inscription
PORTAIL D'INFORMATION GÉOGRAPHIQUE

Résultats de la recherche (1810 résultats)

Affinez votre recherche

Par Collection Par Auteur Par Date Par Sujet Par Titre Par ville ? Par pays ? Par continent ?
Méthodes et résultats d'une reconstruction du climat entre 1525 et 1863: l'exemple suisse
  • Méthodes et résultats d'une reconstruction du climat entre 1525 et 1863: l'exemple suisse
  • Climat ; Climat historique ; Glacier ; Géographie physique ; Montagne ; Petit Age glaciaire ; Reconstitution climatique ; Siècle XVI-XIX ; Suisse ; Variation climatique ; Variation glaciaire
  • The A. describes the methods used for the reconstruction of climate between 1525 and 1863, from various observations. The A. presents the structure of the so-called Petit Age Glaciaire in the Switzerland based on the global study: from sixteenth
The climate during the younger Dryas stadial. Comparing global atmospheric simulation experiments with climate reconstructions based on geological evidence
  • The climate during the younger Dryas stadial. Comparing global atmospheric simulation experiments with climate reconstructions based on geological evidence
  • Atmospheric circulation ; Climatic variation ; Europe ; Global change ; Holocene ; Lateglacial ; Model ; Northwestern Europe ; Palaeoclimatology ; Quaternary ; Regional geology ; Simulation
  • The aim of this book is to make a climatic reconstruction of the Late Glacial/early Holocene transition in NW Europe by means of geological evidence and to compare this reconstruction with the simulation results of an atmospheric general circulation
Climatic reconstruction in historical times based on weather records
  • Climatic reconstruction in historical times based on weather records
  • Climat ; Géographie de l'Asie ; Géographie historique ; Japon ; Paléoclimatologie ; Petit âge glaciaire ; Siècle 17-19 ; Variation climatique
  • This paper tries to review the recent studies on the climatic reconstruction of Japan in historical times using weather records. Also it discusses the possibility and effectiveness of the quantification of historical data sources. An attempt is also
Reconstructing the palaeoclimate of Jaeren, Southwestern Norway, for the period 1821-1850, from historical documentary records
  • Reconstructing the palaeoclimate of Jaeren, Southwestern Norway, for the period 1821-1850, from historical documentary records
  • Climatic variation ; Historical geography ; Index ; Little ice age ; Methodology ; Norway ; Palaeoclimatology ; Temperature ; Winter
  • In this paper, documentary data containing qualitative information on climate, in the form of a diary written by the farmer I.G. Grude, and two newspapers, were used for the reconstruction of the palaeoclimate at Jaeren, in the county of Rogaland
  • , during the period 1821-50. An index method to quantify the qualitative climate data was developed and used for a low-resolution reconstruction of winter, summer and annual temperatures. A high-resolution climate reconstruction of temperature
  • and precipitation for the winter of 1837/38 is also presented. The climate reconstructions are compared to an instrumental temperature series from Bergen, for the same period.
On climatic analogs in paleoclimatic reconstruction
  • On climatic analogs in paleoclimatic reconstruction
  • Analogue climatique ; Géographie physique ; Macroclimat ; Microclimat ; Méthodologie ; Paléoclimatologie ; Reconstruction paléoclimatique
  • ) Environment and climate change on time scales from near instantaneous to millions of years. (3) Climate is multidimensional (a vector), not a single scalar datum. (4) Biotic assemblage changes in response to environmental (including climatic) changes
  • are expressed primarily in terms of reproductive success. One may conclude from the corollaries to these axioms that perfect analogs cannot be found for any Holocene climate, but that partial analogs (transfer equations) may still be used if allowance is made
Attempts to reconstruction of climate in historical age using the record of plant-phenology
  • Attempts to reconstruction of climate in historical age using the record of plant-phenology
  • Climat ; Géographie historique ; Japon ; Phénologie ; Printemps ; Température ; Variation climatique ; Végétation
  • Climate ; Climatic variation ; Historical geography ; Japan ; Spring ; Temperature ; Vegetation
CLIMATE MODELS IN PALAEOCLIMATIC RECONSTRUCTION
  • CLIMATE MODELS IN PALAEOCLIMATIC RECONSTRUCTION
The reconstruction of past climate during the historical period
  • The reconstruction of past climate during the historical period
Climatic fluctuations in northern Patagonia during the last 1 000 years as inferred from tree-ring records
  • Climatic fluctuations in northern Patagonia during the last 1 000 years as inferred from tree-ring records
  • A multiple regression model is used to reconstruct summer temperature departures in northern Patagonia on the basis of tree-ring data. Finally, the temperature reconstruction is compared with other proxy records of climatic variation in Patagonia
  • to assess its correspondence to local climatic records.
Paleoclimatic reconstruction in northern Oman based on carbonates from hyperalkaline groundwaters
  • Paleoclimatic reconstruction in northern Oman based on carbonates from hyperalkaline groundwaters
  • This paleoclimatic reconstruction for the past 35,000 years for northern Oman is based on an unusual approach using travertines and fracture calcites associated with hyperalkaline springs. This reconstruction shows a dominantly wet late Pleistocene
  • up to 19,000 years B.P., when a phase of climatic deterioration began, leading to a period of hyperaridity which dominated from 16,300 to 13,000 yr B.P. The early Holocene pluvial occurred from 12,500 to 6 500 yr B.P. and was followed by renewed
  • climatic deterioration and the current phase of hyperaridity.
200 years of European temperature variability : insights from and tests of the proxy surrogate reconstruction analog method
  • 200 years of European temperature variability : insights from and tests of the proxy surrogate reconstruction analog method
  • Climate ; Climate reconstruction ; Climatic variability ; Europe ; Methodology ; Nineteenth Century ; Temperature ; Time series ; Twentieth Century
  • Climat ; Europe ; Méthodologie ; Reconstitution climatique ; Siècle 19 ; Siècle 20 ; Série chronologique ; Température ; Variabilité climatique
  • Afin de remédier à un défaut récurrent des reconstructions climatiques, qui est de sous-estimer la variabilité, les AA. ont mis au point la méthode PSR (Proxy Surrogate Reconstruction) qu'ils ont appliquée aux températures mensuelles de la période
Abrupt changes in an 8000-year precipitation reconstruction for Nevada, the Western USA
  • Abrupt changes in an 8000-year precipitation reconstruction for Nevada, the Western USA
  • Climate reconstruction ; Climatic change ; Dendroclimatology ; Dendrology ; Holocene ; Nevada ; Palaeoclimatology ; Precipitation ; Quaternary ; United States of America
  • A scanning t-test algorithm for detecting multiple time-scale abrupt changes in the level of a time-series was used to analyze an 8000 year time series of annual precipitation which was reconstructed from tree rings for the Nevada Climate Division 3
  • in the western USA. The results suggest that the precipitation reconstruction series is quite valuable for climate-change research on multi-centurial time scales in the western USA, and that the scanning t-test and coherency detection algorithms may have a wide
Reconstruction of annual temperature (1590-1979) for Longmire, Washington, derived from tree rings
  • Reconstruction of annual temperature (1590-1979) for Longmire, Washington, derived from tree rings
  • Annual growth records from trees at timberline in the Cascade Range of Washington are correlated with variations in temperature and snow depth and used to reconstruct climatic variation in the past.
Polare Eisbohrkerne. Eckpfeiler der Klimarekonstruktion
  • Les carottes glaciaires polaires : piliers de la reconstruction climatique
  • Recherche sur les paléo-climats
  • Climate ; Climate reconstruction ; Historical account ; Ice core ; Polar climate ; Polar region ; Records
  • Archive ; Carotte de glace ; Climat ; Climat polaire ; Historique ; Reconstitution climatique ; Région polaire
  • Ice cores from Greenland and Antarctica are unique archives for past climate change. They permit the reconstruction of changes in temperature and concentrations of the major greenhouse gases. The longest climate history so far comes from the latest
  • ice core from Dome Concordis (Antarctica) and covers the last 800.000 years. The second ice core was obtained from Dronning Maud Land and provides, for the first time, a detailed record of climate signals influenced by the southern Atlantic. Greenland
A 560-year record of Santa Ana fires reconstructed from charcoal deposited in the Santa Barbara Basin, California
  • A 560-year record of Santa Ana fires reconstructed from charcoal deposited in the Santa Barbara Basin, California
  • California ; Charcoal ; Climatic variation ; Dendroclimatology ; Dendrology ; Fire ; Palaeogeography ; Palynology ; Quaternary ; United States of America ; Varves
  • record reconstructed from tree rings to see if there is any relationship between climate and fire history.
  • This paper presents new charcoal evidence from the Santa Barbara Basin and represents the first high-resolution charcoal study spanning the prehistoric and historic periods in southern California. The AA. compare the charcoal record with a climate
Rainfall reconstruction using wood charcoal from two archaeological sites in South Africa
  • Rainfall reconstruction using wood charcoal from two archaeological sites in South Africa
  • Archeological site ; Charcoal ; Climatic variation ; Dendrology ; Drought ; Palaeoclimatology ; Precipitation ; South Africa
  • in archaeological charcoal samples can be used to reconstruct climatic conditions at the time the wood was burned.
  • This paper discusses an original technique for climate research that could provide a reliable proxy rainfall record going beyond the reach of the historic record. The basic hypothesis is that measurements of xylem vessel size and frequency
A new reconstruction of temperature variability in the extra-tropical Northern Hemisphere during the last two millennia
  • A new reconstruction of temperature variability in the extra-tropical Northern Hemisphere during the last two millennia
  • Climate reconstruction ; Climatic variability ; Climatic variation ; Climatic warming ; First Century ; Historical climate ; Little ice age ; Middle Ages ; Northern hemisphere ; Temperature ; Twentieth Century ; World
  • Climat historique ; Hémisphère Nord ; Monde ; Moyen Age ; Petit âge glaciaire ; Reconstitution climatique ; Réchauffement climatique ; Siècle 1 ; Siècle 20 ; Température ; Variabilité climatique ; Variation climatique
  • A new temperature reconstruction with decadal resolution, covering the last two millennia, is presented for the extratropical Northern Hemisphere (90–30°N), utilizing many palaeo-temperature proxy records never previously included in any large-scale
  • temperature reconstruction. The amplitude of the reconstructed temperature variability on centennial time-scales exceeds 0.6°C. This reconstruction is the first to show a distinct Roman Warm Period c. ad 1–300, reaching up to the 1961–1990 mean temperature
Precipitation variation in the Pacific Northwest (1675-1975) as reconstructed from tree rings
  • Precipitation variation in the Pacific Northwest (1675-1975) as reconstructed from tree rings
  • Années 1675-1975 ; California ; Dendroclimatologie ; Etats-Unis ; Géographie de l'Amérique ; Histoire du climat ; Oregon ; Pacific States ; Précipitation ; Reconstitution climatique ; Siècle 17 ; Siècle 18 ; Siècle 19 ; Siècle 20 ; Sécheresse
Climate response functions for bigcone spruce : a mediterranean climate conifer
  • Climate response functions for bigcone spruce : a mediterranean climate conifer
  • Results of the response function analysis have several important implications for the use of bigcone spruce chronologies to reconstruct climate history in southern California. Growth is positively associated with precipitation in all months
  • of the current year, so that tree-ring indices should serve as good surrogates of total annual rainfall and runoff. However, growth is also related to spring and summer temperatures. The climate-growth system for bigcone spruce is relative by simple
  • and consistent at a site, and thus especially appropriate for dendroclimatic reconstruction.
A preliminary reconstruction of rainfall in north-central China since A.D. 1600 from tree-ring density and width
  • A preliminary reconstruction of rainfall in north-central China since A.D. 1600 from tree-ring density and width
  • The AA. report preliminary reconstructions of spring and early summer rainfall based on tree-ring densities and widths at Huashan at the northeastern extreme of the Qinling Mountains. These reconstructions are compared with independent climate