Evidence from the Neva River valley, Russia, of the Holocene history of Lake Ladoga
C 14 dating ; Diatom ; European part of Russia ; Holocene ; Lake ; Lake level ; Palaeogeography ; Peat ; Pollen analysis ; Saint Petersburg ; Stratigraphy
Two new sections have been discovered in the River Neva Valley, which connects Lake Ladoga with the Gulf of Finland of the Baltic Sea. The radiocarbon dates, as well as pollen and diatom analyses of the new sections, support previous ideas
that the connection between Lake Ladoga and the Gulf of Finland opened as a result of the last great rise of the lake level, which was named the ladoga transgression. The evidence from the River Neva also confirms that there was no connection in this area between
the Baltic Sea and lake Ladoga at the time of the Ancylus Lake, because of the existence of uninterrupted peat deposition from Preboreal time.
Outburst floods from glacier-dammed lakes: the effect of mode of lake drainage on flood magnitude
Cold area ; Drainage ; Flood ; Forecast ; Glacial lake ; Glacial surge ; Lake ; Lake hydrology ; Meltwater ; Model ; Pic discharge
Published accounts of outburst floods from glacier-dammed lakes show that a significant number of such floods are associated not with drainage through a tunnel incised into the basal ice, the process generally assumed, but rather with ice-marginal
drainage, mechanical failure of part of the ice dam, or both. The AA. develop a simple physical model of the breach-widening process for non-tunnel floods. Calculations based on the model simulate quite well outbursts from Lake George, Alaska.
This paper documents changes in the regional climates of northern Eurasia, as shown by lake records, through the late Quaternary. There is a gradual transition to modern conditions after ca. 5000 yr B.P. Although these broad-scale patterns
are interrupted by shorter term fluctuations, the long-term trends in lake behavior show a clear response to changes in insolation and glaciation.
Uranium-series dating of carbonate (tufa) deposits associated with Quaternary fluctuations of Pyramid Lake, Nevada
C 14 dating ; Dating ; Geochronology ; Isotope dating ; Lake ; Lake level ; Nevada ; Pleistocene ; Quaternary ; Tufa ; United States of America ; Uranium
This study provides a record for the timing and magnitude of lake-level fluctuation in the Pyramid Lake subbasin during part of the last 400,000 yr. The AA. use uranium-series methods to determine the ages of some of the tufa varieties discussed
The early postglacial history of Lake Sirkkajärvi, Southern Finland, with implications to the G stage of the Baltic
C 14 dating ; Diatom ; Finland ; Lacustrine sediment ; Lake ; Lake level ; Palaeogeography ; Palynology ; Pollen diagram ; Postglacial ; Quaternary
Radiocarbon-dated basal sediments of the highest lake in southern Finland, were studied for organic content, pollen and diatoms in order to follow early developmental phases of the lake, and by inference, Late Weichselian water level changes
Lake ; Nevada ; Palaeogeomorphology ; Quaternary ; United States of America ; Valley
Previous studies of Adrian Pass concluded that it was an abandoned channel of the Walker River. The evidence presented in this study suggests that Adrian Pass was formed by overflow of Lake Lahontan, the second-largest Great Basin Quaternary lake
, from the lower Walker River Basin to the Carson Desert Basin. Walker River occupancy of Adrian Pass during post-Lake Lahontan time was relatively brief. - (SLD)
A coupling three dimensional baroclinic model of Biwa Lake air-water system
Atmospheric dynamics ; Cyclone ; Honshu ; Hydrodynamics ; Japan ; Lake ; Numerical model ; Seasonal variation ; Water circulation ; Water temperature ; Wind
A numerical model coupling atmosphere with hydrodynamics is set up in this paper, and is applied in the experimental study of Lake Biwa. Discussion of the results.
A hydrometeorological approach to the forecasting of inflows to alpine lakes
Atmospheric circulation ; Forecast ; Glacial lake ; Glacier fluctuation ; Hydrometeorology ; Lake ; New Zealand ; Regression analysis ; Seasonal variation ; Snow ; South Island ; Water balance
, situated in the central Southern Alps, New Zealand. Multiple regression analysis is used to develop empirical expressions that explain a high percentage of both monthly and seasonal variance in natural inflows to both lakes, Pukaki and Tekapo. Finally
Czech Republic ; Geomorphology ; Lake ; Limnology ; Research
The local glaciers in the Quaternary period during the Ice Age have carved deep, intensively eroded basins with steep, high slopes. In the Šumava Mts. eigth of such basins remained filled with water as glacial lakes. In 1906 was made the first
mapping of the Prášilské Lake's profile and depth. Recent geomorphological and limnological research has been carried out in 1994. 33 depth profiles were measured, a geomorphological map (1: 10 000), a new ground plan, thermic, colour and transparency
Aquatic ecosystem ; Chemical pollution ; China ; Degradation ; Geochemistry ; Ichtyofauna ; Impact study ; Lacustrine sediment ; Lake ; Pollution ; Sampling ; Water quality
Distribution and degradation of alkyl benzene sodium sulfonate, and its harmful effect on carp in Dianchi Lake. Toxic effects of alkyl benzene sodium sulfonate on incubation of carp (Cyprinus carpio rabeifusecus) eggs in Dianki Lake. Biochemical
The transitional zone between the boreal forest and the northern coastal area of the Arctic Ocean in the far north of Fennoscandia is a globally important ecotone. The pollen stratigraphy of 4 lakes, Lakes Hopseidet and Ifjord in Norway and Lakes
Skaidejavri and Rautuselkä in northern Finland, was studied to reveal the post-glacial dynamics of the vegetation in this ecotone. These lakes were selected to represent the different vegetation zones within the area and the altitudinal changes
Late-Holocene formation of Lake Michigan beach ridges correlated with a 70-yr oscillation in global climate
C 14 dating ; Climate oscillation ; Climatic variation ; Dendrochronology ; Global change ; Holocene ; Lake ; Lake level ; Michigan ; Palaeo-environment ; Shoreline ; United States of America
Radiocarbon geochemistry of modern and ancient Arctic Lake systems, Baffin Island, Canada
The accuracy of Arctic lake chronologies has been assessed by measuring the C 14 activities of modern carbon sources and applying these isotopic mass balances to dating fossil lake materials. Radiocarbon measurements of components of the lacustrine
Aeolian dust transport and deposition by foehn winds in an alpine environment, Lake Tekapo, New Zealand
Observation from an automatic weather station and anemograph network are used in conjunction with recorded dust deposition rates to identify principle sources of wind blown dust within an alpine lake basin. Meteorological observations made
throughout the study indicate that foehn windstorms provide ideal conditions for the initiation of aeolian processes, including dust storm genesis. Potential dust roses were determined for 2 sites within the lake basin.