Results 21 to 30 of about 6,074 (256)
The effects of surface roughness on the calculated, spectral, conical–conical reflectance factor as an alternative to the bidirectional reflectance distribution function of bare sea ice [PDF]
The Cryosphere, 2023 The conical–conical reflectance factor (CCRF) has been calculated as an alternative to the bidirectional reflectance distribution function (BRDF) for three types of bare sea ice with varying surface roughness (σ= 0.1–10) and ice thicknesses (50–2000 cm ...
M. L. Lamare, J. D. Hedley, M. D. King
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Remote Sensing, 2022 Sea ice roughness can serve as a proxy for other sea ice characteristics such as ice thickness and ice age. Arctic-wide maps that represent spatial patterns of sea ice roughness can be used to better characterize spatial patterns of ice convergence and ...
Ehsan Mosadegh, Anne W. Nolin
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Journal of Marine Science and Engineering, 2022 The development of wind wave (i.e., sea state) inside an intense tropical cyclone (TC) is the dominant contributor to the sea surface roughness and thus significantly impacts the air–sea interaction. The sea state is known to vary with TC characteristics
Shuiqing Li +3 more
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Effects of decimetre-scale surface roughness on L-band brightness temperature of sea ice [PDF]
The Cryosphere, 2020 Sea ice thickness is an essential climate variable. Current L-Band sea ice thickness retrieval methods do not account for sea ice surface roughness that is hypothesised to be not relevant to the process.
M. Miernecki +6 more
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Sea‐surface aerodynamic roughness [PDF]
Journal of Geophysical Research: Oceans, 2003 This study surveys and evaluates similarity theory for estimating the sea‐surface drag coefficient with the bulk aerodynamic method. The most commonly used formulations of the aerodynamic roughness length, required by similarity theory, are examined using data sets from four different field programs. These relationships include the Charnock formulation
L. Mahrt +4 more
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Remote Sensing, 2021 This study presents mathematical analysis and numerical modeling for the estimation of measurement errors of height estimation over the sea surface for a precision radar altimeter installed in a low altitude flying vehicle.
Aleksandr I. Baskakov +3 more
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Deep Learning‐Based Sea Surface Roughness Parameterization Scheme Improves Sea Surface Wind Forecast
Geophysical Research Letters, 2023 Accurate offshore surface wind forecasting is crucial for navigation safety and disaster prevention. However, significant biases exist in forecasting sea surface winds due to the uncertainties in estimating sea surface roughness.
Shu Fu +6 more
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Parameterizing the Sea Surface Roughness
Journal of Physical Oceanography, 2005 Abstract The concept of an “equivalent surface roughness” over the ocean is useful in understanding the relation between wind speed (at some height) and the net momentum flux from air to sea. The relative performance of different physics-motivated scalings for this roughness can provide valuable guidance as to which mechanisms are ...
Drennan, William M. +2 more
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Surface roughness of Baltic sea ice [PDF]
Journal of Geophysical Research: Oceans, 1997 Small‐, medium‐, and large‐scale measurements of sea ice surface roughness were carried out in the Baltic Sea over a 3‐year period. A clear relationship was found between the rms height and correlation length of Baltic sea ice. In most cases the surface correlation function was close to exponential.
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Towards Control of Autonomous Surface Vehicles in Rough Seas
IFAC-PapersOnLine, 2020 Abstract This paper addresses the problem of controlling an Autonomous Surface Vehicle (ASV) in rough sea-states, with a view towards minimising wave-induced forces, whilst maintaining headway. This is a challenging control application since, and as is derived in the paper, the interaction between the vessel and the wave disturbance is nonlinear and ...
McCullough, D.R. +3 more
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