Résultats de la recherche (23 résultats)
Affinez votre recherche
Par Collection Par Auteur- LANCASTER, N. (2)
- GOOSSENS, D. (2)
- ARENS, S.M. (1)
- BORGA, M. (1)
- BUTTERFIELD, G. R. (1)
- CHANDLER, D.G. (1)
- CLARK, D. G. (1)
- DELLA FONTANA, G. (1)
- GEARHART, E.A. (1)
- GILL, T.E. (1)
- GILLETTE, D.A. (1)
- GRIMMOND, C.S.B. (1)
- HAO YONGLU (1)
- HASTINGS, K. (1)
- HERBERT, G. (1)
- HERRMANN, L. (1)
- HESP, P.A., (Editeur scientifique) (1)
- HOLMES, P. (1)
- HYDE, R. (1)
- ILLENBERGER, W. (1)
- 1991 (3)
- 1983 (2)
- 1989 (2)
- 1996 (2)
- 2004 (2)
- 1977 (1)
- 1982 (1)
- 1990 (1)
- 1997 (1)
- 1998 (1)
- 2002 (1)
- 2005 (1)
- 2006 (1)
- 2007 (1)
- 2010 (1)
- 2011 (1)
- 2012 (1)
- Physical geography (6)
- Geography of Asia (2)
- Aeolian dust ; Aeolian features ; Aeolian transport ; Agricultural practice ; Agroclimatology ; Erodibility ; Free State ; Roughness ; Soil properties ; South Africa ; Threshold ; Wind erosion (1)
- Aeolian dust ; Aeolian features ; Belgium ; Experimentation ; Grain size distribution ; Pebbles ; Spatial distribution ; Wind speed (1)
- Aeolian dust ; Aeolian features ; Loess ; Oregon ; Plateau ; Roughness ; Soil erosion ; Surface deposits ; United States of America ; Washington State ; Wind erosion ; Wind speed (1)
- Aeolian features ; Aeolian transport ; Aerosol ; Arid area ; California ; Duricrust ; Dust storm ; Lake ; United States of America ; Wind erosion (1)
- Aeolian features ; Aeolian transport ; Antarctica ; Arid area ; Cold desert ; Roughness (1)
- Aeolian features ; Aeolian transport ; Arid area ; Barchan ; Dune ; Earth surface processes ; Geomorphometry ; Namibia ; Wind (1)
- Aeolian features ; Aeolian transport ; Avalanche ; California ; Mass movement ; Model ; Roughness ; Soil properties ; United States of America ; Wind erosion ; Wind speed (1)
- Aeolian features ; Aeolian transport ; Barchan ; Beach ; Coastal environment ; Dune ; Freezing ; Netherlands (The) ; Wind ; Wind speed (1)
- Aeolian features ; Africa ; Arid area ; Experimentation ; Niger ; Roughness ; Sahel ; Turbulence ; Wind erosion (1)
- Aeolian features ; Arid area ; China ; Desert ; Experimentation ; Grain size distribution ; Gravel ; Model ; Roughness ; Sediment transport (1)
- Afrique ; Domaine aride ; Eolien ; Erosion éolienne ; Expérimentation ; Niger ; Rugosité ; Sahel ; Turbulence (1)
- Afrique du Sud ; Agroclimatologie ; Eolien ; Erodabilité ; Erosion éolienne ; Free State ; Poussière éolienne ; Pratique culturale ; Propriétés du sol ; Rugosité ; Seuil ; Transport éolien (1)
- Afrique du Sud ; Dune ; Eolien ; Géographie physique ; Géomorphodynamique ; Littoral ; Sable (1)
- Agroclimatologie ; Caoutchouc ; Chine ; Chine du Sud ; Donnée climatique ; Flux thermique ; Forêt ; Géographie de l'Asie ; Hainan île ; Microclimat ; Radiation ; Zone intertropicale (1)
- Agroclimatología ; Erodabilidad ; Erosión eólica ; Estado Libre de Orange ; Eólico ; Polvo eólico ; Propiedades del suelo ; Práctica de cultivo ; Rugosidad ; Transporte eólico ; Umbral ; África del Sur (1)
- Agropédologie ; Bilan énergétique ; Chine ; Cycle de l'eau ; Céréale ; Evapotranspiration ; Géographie de l'Asie ; Modèle ; Résistance aérodynamique (1)
- Air quality ; Atmospheric pollution ; Berlin ; Climate ; Germany ; Pollution ; Spatial variation ; Urban ecology (1)
- Allemagne ; Berlin ; Climat ; Ecologie urbaine ; Pollution ; Pollution atmosphérique ; Qualité de l'air ; Variation spatiale (1)
- Response of aeolian processes to global climate change (2)
- Aeolian dust ripples : their occurrence, morphometrical characteristics, dynamics and origin (1)
- Aerodynamic entrainment thresholds and dislodgement rates on impervious and permeable beds (1)
- Aerodynamic roughness of gravel surfaces (1)
- Aerodynamical properties of an air layer affected by vegetation (1)
- Causes of the fetch effect in wind erosion (1)
- Crescentic dunes at Schiermonnikoog, the Netherlands (1)
- Dynamic controls on wind erosion and dust generation on west-central Free State agricultural land, South Africa (1)
- Energy exchange at a glacier surface: an alternative to aerodynamic methods of measurement (1)
- Estimation of winter precipitation in a high-altitude catchment of the Eastern Italian Alps: validation by means of glacier mass balance observations (1)
- Evidence for direct suspension of loessial soils on the Columbia Plateau (1)
- Kleinräumige und zeitliche Variabilität von Feinstaub und Grobstaub sowie Stickstoffdioxid in Berlin (1)
- Micrometeorological characteristics of a rubber plantation on Hainan Island, China (1)
- Relations between aerodynamic and surface roughness in a hyper-arid cold desert : McMurdo dry valleys, Antarctica (1)
- Saltating particles, playa crusts and dust aerosols at Owens (dry) Lake, California (1)
- Some aspects of transgressive dunefield and transverse dune geomorphology and dynamics, south coast, South Africa in Coasts : erosion and sedimentation. (1)
- Special issue. Aeolian environments (1)
- The estimation and evapotranspiration of wheat field - An improved energy-aerodynamic resistance model (1)
- The role of desert shrub size and spacing on wind profile parameters (1)
- Aerodynamic roughness of gravel surfaces
- The AA. report detailed results with respect to the aerodynamic roughness of different gravel surfaces from wind tunnel experiments. With the philosophy that aerodynamic roughness of gravel surfaces is a function of gravel size, spacing and the near
- -surface airflow characteristics, the specific purposes are to define the change of aerodynamic roughness length with wind speed, gravel size and coverage and roughness Reynolds number; and establish prediction models for aerodynamic roughness length
- The estimation and evapotranspiration of wheat field - An improved energy-aerodynamic resistance model
- Results and discussion of the energy balance-aerodynamic resistance model for estimating the evapotranspiration of crops.
- Aerodynamic entrainment thresholds and dislodgement rates on impervious and permeable beds
- Using a range of grain sizes and flow conditions, the series of laboratory experiments reported here compares directly the aerodynamic entrainment of loose grains overlying fixed permeable sediment beds with that occurring over fixed impervious beds.
- Width, height and slope relationships and aerodynamic maintenance of barchans
- one-tenth of the width of the dune. The AA. attempt to assess the factors (particularly slope and aerodynamics) that act to produce and maintain the barchan dune shape.
- Aerodynamical properties of an air layer affected by vegetation
- of the aerodynamic properties, varying with wind speed is based on measurements carried out at the heat and water balance observation field in the Environmental Research Center between 1978 and 1980. The validity of theoretical relationships between the canopy
- Relations between aerodynamic and surface roughness in a hyper-arid cold desert : McMurdo dry valleys, Antarctica
- Formation of ventifacts in Antarctica is mainly a result of erosion by aerodynamic and vorticity processes, as well as by grain impact. Suspended particles of dust, silt and ice crystals are the agents of erosion as they are transported
- in interfacial flow lines of the impacting airstream. Although salt weathering may play a part in the formation of concave basal surfaces and other basel features, perhaps by initiating or enhancing wind-eroded features, the predominant force is aerodynamic.
- would dislodge one or more particles upon impact with the surface; 2) the aerodynamic feedback effect in which the aerodynamic roughness height is increased by saltation of particles; 3) the soil resistance mechanism, which is largely an expression
- are the zero plane displacement, d, and aerodynamic roughness parameter, Z0. Results and discussion.
- In this paper, the micrometeorological characteristics of rubber tree stands, heat balance, radiative and aerodynamic properties are analyzed with data for three years (April 1986 to March 1989).
- This paper describes the existence and maintenance (a day at least) of some unusual crescentic dunes on a frozen beach at Schiermonnikoog. These crescentic dunes displayed a markedly aerodynamic shape, and had a plan view similar to that of barchans
- ) processes play a role in dust ripple dynamics : an aerodynamic process and an impact process, of which the first causes an upwind and the second a downwind migration of the ripples.
- On the South African south coast, transgressive dunefields are the dominant dune complex. The aerodynamics and sand transport of one small (1 m high) transverse dune were examined on a tabular dunefield. The point where sand movement is initiated
- characteristics are calculated including the albedo, radiation temperature, emissivity, aerodynamic and canopy resistances. The results are used to test parameterizations to calculate several heat fluxes, including the fraction of energy used in evaporation.
- different types of pebbles. Aerodynamic flow separation and diverging and converging airflow play an important role in the process of dust deposition on stone-covered surfaces.
- Une expression simplifiée de la résistance aérodynamique d'un couvert végétal. (Application à la mesure des flux de masse et d'énergie). (A simplified expression for the aerodynamic resistance over uniform surfaces)
- Energy exchange at a glacier surface: an alternative to aerodynamic methods of measurement
- surface groups with similar emission behaviour and aerodynamic characteristics were identified: (1) sand surfaces, (2) rough stone surfaces and (3) flat crusted surfaces. These results are comparable with field studies of natural erosion events and similar
Kleinräumige und zeitliche Variabilität von Feinstaub und Grobstaub sowie Stickstoffdioxid in Berlin
- to an influence of climatic elements and weather types, but coarse particles to a lesser extent than PM 2.5 (particles with an aerodynamic diameter
- This paper presents field evidence of dust entrainment by direct aerodynamic suspension in the absence of significant saltation. They propose to examine whether saltation was occurring by utilizing actual friction velocity and roughness height