Shoreline forms and deposits in Gallocanta Lake (NE Spain)
Climatic variation ; Lacustrine sediment ; Lake ; Lake level ; Quaternary ; Semi-arid area ; Shoreline ; Spain ; Zaragoza
This study attempts to deduce the present and past shoreline dynamics of a small shallow lake. Gallocanta Lake is located in the central Iberian Chain, NE Spain, within a typically Mediterranean semi-arid region.
Imja glacier lake has rapidly expanded in area as glacial ice on the east side has melted. If this melt rate continues, collapse of a terminal moraine could cause a devastating outburst flood. AA recommend immediate action to lower the lake level
Lake Michigan beach-ridge and dune development, lake level, and variability in regional water balance
Aerial photography ; C 14 dating ; Dune ; Holocene ; Lake ; Lake level ; Michigan ; Palaeoclimatology ; Quaternary ; United States of America ; Water balance
This paper reports the results of AMS radiocarbon dates of plant macrofossils associated with dune formation and growth, determines the historical relationships among beach-ridge formation, lake-level fluctuation, and regional climatic variation
, and finally provides an interpretation of lake-level and regional climate history based on dune morphology and the radiocarbon chronology of ridge formation.
History of the Puula Lake Complex, Central Finland, and shifts in its outlet
C 14 dating ; Deglaciation ; Finland ; Lake ; Lake level ; Palaeo-environment ; Palynology ; Quaternary ; Shoreline
Events associated with shifts in the outlet of a complex of large lakes in Central Finland are studied by means of levellings of ancient shorelines, trend surface analysis, pollen anallysis and radiocarbon dating. This paper determines how and when
the shifts in outlet occurred and what other changes in the lake and river system have taken place during postglacial times. Attention is also paid to the deglaciation of the lake complex and its isolation from the Baltic basin.
A recent downward expansion of shoreline shrubs at Lake Bienville (subarctic Quebec)
Canada ; Climatic variability ; Ecosystem ; Lake ; Lake hydrology ; Lake level ; Lake shore ; Quebec ; Scrub ; Vegetation
This paper aims to yield evidence, in a large subarctic lake environment, of the intricate relationship between shrub population development and waterlevel fluctuations over the last decades, and to provide a framework for the interpretation
Buried soils in a perched dunefield as indicators of Late Holocene lake-level change in the Lake Superior Basin
Datation C 14 ; Dune ; Eolien ; Etats-Unis ; Holocène ; Lac ; Lake Superior ; Michigan ; Niveau lacustre ; Paléo-écologie ; Paléosol ; Quaternaire ; Stratigraphie
Aeolian features ; C 14 dating ; Dune ; Holocene ; Lake ; Lake level ; Michigan ; Palaeo-ecology ; Palaeosol ; Quaternary ; Stratigraphy ; United States of America
This study uses soil stratigraphy and 14C dating to explore connections among lake levels, characteristics of buried soils, and Holocene dunefield evolution. If periods of high and low sediment supply occured, a record of buried soils may elucidate
timing of periods of stability and instability along the banks, thereby providing an indirect record of changes in lake levels within the Lake Superior basin.
Nutrient relationships of greek lakes: water eutrophication monitoring, assessment and forecasting
Correlation ; Eutrophication ; Forecast ; Greece ; Hydrochemistry ; Lake ; Model ; Multiple regression ; Nutrient
In this study an attempt is made to present the relationships that describe the co-effects of the various nutrients, the abiotic factors and lake morphology for Greek lakes.
Varves in a proglacial lake, Sermilik, South East Greenland
Cold area ; Greenland ; Lacustrine sedimentation ; Lake ; Proglacial lake ; Sediment transport ; Varves
Three cores collected from a proglacial lake with an Axelsson corer are x-rayed. The stratification is interpreted as varves. The cores cover periods of sedimentation with a duration from 5-23 years. The average thickness of the varves vary from 1.9
Glacial meltwater in Lake Huron during Early Postglacial Time as inferred from single-valve analysis of oxygen isotopes in ostracodes
Analyse isotopique ; Eau de fonte ; Etats-Unis ; Great Lakes ; Hydrochimie ; Lac ; Lac proglaciaire ; Niveau lacustre ; Oxygène 18 ; Paléogéographie ; Quaternaire
Great Lakes ; Hydrochemistry ; Isotope analysis ; Lake ; Lake level ; Meltwater ; Oxygen 18 ; Palaeogeography ; Proglacial lake ; Quaternary ; United States of America
δ18O measurements of benthic ostracodes are used to reconstruct the δ18O history of Lake Huron and Georgian Bay water between 10,600 and 7600 14C yr B.P. This δ18O record was calibrated using a comparison of the δ18O values of modern ostracodes
Aral Region ; Brackish environment ; Ecosystem ; Fauna ; Flora ; Former USSR ; Impact ; Lake ; Salinity ; Soviet Central Asia
This paper deals with a pragmatic aspect of the Aral Sea problem. The question is how does salt (or salinity) per se effect the demise of a lake's ecosystem?
The recent Lake Babati floods in semi-arid Tanzania. A response to changes in land cover?
Deforestation ; Flood ; Human impact ; Lake ; Photointerpretation ; Precipitation ; Semi-arid area ; Soil degradation ; Tanzania ; Water balance
This article reviews the two explanations for Lake Babati floods. Three methods were used: 1) compiling and analyzing relevant data on regional rainfall and Lake Babati levels; 2) developing a conceptual hydrological model of the catchment
Opportunities for pollen stratigraphic analysis of shallow lake sediments: the example of Lake Balaton
Relying on several decades of research experience, ever more new methods and methodological approaches, the opportunities of the application of palynological analysis for shallow lake sediments are summarised. New findings are also mentioned
Sediments from Rapid Lake document glacial and vegetation history in the Temple Lake valley of the Wind River Range, Wyoming over the past 11,000 to 12,000 yr. Radiocarbon age determinations on basal detrital organic matter from Rapid Lake
and Temple Lake bracket the age of the Temple Lake moraine, suggesting that the moraine formed in the late Pleistocene.
High (ground) water levels and dune development in central Australia: TL dates from gypsum and quartz dunes around Lake Lewis (Napperby), Northern Territory
Australia ; Dating ; Dune ; Gypsum ; Lake ; Lake level ; Northern Territory ; Palaeo-environment ; Palaeoclimate ; Palaeohydrology ; Quaternary ; Thermoluminescence
In Australian Quaternary studies, one of the major tasks is to date the episode of high-lake-level events prior to the last maximum and to answer whether all these lacustrine phases were simultaneously at their maxima in different climatic zones
. The answer will promote the understanding of palaeoclimate and palaeohydrology. This paper reports the results of TL dating of Lake Lewis gypsum and quartz dunes.
Lake evolution in the Tengger Desert, Northwestern China, during the last 40,000 years
C 14 dating ; Carbonate ; China ; Desert ; Lake level ; North-Western China ; Palaeo-environment ; Palaeoshore ; Pleistocene ; Quaternary ; Semi-arid area
Climatic changes inferred from lacustrine deposits and lake-level fluctuations in northwestern and central China are mainly based on paleoclimatic records from the Tibetan Plateau, while there is still a lack of data relating to the semiarid/arid
desert regions of Inner Mongolia. In the Tengger Desert, different paleolake levels at Baijian Hu are documented by six paleoshorelines and stratified lake carbonates. Here, presentation of the results on the lake history and environmental change
Ecosystem ; Geographical information system ; Hungary ; Lake ; Loess ; Sediment budget ; Soil erosion ; Watershed
The aim of this paper is the assessment of soil and nutrient loss in a tributary catchment of Lake Balaton, including geoecological aspects of the lake ecosystem and of the slopes mantled by loess.
Particle-size evidence for source areas of charcoal accumulation in Late Holocene sediments of eastern North American lakes
Charbon de bois ; Etats-Unis ; Granulométrie ; Great Lakes ; Holocène ; Minnesota ; Méthodologie ; New York State ; Ontario ; Palynologie ; Paléo-écologie ; Paléoclimatologie ; Pennsylvania ; Quaternaire ; Sédiment lacustre ; Wisconsin
Charcoal ; Grain size distribution ; Great Lakes ; Holocene ; Lacustrine sediment ; Methodology ; Minnesota ; New York State ; Ontario ; Palaeo-ecology ; Palaeoclimatology ; Palynology ; Pennsylvania ; Quaternary ; United States of America
Two methods of analyzing charcoal in sediment reveal changes in charcoal accumulation across temperate eastern North America during the last several hundred years. The AA. used these methods to compare charcoal accumulation at 14 lakes from