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Résultats de la recherche (583 résultats)

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  • Establishing research objectives to address issues of climate change
  • Changement global ; Effet de serre ; Programme de recherche ; Recherche
  • Global change ; Greenhouse effect ; Research ; Research programme
  • There are numerous possible expensive research projects that could address each of the many facets of the implications of global climate change. The paper describes a systematic process to identify and the structure the objectives of research
  • on global change. The result is a hierarchy of 81 important research objectives.
  • 1994
  • Polish National Committee of IGBP-Global Change: structures and activities
  • Global change: polish perspectives
  • Changement global ; Coopération internationale ; Niveau marin ; Pollution atmosphérique ; Pologne ; Programme de recherche ; Recherche ; Réchauffement climatique ; Variation climatique
  • Atmospheric pollution ; Climatic variation ; Climatic warming ; Global change ; International cooperation ; Poland ; Research ; Research programme ; Sea level
  • Statut et membres du Comité National Polonais du programme de recherche IGPB-Changement Global. Réunions et publications récentes.
  • 1994
  • Climate change and altered runoff in the semiarid portion of Mono Basin, Caifornia
  • Bassin-versant ; California ; Changement global ; Domaine aride ; Domaine semi-aride ; Ecoulement ; Etats-Unis ; Précipitation ; Variation climatique
  • Arid area ; California ; Climatic variation ; Global change ; Precipitation ; Runoff ; Semi-arid area ; United States ; Watershed
  • The purpose of this paper is to assess the hydroclimatic response of the semiarid portion of the Mono Basin to small changes in long-term mean temperature and precipitation. A climatic water budget model for the Cottonwood Creek and Bridgeport Creek
  • watersheds in the north-central portion of the Mono Basin is employed to simulate existing hydroclimatic processes and the alteration of these processes in response to climate change.
  • 1994
  • Climate change and agricultural production: an extensive averaged spatial-ecologic approach
  • Changement global ; Céréale ; Etude d'impact ; Plante cultivée ; Production agricole ; Scénario ; Simulation ; Variation climatique
  • Agricultural production ; Cereal ; Climatic variation ; Cultivated plants ; Global change ; Impact study ; Scenario ; Simulation
  • The approach allows the temporal impacts of climate change to be determined, measured in terms of the degree of adaptation of the agricultural sector to climate change. Use is made of a world agricultural commodity markets model, constructed
  • 1994
  • Natural and anthropogenic fluctuations and trends of climate change in Southern Poland
  • Global change: polish perspectives
  • Action anthropique ; Carpates ; Changement global ; Circulation atmosphérique ; Climatologie ; Dendroclimatologie ; Effet urbain ; Fluctuation climatique ; Insolation ; Montagne ; Perception de l'environnement ; Pologne ; Précipitation ; Série
  • Atmospheric circulation ; Carpathian Mountains ; Climate fluctuation ; Climatic variation ; Climatology ; Dendroclimatology ; Environmental perception ; Global change ; Human impact ; Insolation ; Mountain ; Poland ; Precipitation ; Temperature
  • Climatic changes in Southern Poland, including the Carpathian Mountains are shown in regional and local scale. There are discussed: changeability of the circulation indices during the winter season and fluctuations of the air temperatures based
  • on the instrumental observations in the mountain stations. The influence of climate is referred to the secular changes in the width of tree rings in Tatra Mountains and the thermal feelings of human body. Local changes of the radiation inflows are characteristic
  • 1994
  • Change and variability in climate and ecosystem decline in Aral Sea basin deltas
  • Action anthropique ; Aral ; Asie ; Changement global ; Delta ; Ecosystème ; Ressource en eau ; Srednjaja Azija ; Utilisation du sol ; Variabilité climatique ; Variation saisonnière
  • Aral ; Asia ; Climatic variability ; Delta ; Ecosystem ; Global change ; Human impact ; Land use ; Seasonal variation ; Soviet Central Asia ; Water resources
  • This paper concentrates on impacts that regional and global climate changes may have on deltaic ecosystems using deltas in the Aral Sea basin as an example. In addition to an assessment of regional climate change and variability
  • and their relationship to environmental conditions within inland river deltas, this paper examines the past development of the deltas (including consequences of human-induced alteration of the regional hydrologic cycle), climatic trends and ecosystem changes within them
  • , and the relationships among future climatic and ecosystem changes that may occur.
  • 1994
  • Changement social ; Choix du site ; Communication ; Congrès ; Décision ; Etats-Unis ; Localisation ; Ville
  • Communication ; Congress ; Decision ; Location ; Location choice ; Social change ; Town ; United States
  • The paper begins by defining a convention. It examines the selection of convention sites, documents the surge in convention activity, describes cross-sectional changes (1964-65 to 1990-91) in the spatial patterns of convention attendance
  • in the United States, and explores the implications of these patterns for students of social change and American metropolitan evolution.
  • 1994
  • Variations des glaciers et changement global
  • Argentine ; Changement global ; Fluctuation du glacier ; Glacier ; Glaciologie ; Mendoza
  • Argentina ; Glacier ; Glacier fluctuation ; Glaciology ; Global change ; Mendoza
  • Quelques généralités sur le changement global et les résultats d'une étude sur les variations du glacier Horcones Supérieur, région de l'Aconcagua, Mendoza. - (MZ)
  • 1994
  • Changement global ; Climatologie ; Concept ; Effet de serre ; Modèle ; Niveau marin ; Prévision ; Réchauffement climatique ; Variation climatique
  • Climatic variation ; Climatic warming ; Climatology ; Concept ; Forecast ; Global change ; Greenhouse effect ; Model ; Sea level
  • Major changes are occurring in the global warming debate. Popular alarmist views are giving way to more balanced assessments of the situation. There is now greater emphasis on the lack of consensus among climatologists on fundamental scientific
  • issues related to climate change.
  • 1994
  • Major changes are proposed fopr government map quality and coverage
  • Discussion of changes in map production policy of the United States Geological Service, which produces the topographic map series in the USA. - (DWG)
  • 1994
  • The diagnosis of climate change in Cracow against a background of circulation and local conditions
  • The multi-annual variability of thermal, solar and cloudiness conditions in Cracow was examined from the point of view of the impact of natural and anthropogenic factors on the climate change. The analysis concerned the annual air temperature range
  • (RAT) and daily ranges of air temperature (DAT) in january and july. Special attention has been paid to the climatic trends and changes of climatic continuity. Long-term changes of RAT reflect the impact of the circulation factors, these of DAT
  • 1994
  • Monitoring global change with phenology : the case of the spring green wave
  • Amérique du Nord ; Changement global ; Indice climatique ; Phénologie ; Réchauffement climatique ; Télédétection ; Végétation
  • Climatic index ; Climatic warming ; Global change ; North America ; Phenology ; Remote sensing ; Vegetation
  • Aux latitudes moyennes, les observations phénologiques s'avèrent d'un très grand secours pour détecter et suivre un éventuel changement climatique global. Exemple de la partie orientale du continent nord-américain avec, depuis 1961, une feuillaison
  • 1994
  • Calotte glaciaire ; Changement global ; Dynamique littorale ; Eustatisme ; Glacio-eustatisme ; Modèle ; Niveau marin ; Quaternaire ; Réchauffement climatique ; Séisme ; Tsunami
  • Climatic warming ; Coastal dynamics ; Earthquake ; Eustatism ; Glacio eustatic change ; Global change ; Ice sheet ; Model ; Quaternary ; Sea level ; Tsunami
  • change over the Late Quaternary, and the success or otherwise in trying to monitor ongoing global sea-level change.
  • 1994
  • Climate and environmental change at high northern latitudes
  • Action anthropique ; Arctique ; Changement global ; Effet de serre ; Forêt ; Glaciaire ; Ozone ; Pollution ; Stratosphère ; Toundra ; Variation climatique ; Zone froide
  • Arctic Region ; Climatic variation ; Cold area ; Forest ; Glacial features ; Global change ; Greenhouse effect ; Human impact ; Ozone ; Pollution ; Stratosphere ; Tundra
  • This is the second-year report on recent environmental changes at high northern latitudes (Boreal-Arctic). As in the previous one (Kullman, 1992) subjects and references are selective rather than comprehensive, with the overall aim to confront
  • 1994
  • Climatic variability, climatic change, runoff, and suspended sediment regimes in northern Canada
  • Canada ; Capacité de charge ; Changement global ; Charge en suspension ; Ecoulement fluvial ; Glacier ; Northwest Territories ; Pergélisol ; Périglaciaire ; Ruissellement ; Variabilité climatique ; Variation climatique ; Zone froide
  • Canada ; Carrying capacity ; Climatic variability ; Climatic variation ; Cold area ; Glacier ; Global change ; Northwest Territories ; Periglacial features ; Permafrost ; Rill wash ; Stream flow ; Suspended load
  • This paper examines some likely consequences of climatic warming on the runoff and sediment regimes of a very diverse group of fluvial systems. It is suggested that research on climatic change impacts should focus on the ware and sediments
  • 1994
  • Floodplain change in the Glenmalure Valley, South-East Leinster
  • This study describes reach-scale changes in floodplain form over a 25 km stretch of the Glenmalure River in south east Leinster and explains this variability in terms of downstream changes in geomorphological processes and geological inheritance
  • . The five floodplain types presented in this study provide important evidence of spatial and temporal changes in a river's ability to modify control variables within the constraints of geomorphic antecedence, particularly the buried bedrock topography
  • 1994
  • Catastrophe ; Changement global ; Coin de glace ; Eurasie ; Jakutija ; Modèle ; Pergélisol ; Réchauffement climatique ; Variation climatique ; Zone froide
  • Catastrophe ; Climatic variation ; Climatic warming ; Cold area ; Eurasia ; Global change ; Ice wedge ; Model ; Permafrost ; Yakutia
  • Since models of global warming predict that climatic changes will be greatest in the Arctic and might already be in progress, it is prudent to attempt to understand the rapidly changing thermal regime on Eurasian cold regions. In this paper
  • the A. tries to evaluate the probable catastrophic implications of global climatic change in the cold regions of Eurasia. The impact on Man activities in permafrost regions is discussed.
  • 1994
  • Polish Baltic coast: changes, hazards and management
  • Global change: polish perspectives
  • Aménagement du littoral ; Baltique mer ; Changement global ; Effet de serre ; Erosion des sols ; Littoral ; Niveau marin ; Pologne ; Protection du littoral ; Risque naturel ; Variation climatique
  • Baltic Sea ; Climatic variation ; Coastal environment ; Coastal management ; Coastal protection ; Global change ; Greenhouse effect ; Natural hazards ; Poland ; Sea level ; Soil erosion
  • Regional climate change for the Baltic Sea is discussed first, with particular emphasis on recent findings for sea level (mean and extrema) and storm intensity. More thought is being given to the general problem of land (primarily arable
  • ) degradation due to extended landward penetration of sea water due to the accelerated sea level rise (ASLR). Long-term coastline change is analysed on the basis of routine topographic and bathymetric data collected. Assessment of coast vulnerability to ASLR has
  • 1994
  • Channel and floodplain response to recent abrupt climate change: the Tyne Basin, northern England
  • Changement global ; Crue ; England ; Erosion fluviatile ; Hydrologie fluviale ; Lit fluvial ; Plaine d'inondation ; Royaume-Uni ; Transport sédimentaire ; Variabilité climatique
  • Climatic variability ; England ; Flood ; Floodplain ; Fluvial erosion ; Fluvial hydrology ; Global change ; River bed ; Sediment transport ; United Kingdom
  • This paper examines the timing, nature and magnitude of river response in upland, piedmont and lowland reaches of the Tyne Basin to high-frequency (20-30 year) changes in climate and flood regime since 1700 AD. Over this period fluvial activity has
  • been characterized by alternating phases of river-bed incision and stability coinciding with non-random, decadal-scale fluctuations in flood frequency and hydroclimate that appear to be linked to changes in large-scale upper atmospheric circulation
  • patterns. The results provide a valuable guide for forecasting probable drainage basin and channel response to future climate change.
  • 1994
  • Tendances du changement dans la structure urbaine de Budapest
  • Budapest ; Changement social ; Croissance urbaine ; Développement régional ; Développement urbain ; Espace urbain ; Géographie sociale ; Géographie urbaine ; Histoire urbaine ; Hongrie ; Population urbaine ; Siècle 20 ; Structure urbaine ; Ville
  • Budapest ; Hungary ; Regional development ; Social change ; Social geography ; Town ; Twentieth Century ; Urban area ; Urban development ; Urban geography ; Urban growth ; Urban history ; Urban population ; Urban structure
  • The A. outlines the simplified urban belts of Budapest with specific features and spatial processes of the population growth and changes. It can be stated that the consequences of the economic transition after 1989 affected these urban belts in very
  • different ways. The changes, taken place in the social and functional structure of Budapest are displayed by various socio-economic indicators. The sectorial and group interests concerning the spatial development of the town and the different urban belts
  • have gone through substantial changes - (JS)
  • 1994