocky Mountains for the period of 2021–2023.
I. Brangers +6 more
doaj +1 more source