Human responses to middle Holocene (Altithermal) climates on the North American GreatPlains
Adaptation ; Amérique du Nord ; Archéologie ; GreatPlains ; Holocène ; Occupation humaine ; Paléo-environnement ; Paléo-écologie ; Site archéologique ; Sécheresse
The purpose of this review is threefold : to summarize middle Holocene climates and environments of the GreatPlains that would have affected human foragers; to assess the potential impact of middle and late Holocene geomorphic processes
Major snowfall events in the GreatPlains : temporal aspects and relative importance
Chute de neige ; Dynamique de l'atmosphère ; Etats-Unis ; GreatPlains ; Neige ; Siècle 20 ; Série chronologique ; Variabilité interannuelle ; Variation saisonnière ; Variation spatiale
The aim of this paper is to develop a better understanding of the spatial and temporal aspects of central GreatPlains snowstorms by : identifying trends in the frequency of snow events from the winter of 1940 to the winter of 1993; determining
Late Holocene alluvial chronology and climate change in the central GreatPlains
Amérique du Nord ; Datation C 14 ; Fluviatile ; GreatPlains ; Géochronologie ; Holocène ; Quaternaire ; Stratigraphie ; Variation climatique
General synchrony between late Holocene fluvial chronologies of the central GreatPlains suggests climatic control of fluvial activity. The episodes of incision are tentatively correlated with different climate regimes, illustrating the difficulty
Az alfoldi varosfejlodés elmult évszazada és az orszagos településhalozat-fejlesztési koncepcioi. (Development of towns in the last hundred years on the Great Hungarian Plain and the present development plan for the national settlement pattern)
The implementation of basic concepts such as the development of towns according to their status in a planned hierarchical organization, or the intensive development of particular areas presented important problems on the Great Hungarian Plain
. The A. had investigated the above topic for a long time. The first part of his investigation, the development of towns in the Great Hungarian Plain is presented in this essay. (CK).
A foldtani ismeretek fejlodése az Alfold medencéjérol. (Progress in geological knowledge of GreatPlain)
In 1964 a new geological mapping started in the GreatPlain with engineering geological, agrogeological and hydrogeological purposes to disclose close-to-surface rock and ground water conditions at a depth of 10 metres. Mapping-scale: 1 to 100000
. In addition along two sections Quaternary and Upper Pliocene strata were revealed by medium depth bore-hole (100 to 1500 m) to get a knowledge of the younger history of the GreatPlain and to disclose the best aquifer strata under the surface and the quantity
A dél-alfoldi tervezési-gazdasagi korzet infrastrukturalis ellatottsagarol. (On the infrastructural level of the South GreatPlain planning-economic region)
Néhany megjegyzés az alfoldi agrarvarosok külterületi népességének alakulasarol. (Some remarks about the population changes in the dispersed farmsteads around the agrarian towns of the Great Hungarian Plain)
One of the most interesting components of the Hungarian settlement network is the system of dispersed farmsteads on the Great Hungarian Plain. Great changes took place during the last two decades and this process was closely followed by Hungarian
Invasive saltcedar (Tamarix) : its spread from the American southwest to the northern GreatPlains
Barrage ; Bassin-versant ; Biogéographie ; Colonisation végétale ; Cours d'eau ; Distribution spatiale ; Dynamique de la végétation ; Eau ; Etats-Unis ; GreatPlains ; Montana ; Nebraska ; North Dakota ; Siècle 20 ; South Dakota ; Tamaris ; Vent
This research had 3 goals : 1) to analyze and document the historical and present distribution of saltcedar in the northern GreatPlains; 2) to explain how saltcedar reached its northern distribution in the United States via ornamental and erosion
in the northern GreatPlains. This was followed by rapid natural dispersal northward by water and wind through the Wind/Bighorn system and into the Yellowstone and Missouri rivers in Montana.
This study uses a physically based snow-cover model to examine the influence of energy fluxes on northern GreatPlains snow-depth decreases. Over a 25-year period during the month of February, the model is run for 19 stations distributed across
This paper explains the detection of slackwater deposits within a humid climatic setting and use of these deposits in paleoflood reconstruction. Assessing the flood frequency distribution of rare floods in the south-central GreatPlains
Maximum de fin de nuit en hiver et au printemps, d'après-midi ou de début de nuit en été, de fin de soirée ou de nuit en automne. Le schéma classique (pluies nocturnes en plaine, pluies d'après-midi en montagne) ne se vérifie que pour des intensités
Aquifer ; Deuterium ; Great Basin ; Groundwater ; Isotope analysis ; Oxygen 18 ; Palaeohydrology ; Tritium ; United States of America
This study interprets relative groundwater ages, distinguishes vertical and lateral flow paths, and evaluates paleoclimatic implications of isotopic stratification of groundwater beneath the U.S. High Plains.
Evidence of active dune sands on the GreatPlains in the 19th century from accounts of early explorers
Changement global ; Dendrochronologie ; Dune ; Effet de serre ; Eolien ; Etats-Unis ; Great Basin ; Géographie historique ; Sécheresse ; Température ; Végétation
Aeolian features ; Dendrochronology ; Drought ; Dune ; Global change ; Great Basin ; Greenhouse effect ; Historical geography ; Temperature ; United States of America ; Vegetation
cases for these periods of greater eolian activity are droughts, accompanied by higher temperatures, which greatly lowered the precitation-to-evapotranspiration ratio and diminished the cover of stabilizing vegetation. Dune fields in the GreatPlains
Centre ruraux et voie de développement de la Grande Plaine de Hongrie
Centre rural ; Développement social ; Développement économique ; Hongrie ; Peuplement ; Plaine
Economic development ; Hungary ; Plain ; Rural centre ; Settlement ; Social development
Agrarian towns are dominant elements of the settlement system on the Great Hungarian Plain. In this study, A. discusses the main features of the so-called GreatPlain development paths which resulted a settlement system completely different from
Salt dissolution features in saline lakes of the northern GreatPlains, western Canada
Large-scale salt dissolution is an important process affecting the sediments of many of the saline lakes in the northern GreatPlains region of western Canada. The most easily recognized features of this salt karst are water-filled chimneys