roughness length
Impact of the Waves on the Sea Surface Roughness Length under Idealized Like Hurricane Wind Conditions (Part II)
... Ocean surface gravity waves are one manifestation of the interaction between the atmosphere and the ocean, which can have a significant impact on the transfer of momentum and enthalpy (heat) across the atmosphere- ocean ...
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Temporal changes in small scale snowpack surface roughness length for sublimation estimates in hydrological modelling
... the roughness length was computed from the sensible heat flux (heat) and latent mass flux (mass) equations for the two sets of VAISALLA sensors (1 and 2), assuming that the momentum roughness ...
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Predicting the roughness length of turbulent flows over landscapes with multi-scale microtopography
... The computational grids we used consisted of 2-D terrain- following coordinate systems. Thirty logarithmically spaced grid points were used in the vertical direction, ranging from 0.1 mm to 10 m above the bed. We used ...
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Aerodynamic roughness length estimation from very high resolution imaging LIDAR observations over the Heihe basin in China
... Abstract. Roughness length of land surfaces is an essen- tial variable for the parameterisation of momentum and heat ...aerodynamic roughness length over a heterogeneous landscape of the Heihe ...
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Effect of barnacle fouling on ship resistance and powering
... given roughness function model and they show a systematic ...type roughness function model can be achieved since the behaviours of the roughness functions showed a very good agreement with the ...
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Numerical Simulations of Mesoscale Boundary Layer Structure over New York City
... SODARS, roughness length will be calculated for the different flow regimes observed over the ...of roughness length variations on the 10-m wind flow, as well as the development and inland ...
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Study of Aerodynamic Surface Roughness for Baghdad City Using Signal-Level Measurements
... Roughness length is one of the key variables in micrometeorological studies and environmental studies in regards to describing development of cities and urban ...displacement length of eight sections ...
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European extra-tropical storm damage risk from a multi-model ensemble of dynamically-downscaled global climate models
... Abstract. Uncertainty in the return levels of insured loss from European wind storms was quantified using storms de- rived from twenty-two 25 km regional climate model runs driven by either the ERA40 reanalyses or one of ...
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Quantifying the changes of soil surface microroughness due to rainfall impact on a smooth surface
... surface roughness on the order of ∼ 5– 50 mm and have reported a decay of soil surface roughness with ...in roughness when subject to rainfall ...micro- roughness length scales on the ...
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Impact of the Waves on the Sea Surface Roughness under Uniform Wind Conditions: Idealized Cases for Uniform Winds (Part I)
... The present results show important aspects when the sea state is included in the computation of sea surface roughness length. These aspects are related to the change of values of drag and wind velocity near ...
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Evaluating parameterizations of aerodynamic resistance to heat transfer using field measurements
... surface roughness parameters In this paper, the roughness length for momentum transfer z 0m is determined by minimizing the cost function (Yang ...
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Modelling atmospheric dry deposition in urban areas using an urban canopy approach
... The model described here is developed for use in three- dimensional gridded air quality models and is designed to simulate the transfer of pollutants from the atmosphere to ur- ban surfaces. It is a bulk approach, ...
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Quantification of basal friction for technical and silvicultural glide-snow avalanche mitigation measures
... terrain roughness corresponding to stepped or rocky terrain and dwarf shrubs ...terrain roughness corresponding to strong lignified shrubs, stumps or piles of dead wood to hinder ...low roughness and ...
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Describing soil surface microrelief by crossover length and fractal dimension
... square (RMS). Both algorithms, SMV and RMS, gave equiv- alent results for D and l indices, irrespective of trend removal procedure, even if some bias was present which is in accor- dance with previous work. Treatments ...
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Effect of accelerated aging treatment on a surface property and dynamic mechanical properties of commercial wood-based panels
... Surface profile was recorded before, during and after the aging treatment. Surface profile provides a prompt visual view of panel surface changes. Surface structure changed after the aging treatment, which was evident ...
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Study of Simultaneous Effect of Sharp- Roughness and Positive Slope on Hydraulic Jump in Stilling Basins
... rhombic roughness was installed and tested changing bed slope from 0 to ...jump length of water surface profile, water head over spillway, and upstream water head were carefully ...rhombic roughness ...
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Estimation of surface soil moisture and roughness from multi angular ASAR imagery in the Watershed Allied Telemetry Experimental Research (WATER)
... timate roughness parameter based solely on a normalized backscatter observation, subsequently, the deduced rough- ness can be used in the inversion of soil moisture by the ...surface roughness parameters by ...
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Human Roughness Perception and Possible Factors Effecting Roughness Sensation
... These experiments were repeated for two different temperatures: room temperature and body temperature. The main motivation for this was to predict the perceived roughness during oral processing. The previous ...
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Arctic sea ice surface roughness derived from multi-
... To assign a quantitative roughness value to the MISR angular reflectance data, we require 105.. measurements of sea ice surface roughness over a wide range of roughness val[r] ...
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Characteristics of diamond turned NiP smoothed with ion beam planarization technique
... subsequent steps. Ion beam machining is a much deter- ministic process for final modification to surface of optics. However, on some occasions, ion beam machining alone is incapable of improving surface roughness. ...
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