inscription
PORTAIL D'INFORMATION GÉOGRAPHIQUE

Résultats de la recherche (895 résultats)

Affinez votre recherche

Par Collection Par Auteur Par Date Par Sujet Par Titre
  • Normal mode energetics of the general circulation during the FGGE winter
  • Atmosphere ; Atmospheric circulation ; Energy balance ; Model ; Winter
  • A diagnostic energetics scheme is developed in order to investigate the energy flows in the three-dimensional spectral domain in the atmosphere. This energetics scheme is applied to the data during the winter from December 1978 to February 1979.
  • The record-breaking Winter of 1976-1977. The wild Winter of 1976-1977 in New York State
  • Thermal characterization of winters in the 20th century in Kraków
  • Air temperature ; Climatic variability ; Cracow ; Freezing ; Global change ; Poland ; Season ; Temperature ; Time series ; Twentieth Century ; Weather type ; Winter
  • Based on Kraków's measurement series of air temperature in the 20th century an attempt was made to analyse the winter season by means of some criteria which are important for the thermal conditions which-in turn-influence natural processes
  • and phenomena. The first day with mean daily air temperature
  • days and sums of frost. Special attention was paid to extreme winters because of their thermal conditions as well as their frequency and variability.
  • The distribution of precipitation caused by passages of lows in winter in Japan
  • Daily and seasonal patterns of foraging behaviour in wintering geese
  • Regional division of winter weather and local winds in Japan
  • In order to represent the weather distribution of Japan related to the winter monsoon, the modified method of Jacob's synoptic climatology was adopted. Airflow patterns were decided for each of five regions in Japan. - (SGA)
  • Spatial variability of midtropospheric circulation patterns and associated surface climate in the United States during ENSO winters
  • Atmospheric circulation ; Climatic variation ; Precipitation ; Temperature ; Troposphere ; United States ; Weather type ; Winter
  • This study identifies the dominant synoptic circulation patterns and associated temperature and precipitation departures that occur during ENSO winters. Using standardized departures of 500 mbar heights over North America and the North Pacific Ocean
  • , a subjective classification of the anomaly maps for winter months identified as warm ENSO events identifies three basic categories of 500 mbar standardized anomaly patterns.
  • The impacts of ENSO, PDO, and local SSTS on winter precipitation in India
  • Atmospheric circulation ; El Niño ; India ; Ocean atmosphere interaction ; Precipitation ; Surface temperature ; Teleconnection ; Winter
  • Monthly precipitation data are assembled to analyze the impact of global teleconnections, namely ENSO, PDO, and local sea surface temperature (SSTs) on winter rainfall across the Indian subcontinent from 1925 to 1998. Canonical correlation analysis
  • reveals one statistically significant vector for the precipitation occurring over the subcontinent and one for the predictor variables. The results of the study will be useful for greater efficiency in the forecasting of winter precipitation.
  • Influence of Arctic oscillation on winter climate over China
  • Arctic Ocean ; Atmospheric circulation ; China ; Climate ; Ocean atmosphere interaction ; Precipitation ; Regression analysis ; Temperature ; Twentieth Century ; Winter
  • In this study the relationship between the Arctic Oscillation (AO) and climate in China in boreal winter are investigated. Correlation analysis for the last 41 years shows that the winter temperature and precipitation in China change in phase
  • Patterns of winter dessication in krummholz forms of Abies lasiocarpa at treeline sites in Glacier National Park, Montana, USA
  • Biogeography ; Drought ; Fir tree ; Freezing ; Montana ; Mountain ; National park ; Snow cover ; Tree line ; United States of America ; Winter
  • The objectives of this research are to : quantify the amount of winter dessication that occurred at treeline sites in Glacier National Park, Montana, during the winter of 1998/1999; determine if the variability in winter dessication between
  • climatic factors may be responsible for inter-annual winter dessication variability.
  • Thermal differentiation of winters in the Carpathian Mountains altitudinal profile during the period 1961/62-1990/91
  • Advection ; Air temperature ; Altitude ; Atmospheric circulation ; Carpathian Mountains ; Cracow ; Frost ; Mountain ; Poland ; Temperature ; Urban effect ; Winter
  • This paper attempts an evaluation of winter thermal differentiation in the Carpathian altitudinal profile in relation to some external and internal factors of the montane climatic system. Mean monthly, mean daily and daily maximum air temperature
  • were taken, for 3 stations representing different altitudinal climatic zones, in the period 1961/62-1990/91. The variability of the dates of winter commencement and end, winter duration and thermal indices were analysed, as was the relation between
  • Extreme summer and winter temperatures in the Czech Lands after A.D. 1500 and their Central European context
  • Air temperature ; Climate ; Climatic trend ; Climatic variability ; Czech Republic ; Summer ; Temperature ; Time series ; Winter
  • Extremely cold/mild winters (DJF) and extremely cold/warm summers (JJA) in the Czech Lands were derived from series of temperature indices based on documentary evidence (1500–1854) and from series of air temperatures measured at the Prague
  • -Klementinum station (1771–2007) over the past 500 years. Altogether 24 cold winters, 23 mild winters, 18 cold summers and 21 warm summers emerged. Czech extremes were compared with the Central European temperature series and series of documentary-based
  • Variability of East Asian winter monsoon in Quaternary climatic extremes in North China
  • China ; Climatic variability ; Grain size distribution ; Loess ; Magnetic susceptibility ; Monsoon ; Palaeoclimatology ; Palaeosol ; Plateau ; Quaternary ; Shaanxi ; Winter
  • In order to examine high-frequency variations of East Asian winter monsoon in Quaternary climatic extremes, two typical loess-paleosol sequences in the Chinese Loess Plateau were investigated : Upper sand and Lower sand have been sampled at Luochuan
  • and Xifeng. The grain size and magnetic susceptibility were measured for all samples. The intensified winter monsoon events show periodicities, with a dominant cycle of approximately 1450 yr. Millenial-scale variations of the winter monsoon may be caused
  • Ice-volume forcing of East Asian winter monsoon variations in the past 800,000 years
  • Atmospheric circulation ; China ; Climatic variation ; Deglaciation ; Global change ; Grain size distribution ; Inland ice ; Isotope analysis ; Loess ; Monsoon ; Oxygen 18 ; Palaeoclimatology ; Plateau ; Quaternary ; Winter
  • The AA. use loess grain-size records derived from the Chinese Loess Plateau as a proxy indicator of the East Asian winter monsoon, and compare the winter monsoon record with global ice volume changes at both time and frequency domains. The possible
  • dynamic linkage between the variations in the winter monsoon circulation and global ice volume is addressed.
  • Winter Atlantic climate and snowfall in the south and central Appalachians
  • ; Weather forecast ; Winter
  • Winter snowfall over much of the south and central Appalachian region shows a significant inverse association with a winter index of the North Atlantic Oscillation (NAO) teleconnection pattern. The snowiest winters coincide with the negative phase
  • Extreme anomalies of winter air temperature in mid-latitude Europe
  • Advection ; Air temperature ; Atmospheric circulation ; Central Europe ; Europe ; Interannual variability ; Ocean atmosphere interaction ; Temperature ; Thermal anomaly ; Wind ; Winter ; Years 1990-99
  • The aim of this paper is to analyze the interannual variability which characterizes the late-winter surface air temperature in mid-latitude Europe, 45-60°N, and discuss its causes. The AA. analyze the interannual variability at its extreme
  • by comparing the warm-winter/early-spring of 1989/90 with the opposite scenario in 1995/96. They examine the influence of maritime-air advection in raising the winter air temperature in Europe.
  • Télvégi utburkolatkar vizsgalata a Kisvarda-Tornyospalca utvonalon. (Frost damage to road pavement after winter on the road between Kisvarda and Tornyospalca)
  • During the winter of 1980-81 serious damage occurred to public roads in Hungary. Weather, the properties of road fill material, the traffic of heavy vehicles and the quality of pavement have been proved to be major factors influencing the extent
  • Summer and winter regimes of runoff generation and soil erosion on cultivated loess soils (The Netherlands)
  • Monthly runoff and soil loss data of three fallow experimental plots are presented, comprising a summer and following winter season. Implications for runoff and erosion of climatic change, involving increased rainfall amounts or intensities
  • in summer or winter, are given.
  • Intermediate-scale sea ice-atmosphere interactions over high southern latitudes in winter
  • Associations between polar air cloud vortices ( polar lows ), as an indicator of intermediate-scale atmospheric activity, and the Antarctic sea ice, are examined for the Southern Hemisphere winter (June-September). Seven consecutive winters
  • Cold waves and winter monsoon in East Asia : with special reference to south China
  • Satellite Himawari images in winter 1986/87 and typical cold waves in relation to winter monsoon situations such as the cases in January and February 1963.