Analyse isotopique ; Chine ; Circulation atmosphérique ; Corée du Sud ; Eolien ; Géochimie ; Géochronologie ; Japon ; Loess ; Minéralogie ; Oxygène 18 ; Paléosol ; Poussière éolienne ; Pédogenèse ; Quaternaire ; Tempête de poussière ; Transport
The physical, chemical, mineralogical and geochemical characteristics of Asian long-range eolian dust, the dust flux in the Late Pleistocene and the Holocene, and the implications of Asian long-range eolian dust in terrestrial and atmospheric
The granulometrical border between eoliantransport in saltation and eoliantransport in suspension lies, according to the results of the experiment, at a diameter of about 63 m.
The effects of artificial pebble concentrations on eolian sand transport on a beach
Eolian processes and environments
Canada ; Concentration spatiale ; Eolien ; Expérimentation de terrain ; Galet ; Littoral ; New Brunswick ; Plage ; Sable ; Transport éolien ; Vitesse du vent
Aeolian features ; Aeolian transport ; Beach ; Canada ; Coastal environment ; Field experiment ; New Brunswick ; Pebbles ; Sand ; Spatial concentration ; Wind speed
Résultats de l'expérience de terrain réalisée sur une plage de sable dans le détroit de Northumberland, Nouveau-Brunswick, afin de mesurer les effets de la concentration de galets sur le taux de transport de sédiment éolien. Comparaison avec les
The role of wind direction in eoliantransport on a narrow sandy beach
Eolien ; Estuaire ; Etats-Unis ; Littoral ; New Jersey ; Transport éolien ; Vent ; Vitesse du vent
Aeolian features ; Aeolian transport ; Coastal environment ; Estuary ; New Jersey ; United States ; Wind ; Wind speed
Comparison of eoliantransport during five high-velocity wind events over a 29 day period on a narrow estuarine beach in Delaware Bay, New Jersey, USA, reveals the temporal variability of transport, due to changes in direction of wind approach
. Eoliantransport is greatest during low tide and rising tide, when the beach source area is widest and when drying of surface sediments occurs. The ability of the beach surface to supply grains to the air stream is limited on narrow beaches, but increased
Aeolian features ; Aeolian transport ; Dating ; Grain size distribution ; Iran ; Lateglacial ; Mountain ; Palaeo-environment ; Palaeosol ; Quaternary ; Sedimentary structure
The AA. report and interpret the significance of, an eolian sand ramp in the mountains that represent the southern margin of Ardakan Kavir. The well-sorted eolian sediments of the ramp contain talus beds and incipient paleosols. Morphology
and bedding structures imply that southeasterly winds were primarily responsible for deposition of the eolian sand. Optical dating shows that the sand was deposited near the last glacial maximum within about 5000 yr.
Eolian sand transport at the Belgian Coast : morphodynamic implications and use in coastal management
Belgium ; Coastal dynamics ; Coastal environment ; Eolian features ; Sand ; Sediment budget ; Sediment transport
Belgique ; Bilan sédimentaire ; Dynamique littorale ; Eolien ; Littoral ; Sable ; Transport sédimentaire
In order to obtain a better understanding of eolian sediment dynamics and its contribution to the total coastal sediment budget, fundamental research is carried out on the sand transport rates under various meteorological conditions. The extend
Aeolian features ; Aeolian transport ; Arid area ; Desert ; Dune ; Impact ; Israel ; Negev ; Vegetation ; Wind erosion
The AA. present results of bulk and net sand and dust deposition above and at the surface along a cross-dune transect in order to quantify sediment transport and input in mobile and stable eco-geomorphic units. Furthermore, the role of higher
Erosion and sediment yields as influenced by coupled eolian and fluvial processes : the Yellow River, China
Bassin-versant ; Bilan sédimentaire ; Charge en suspension ; Chine ; Domaine aride ; Eolien ; Erosion fluviatile ; Huanghe ; Transport sédimentaire
Aeolian features ; Arid area ; China ; Fluvial erosion ; Huang He ; Sediment budget ; Sediment transport ; Suspended load ; Watershed
yield in the zone. As a result, most of the previously stored eolian sand and material supplied by mass-wasting of loess can be transported to the major tributaries and the main stream of the Yellow River, resulting in the high specific sediment yield
Based on data from the middle Yellow River, a model of erosion and sediment yield is proposed to describe coupled eolian and fluvial processes in a transitional zone from arid to sub-humid climates, and to explain rapid erosion and a high sediment
Africa ; C14 dating ; Crète ; Desert ; Dust storm ; Eolian dust ; Eolian features ; Eoliantransport ; Greece ; Loess ; Northern Africa ; Palaeosol ; Pedogenesis ; Peloponnesus ; Quaternary ; Sahara ; Thermoluminescence
Afrique ; Afrique du Nord ; Datation C 14 ; Désert ; Eolien ; Grèce ; Kriti ; Loess ; Paléosol ; Pelopónnisos ; Poussière éolienne ; Pédogenèse ; Quaternaire ; Sahara ; Tempête de poussière ; Thermoluminescence ; Transport éolien
Studies of recent dustfall in the Western and Eastern Mediterranean islands and mainlands give support to the hypothesis of eolian dust deposition from Africa. It is probably an important contribution to soil formation, slope wash and stream
, forms an obstacle to longshore eolian and aquatic sediment movement. There is a clear mutual interaction between the choking of the channel and the nearby beach dynamics. The research highlights the importance of net longshore sediment transport, both
eolian and aquatic, in this part of the Belgian coast. It shows that important quantities of sand are moved in relatively short periods of time.
Les processus de formation de sel et de transport éolien dans la région bordant la mer d'Aral
Applied ecology ; Aral Sea ; Arid land ; Asian part of USSR ; Coastal environment ; Desertification ; Dust ; Ecological catastrophe ; Eolian erosion;Wind erosion ; Eolian features ; Eoliantransport ; Lake level ; Region ; Salt lake ; Soviet Central
Aral mer ; Catastrophe écologique ; Domaine aride ; Désertification ; Ecologie appliquée ; Eolien ; Erosion éolienne ; Lac salé ; Littoral ; Niveau lacustre ; Poussière ; Région ; Sel ; Srednjaja Azija ; Transport éolien ; URSS d'Asie
Response of eolian geomorphic systems to minor climate change : examples from the southern Californian deserts
California ; Couverture végétale ; Domaine aride ; Domaine semi-aride ; Désert ; Eolien ; Etats-Unis ; Humidité du sol ; Précipitation ; Transport éolien ; Variabilité climatique ; Variation climatique
Aeolian features ; Aeolian transport ; Arid area ; California ; Climatic variability ; Climatic variation ; Desert ; Plant cover ; Precipitation ; Semi-arid area ; Soil moisture ; United States of America
The response of eolian geomorphic systems to minor climate change can be examined through process-response models based on a combination of relations between short-term changes in climatic variables and eolian activity and the geologic
and geomorphic record of Holocene eolian activity. At both time scales, eolian activity in southern Californian deserts is strongly controlled by variations in precipitation. Remobilization of existing dormant dunes is a product of reduced vegetation cover
Evaluating eolian-climatic interactions using a regional climate model from Hanford, Washington (USA)
Changement global ; Climat régional ; Domaine semi-aride ; Dune ; Eolien ; Erosion éolienne ; Etats-Unis ; Fluctuation climatique ; Modèle ; Sable ; Transport éolien ; Variation climatique ; Vitesse du vent ; Washington
Aeolian features ; Aeolian transport ; Climate fluctuation ; Climatic variation ; Dune ; Global change ; Model ; Regional climate ; Sand ; Semi-arid area ; United States of America ; Washington ; Wind erosion ; Wind speed
A regional climate model (RCM) developed for the Hanford Site, Washington illustrates a potentially useful method for assessing eolian responses to regional climate change. The RCM is based on long-term relations between fundamental climatic
variables of precipitation, temperature, and wind speed. Modelled data are integrated into eolian-climatic scenarios through maps of eolian susceptibility, plots of sand dune mobility, and calculated trends of unvegetated dune sand volumes. Results
demonstrate the sensitivity of eolian-climatic interactions to small changes in precipitation.
Eolienne (SGAE) est analysée avec la dynamique dans les 3 aires qui le constituent : l'aire source, l'aire de transport et l'aire d'accumulation. Proposition d'une classification dynamique des dunes, combinant le bilan sédimentaire et le régime éolien
L'A. décrit les phénomènes des tempêtes de poussière dans les plaines, des brumes de poussière dans les piémonts et les montagnes. Le principal résultat du transport éolien de matière des plaines aux montagnes et de son dépôt dans les piémonts et