Results 31 to 40 of about 5,965,886 (309)

Linking Regional Winter Sea Ice Thickness and Surface Roughness to Spring Melt Pond Fraction on Landfast Arctic Sea Ice

open access: yesRemote Sensing, 2017
The Arctic sea ice cover has decreased strongly in extent, thickness, volume and age in recent decades. The melt season presents a significant challenge for sea ice forecasting due to uncertainty associated with the role of surface melt ponds in ice ...
Sasha Nasonova   +3 more
doaj   +1 more source

Detection of the 2010 Chilean tsunami using satellite altimetry [PDF]

open access: yesNatural Hazards and Earth System Sciences, 2011
Tsunamis are difficult to detect and measure in the open ocean because the wave amplitude is much smaller than it is closer to shore. An effective early warning system, however, must be able to observe an impending tsunami threat far away from the shore ...
B. D. Hamlington   +5 more
doaj   +1 more source

Sensitivity to changes in the surface‐layer turbulence parameterization for stable conditions in winter: A case study with a regional climate model over the Arctic

open access: yesAtmospheric Science Letters, 2022
The modeling of the atmospheric boundary layer over sea ice is still challenging because of the complex interaction between clouds, radiation and turbulence over the often inhomogeneous sea ice cover.
Thea Schneider   +8 more
doaj   +1 more source

Estimation of Level and Deformed First-Year Sea Ice Surface Roughness in the Canadian Arctic Archipelago from C- and L-Band Synthetic Aperture Radar

open access: yesCanadian Journal of Remote Sensing, 2019
Utilizing synthetic aperture radar (SAR) data to understand and map sea ice roughness is an active area of research. An object-based image analysis is here used to quantitatively link the winter first-year sea ice surface roughness to C-band RADARSAT-2 ...
Silvie Marie Cafarella   +6 more
doaj   +1 more source

The role of atmospheric boundary layer-surface interactions on the development of coastal fronts [PDF]

open access: yesAnnales Geophysicae, 2007
Frictional convergence and thermal difference between land and sea surface are the two surface conditions that govern the intensity and evolution of a coastal front.
D. Malda   +4 more
doaj   +1 more source

A fibre optic sensor for the measurement of surface roughness and displacement using artificial neural networks [PDF]

open access: yes, 1997
This paper presents a fiber optic sensor system, artificial neural networks (fast back-propagation) are employed for the data processing. The use of the neural networks makes it possible for the sensor to be used both for surface roughness and ...
Butler, C, Lu, Y, Zhang, K, Yang, QP
core   +1 more source

Determining Variability in Arctic Sea Ice Pressure Ridge Topography With ICESat‐2

open access: yesGeophysical Research Letters, 2022
We investigate the characteristics and distribution of pressure ridges in Arctic sea ice using a novel algorithm applied to ICESat‐2 surface heights. We derive the frequency and height of individual pressure ridges and map surface roughness and ridging ...
K. Duncan, S. L. Farrell
doaj   +1 more source

How to select the most relevant 3D roughness parameters of a surface [PDF]

open access: yes, 2014
In order to conduct a comprehensive roughness analysis, around sixty 3D roughness parameters are created to describe most of the surface morphology with regard to specific functions, properties or applications.
Bigerelle, M.   +11 more
core   +1 more source

A Novel Sea Surface Roughness Parameterization Based on Wave State and Sea Foam

open access: yesJournal of Marine Science and Engineering, 2021
A wave state related sea surface roughness parameterization scheme that takes into account the impact of sea foam is proposed in this study. Using eight observational datasets, the performances of two most widely used wave state related parameterizations
Difu Sun   +4 more
doaj   +1 more source

Influence of Wave State and Sea Spray on the Roughness Length: Feedback on Medicanes

open access: yesAtmosphere, 2018
Occasionally, storms that share many features with tropical cyclones, including the presence of a quasi-circular “eye” a warm core and strong winds, are observed in the Mediterranean.
Umberto Rizza   +9 more
doaj   +1 more source

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