From the study the following aspects of the evolution of the sedimentary regime are characterized: 1establishment of an active bottom current circulation during the early Eocene, concomitant with a clear thermal stratification of the water masses
| 2development of a highly fluctuating bottom current regime during the Oligocene, spicule-rich contourites being implaced during periods of active bottom currents| 3changes in the sedimentary regime at the early middle Miocene boundary characterized
by decreasing bottom current and increasing sedimentation rates| 4active bottom current, decreasing dissolution and markel increase of the sedimentation rates in the early Pliocene, that contributed to active building of a sedimentary ridge at the foot
Permafrost thermal state in the polar northern hemisphere during the International Polar Year 2007-2009 : a synthesis
. A comparison is also made between the current state and previous ground thermal conditions in order to characterize longer-term changes. Improved knowledge about the permafrost thermal state is important for multidisciplinary polar research. Increased
This paper synthesizes the regional results and thereby characterizes the thermal state of permafrost for the polar regions of the Northern Hemisphere at the end of the Fourth International Polar Year (IPY) : North America, Nordic region and Russia
and the methodologies used and required to characterize it. Furthermore, the suitability of the currently most widely used approach, that of detection of ongoing fires on the basis of their emittance of thermal radiation, for the characterization of the fire regime
The composition of rock glaciers was sounded by a combination of conventional geophysical methods near the lower limit of mountain permafrost in the Swiss Alps. P-wave velocity, direct current (DC) resistivity and year-round ground surface
temperatures were measured on 32 talus-derived rock glaciers. The combination of these methods provides reliable thermal and structural information on subsurface deposits. In addition, mean annual ground surface temperatures are equally good indicators
In spite of current climatic warming, there is no noticeable increase in regional thermokarst in Central Yakutia. Periodic forest fires significantly increase soil thermal conductivity and progressive soil salinization is occurring; however
8-10 m within 50 years, and 20+ m within 300 years. Field observations show that current thermokarst has a tendency for fast (5-10+ cm/year) subsidence.
Mise en évidence, par télédétection HCMM, de modifications de la structure thermique des eaux littorales sud-armoricaines (France) par les courants de marée. (By HCMM remote sensing demonstrating thermal structural modifications due to tidal
currents in the coastal waters just south brittany (France))
Thhe current geomorphological processes in the area are mainly of glacial, glaciofluvial and ablual nature. The glacier fronts are often situated near the costline, and this seems to favour the formation of push features in recent and subrecent
moraines. Thermal erosion may lead to strong morphological transformation of vast areas. Climate, and thus the production of meltwater, ground temperature changes and differences in the development of the active layer are the most important factors
Atlantic Ocean ; Energy transfer ; Marine hydrology ; Model ; Ocean circulation ; Sea current ; South Atlantic Ocean ; Thermal exchange ; Water exchange
The AA. provide a summary of the current state of knowledge pertaining to the geophysical, thermodynamic and dielectric properties of snow on sea ice. They first give a detailed description of snow thermophysical properties such as thermal
and deformed sandy clasts that occur in the second unit. It appears that thermal erosion, short transport in a sediment-laden current and sudden sedimentation were responsible for the oversized sandy clasts that occur in the gravel glaciofluvial deposits
This review paper examines thermal conditions (active layer and permafrost), internal composition (rock and ice components), kinematics and rheology of creeping perennially frozen slopes in cold mountain areas. The aim is to assemble current
This paper contributes to the study of permafrost in the Pyrenees by reporting geoelectrical investigations and thermal measurements on the Little Ice Age (LIA) forefields of 2 glaciers. The aim was to assess the internal composition of sedimentary
bodies (debris rock glaciers and moraine deposits) located in this proglacial environment. Ground ice was propected using 2 DC (direct current) resistivity techniques. Results from the Posets and La Paul glaciers forefields are presented here
characteristics for this period have been supplemented by an analysis of the frequency of occurrence of extreme weather events (thermal and humid) in particular 10-year spells of the study period. The results obtained were compared both with the results
of an analogous investigation carried out for other areas of Central Europe and with the instrumental data from Warsaw. A review of the current state of knowledge concerning the variability of climate in Poland in historical time is also presented. - (BJ)
A simple model for current speed in tidal channels
Coastal environment ; Denmark ; Hydrodynamics ; Model ; Sea level ; Storm ; Tidal creek ; Tidal current ; Wind
This paper presents a simple non-distributed, PC-based model describing current speed in a tidal channel based on the continuity equation with tide gauge water level as the only time dependent input parameter. This model is tested in a tidal channel
in the Danish Wadden Sea. This type of model can be used to extend and/or complete time series of current speed in a particular tidal channel and to make quick estimates of the current speed, with a minimum of information and CPU consumption.