Seasonal and regional characteristics of U.S. streamflow trends in the United States from 1940 to 1999
Climatictrend ; Precipitation ; Seasonal variation ; Spatial distribution ; Stream ; Stream flow ; United States of America ; Water resources ; Watershed
Années 1940-1999 ; Bassin-versant ; Cours d'eau ; Distribution spatiale ; Ecoulement fluvial ; Etats-Unis ; Précipitation ; Ressource en eau ; Tendance du climat ; Variation saisonnière
The aims are to assess runoff trends in the conterminous United States for the 60-year period 1940-1999, across the entire range of measured discharges (from minimum to maximum); to characterize the regional distribution of these trends by water
-resources region; to identify seasonal shifts in the timing of minimum, median, and maximum flows within each water-resources region; and to explain the observed pattern of runoff trends in terms of previously reported trends in U.S. precipitation.
This paper studies the change of streamflow and the impact of climatic variability conditions on regional hydrological cycle in the headwater of the Tarim River Basin. This study investigates possible causes of observed trends in streamflow
Climate ; Climatictrend ; Climatic variability ; Global change ; Ocean atmosphere interaction ; South Africa ; Temperature ; Time series
Afrique du Sud ; Années 1960-2003 ; Changement global ; Climat ; Interaction océan-atmosphère ; Série chronologique ; Température ; Tendance du climat ; Variabilité climatique
Recent trends from Canadian Permafrost Thermal Monitoring Network Sites
Air temperature ; Canada ; Climatic change ; Climatictrend ; Cold area ; Northwest Territories ; Periglacial features ; Permafrost ; Temperature ; Thermal regime ; Twentieth Century
Canada ; Changement climatique ; Northwest Territories ; Pergélisol ; Périglaciaire ; Régime thermique ; Siècle 20 ; Température ; Température de l'air ; Tendance du climat ; Zone froide
This paper presents recent results from permafrost thermal monitoring sites primarily operated by the Geological Survey of Canada, CSG, and other federal government agencies, and discusses recent trends in permafrost conditions. The trends
in permafrost temperature are consistent with trends in air temperature observed since the 1970s. Local conditions however, influence the response of the permafrost thermal regime to these changes in air temperature.
Trends in fog frequency and duration in the southeast United States
Atmospheric moisture ; Climatictrend ; Fog ; Forecast ; Linear regression ; Southern United States ; United States of America ; Virginia
Brouillard ; Etats-Unis ; Etats-Unis du Sud ; Humidité atmosphérique ; Prévision ; Régression linéaire ; Tendance du climat ; Virginia
This study identifies the trends and frequency of fog events across the south-eastern United States. A simple linear regression was performed on hourly datasets for annual and seasonal fog-event days and on fog duration. The majority of Virginia
Application of artificial neural networks in climatology: a case study of sunspot prediction and solar climatetrends
Climatic variation ; Climatology ; Forecast ; Global change ; Methodology ; Radiation ; Solar activity
Global temperature trends on time scales of years to centuries have recently been shown to be related to volcanic aerosols, carbon dioxide levels, and solar activity. The most visible and well-studied indicators of solar variability are dark areas
and discuss the climatic implications of the findings.
Trends in the long-term variability of groundwater discharge
On global Climate warming
Action anthropique ; Climat ; Cours d'eau ; Débit ; Eau ; Eau souterraine ; Mesure de terrain ; Qualité de l'eau ; Ressource en eau ; Régime fluvial ; URSS ; Variation annuelle ; Variation saisonnière
Annual variation ; Climate ; Discharge ; Flow regime ; Ground survey ; Ground water ; Human impact ; Seasonal variation ; Stream ; USSR ; Water ; Water quality ; Water resources
An analysis of long-term observations of the groundwater level regime and groundwater discharge made it possible to establish tendencies to grouping of dry and wet year series. The different direction of trends depends both on the direct human
impact on groundwater and on the indirect effect (man-induced climatic transformations).
Atmospheric circulation ; Climatictrend ; Europe ; Iberian Peninsula ; Mountain ; Portugal ; Spain ; Temperature ; Time series
Circulation atmosphérique ; Espagne ; Europe ; Montagne ; Portugal ; Péninsule ibérique ; Série chronologique ; Température ; Tendance du climat
The aims of this contribution are to highlight significant trends in temperatures series of several mountains stations of the Iberian Peninsula and to compare those trends with the evolution of some nearby low-altitude stations. Finally, we analyze
Altitude dependency of trends of daily climate extremes in southwestern China, 1961-2008
Altitude ; China ; Climate ; Climate extreme ; Climatic change ; Climatictrend ; Climatic warming ; Precipitation ; Southwest China ; Temperature
Altitude ; Années 1961-2008 ; Changement climatique ; Chine ; Chine du Sud-Ouest ; Climat ; Extrême climatique ; Précipitation ; Réchauffement climatique ; Température ; Tendance du climat
The AA. examine the altitude dependence of trends of daily climate extremes in southwestern China between 1961 and 2008. A total of 12 indices of temperature extremes and 11 indices of precipitation extremes at 111 stations in southwestern China
at altitudes of 285-4700 m were examined. Significant correlations of temperature extremes and elevation included the trends of diurnal temperature range, frost days, ice days, cold night frequency and cold day frequency. Regional trends of growing season
sensitivity of climate extremes to elevation in southwestern China in the context of recent warming.
Impact of soil moisture-atmosphere coupling on European climate extremes and trends in a regional climate model
Climate ; Climatic anomaly ; Climatictrend ; Europe ; Impact ; Precipitation ; Soil ; Soil moisture ; Temperature
Années 1958-2006 ; Anomalie climatique ; Climat ; Europe ; Humidité du sol ; Impact ; Précipitation ; Sol ; Température ; Tendance du climat
pluviométriques. Les interactions entre l'humidité du sol et la basse atmosphère peuvent aussi expliquer une part non négligeable de la tendance du climat observée sur les années 1958-2006, surtout en ce qui concerne les températures maximales. - (JPB)
Trends in the near-zero range of the minimum air-temperature distribution
Air temperature ; Climate ; Climatictrend ; Cluster analysis ; Freeze-thaw cycle ; Freezing ; Society-environment relationship ; Spatial distribution ; Temperature ; United States of America ; Winter
Analyse des groupes ; Années 1948-2011 ; Climat ; Cycle gel-dégel ; Distribution spatiale ; Etats-Unis ; Gel ; Hiver ; Relation société-environnement ; Température ; Température de l'air ; Tendance du climat
Examining the trend of the number of near-zero °C temperatures (NZT) days over the conterminous USA for the period of 1948–1949 through 2010–2011, the AA. found three distinct spatial clusters. The most distinctive spatial clusters are found along
the West Coast (positive temperature trends leading to a decrease in NZT days), the High Plains and Northern Rockies (positive temperature trends leading to an increase in NZT days), and the southeastern USA (negative temperature trends leading
to an increase in NZT days). While trends in the number of NZT days are linked to changes in mean minimum air temperature, increasing minimum temperature leads to a positive trend at NZT days only at some locations.
Trends to changes in seasonal aspects of the climate in Poland
Air temperature ; Atmospheric pressure ; Climate ; Climatictrend ; Climatic warming ; Continentality ; Nineteenth Century ; Poland ; Precipitation ; Seasonal variability ; Time series ; Twentieth Century
of decreasing continentality of climate in Poland, a marked warming in the winter-spring period and a general weakening of seasonal contrasts regarding the climate.