Two well dated Holocene sediment records bordering the Denmark Strait region have been used to reconstruct past climate variability. The content of biogenic silica, clastic and organic material and moss in a lacustrine record from lake N14 has been
used to infer past variability in precipitation and temperature in southern Greenland. Sedimentologic and petrologic composition of sand in a shelf sediment record from the Djúpáll trough is used to infer past variability in the northwestern storm
activity on northwestern Iceland. The aim is to provide both an overall view of the long-term Holocene development in the region and to analyse climate variability anf triggering on a submillennial timescale.
Fabric variability associated with periglacial mass-wasting at Eagle Summit, Alaska
Examen de la série de variations dans la structure des unités de modelés. Influence des variables clastiques et du micro-environnement. Relations processus-structure.
Reach scale variability of turbulent flow characteristics in a gravel-bed river
The AA. examine the effects of roughness elements on the spatial variability of the mean flow velocity profiles and of the properties of turbulent flow structures at the reach scale. The experiment was carried out in 2 reaches of 25 m long
in the Eaton North River (Québec). At the reach scale, the distribution of individual roughness elements does not greatly control the spatial variability of turbulent flow properties.
Climatic cycle ; Climatic variability ; Dendroclimatology ; Dendrology ; Finland ; Holocene ; Ocean atmosphere interaction ; Palaeoclimatology ; Solar activity ; Summer ; Temperature
A tree-ring proxy of summer temperature anomalies for northern Finland for the past 7500 yr was analyzed using Fourier spectrum and wavelet approaches. Multicentennial (250-450 yr) variability is present in the proxy record during most of the time
range. This variability is suggested to reflect low-frequency variability in the North Atlantic Oscillation. Century-scale (90-130 yr) variation is another important feature of the tree-ring proxy data during the Holocene and may be attributed
to Glessberg solar activity variations. In addition, a 2000-yr quasi-period is found in this temperature proxy data, similar to the millennial-scale variability present in records from the North Atlantic region.
Recent studies regarding the climate variability in South America during the 20th century, revealed the existence of climate cycles that influenced the hydrologic conditions in the Paraná River basin. How that variability affected the channel
Variable resolution spatial interpolation using the simple recursive point Voronoi diagram
Méthode qui permet un accroissement progressif de la densité d'un ensemble de points initial, qui peut servir de base pour interpoler des surfaces à résolution variable. Les concepts de Voronoi servent à ordonner l'espace en mosaïque, compte tenu de
that demonstrate major changes in these variables over the last 2000 years. A comparison between atmospheric C 14 and these changes in climate demonstrates a first-order relationship between a variable Sun and climate. The relationship is seen on a global scale.
Résultats d'une analyse exploratoire des associations entre la prévalence de VIH/SIDA (variable dépendante) et une série de mesures socio-économiques reflétant la transition (variables indépendantes).
The implications for paleodietary and paleoclimatic reconstructions of intrapopulation variability in the oxygen and carbon isotopes of teeth from modern feral horses
samples and with analyses of the δO 18 values of precipitation at nearby Hatteras, North Carolina. The variability of both δO 18 and the δC 13 values among individuals within this population demonstrates that horses from relatively homogenous temperate
Temporal and spatial variability of soil pH in patterned-ground chronosequences : Jotunheimen, Norway
. Sorted circles and sorted nets showed significant changes in soil pH across the chronosequences. All glacier forelands showed a higher soil pH with depth in patterned ground features. The importance of microsite variability and associated disturbance
Monthly mean temperatures and monthly precipitation totals at 6 stations from the Cappadocian sub-region were analysed in order to detect the response of the variability in the Cappadocian climate to the variability of the North Sea - Caspian
Conditions for water circulation in the Eg basin provided the background to a description of that river's long-term variability of outflow and hydrological regime. The importance of different sources in the formation of streamflow was also estimated
, and the influence of Lake Hovsogol on the variability of the outflow demonstrated. The authors sought to account for discharge anomalies of the Eg river below L. Hovsogol. - (BJ)
L'A. détermine un ensemble de variables quantitatives qui caractérisent les formes urbaines à l'échelle de l'agglomération, et qui permettent de distinguer entre compacité et étalement. Quatre variables mesurent quatre dimensions de la forme urbaine
Alberta ; Canada ; Climatic variability ; Delta ; Flood ; Floodplain ; Human impact ; Hydraulic works ; Palaeo-ecology ; Palaeo-environment ; Palaeohydrology ; Quaternary
The aim of this research is to assess the impacts of both natural and anthropogenic factors, ranging from climatic variability and change to the influence of river flow regulation resulting from hydroelectric power generation at the headwaters