Lake Michigan beach-ridge and dune development, lakelevel, and variability in regional water balance
Aerial photography ; C 14 dating ; Dune ; Holocene ; Lake ; Lakelevel ; 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.
Cores of Holocene calcareous sediments (marls) from 2 small lakes (Putaanlampi and Ylimmäinen Kuivajärvi) in Kuusamo, NE Finland, were analysed for pollen, Cladocera, and diatoms, to investigate lake-level changes.
Simulating the Holocene lake-level record of Lake Bysjön, southern Sweden
C 14 dating ; Evapotranspiration ; Holocene ; Lake ; Lakelevel ; Model ; Palynology ; Precipitation ; Rill wash ; Sweden
This paper investigates whether it is possible to reproduce the observed lake-level changes at Bysjön through the Holocene by combining the effects of precipitation changes and known changes in radiation and temperature regimes, and whether
this results in more plausible estimates of changes in Holocene precipitation. These investigations are carried out using a physically based lake-catchment model, driven by known changes in radiation and temperature regimes and by systematic changes
Late Pleistocene and late Holocene lake highstands in the Pyramid Lake subbasin of Lake Lahontan, Nevada, USA
C 14 dating ; Lake ; Lakelevel ; Nevada ; Palaeoclimate ; Quaternary ; Shoreline ; Stratigraphy ; United States of America
subbasin. The AA. briefly compare their findings to previously published post-highstand Lahontan lake-level curves and other regional paleoclimate indicators.
Shoreline geomorphology, shoreline stratigraphic position, and radiocarbon dates of organic material obtained from trench and quarry exposures provide evidence for 2 significant post-Lahontan highstand lake transgressions in the Pyramid Lake
Holocene lake-level fluctuations of Lake Aricota, southern Peru
Andes ; C 14 dating ; Climatic variation ; Comparative study ; Holocene ; Lake ; Lakelevel ; Palaeo-environment ; Peru ; Quaternary
Lacustrine deposits exposed around Lake Aricota, a lake dammed by debris flows, provide a middle to late Holocene record of lake-level fluctuations. Chronological context for shoreline deposits was obtained from radiocarbon dating of vascular plant
remains and other datable material with minimal C 14 reservoir effects (
with a major lowstand at Lake Titicaca. Comparisons with other marine and terrestrial records highlight emerging contradictions over the nature of mid-Holocene climate in the central Andes.
Glacioisostasy and lake-level change at Moosehead Lake, Maine
C 14 dating ; Deglaciation ; Geophysics ; Glacial isostasy ; Holocene ; Lake ; Lakelevel ; Model ; Palaeo-environment ; Stratigraphy ; Thermoluminescence ; United States of America
Reconstructions of glacioisotatic rebound based on relative sea level in Maine and adjacent Canada do not agree well with existing geophysical models. In order to understand these discrepancies better, the AA. investigated the lake-level history
of 40-km-long Moosehead Lake in northwestern Maine. The rebound history inferred from lake-level data is consistent with previous interpretations of nearby relative sea-level data, which indicate a significantly steeper and faster-moving ice-proximal
Bathymetry ; Czech Republic ; Glacial lake ; Lake ; Lakelevel ; Limnology ; Thematic map
The main aim of research was to make a precise ground plan to characterize the depth conditions of the lake basin and to determine the altitude of the lakelevel. The bathymetric maps of the second largest glacial lake in Czechia. - (MS)
Geological, geomorphological, archaeological and historical records allow a reconstruction of the hydrological development of Lake Müritz (Mecklenburg-Vorpommern, Northeast-Germany) in the Late Quaternary. After a very high lake-level
in the Weichselian the lake-level in the early Holocene was some metres lower than at present. In the Mid- and Late Holocene the lake-level rose up which fluctuations. Lake-level fluctuations before Medival Times seem to have been caused by climatic changes, lake
-level fluctuations in Medival and in modern Times are due to anthropogenic influence.
Buried soils in a perched dunefield as indicators of Late Holocene lake-level change in the Lake Superior Basin
Aeolian features ; C 14 dating ; Dune ; Holocene ; Lake ; Lakelevel ; Michigan ; Palaeo-ecology ; Palaeosol ; Quaternary ; Stratigraphy ; United States of America
Datation C 14 ; Dune ; Eolien ; Etats-Unis ; Holocène ; Lac ; Lake Superior ; Michigan ; Niveau lacustre ; Paléo-écologie ; Paléosol ; Quaternaire ; Stratigraphie
This study uses soil stratigraphy and 14C dating to explore connections among lakelevels, 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 lakelevels within the Lake Superior basin.
Greatest lake period and its palaeo-environment on the Tibetan Plateau
China ; Lake ; Lakelevel ; Monsoon ; Palaeo-environment ; Palaeoclimate ; Palaeolake ; Plateau ; Tibet
The greatest lake period means that the lakes are in the stage of their maximum areas. As the paleolake shorelines are widely distributed in the lake basins on the Tibetan Plateau, the lake areas during the greatest lake period may be inferred
by the last highest lake shorelines. They are several even ten times larger than that at present. The occurence of maximum areas of lakes marked the very humid period on the Plateau and was also related to the stronger summer monsoon during that period.
Age and height of last highest lakelevels on the Tibetan Plateau and their environmental significance
China ; Grain size distribution ; High mountain ; Lacustrine sediment ; Lake ; Lakelevel ; Palaeo-environment ; Palaeoclimate ; Tibet
The Tibetan Plateau is the biggest lake distributed area in China, in which fluctuation of lakelevels is one of the important indicators to the variations of aridity and humidity. It is one of the hot issues in the study of paleo-climate and paleo
Reconstruction of Holocene precipitation patterns in Europe using pollen and lake-level data
Europe ; Holocene ; Lakelevel ; Model ; Palaeoclimatology ; Palaeogeography ; Palynology ; Precipitation ; Quaternary
Lake-level data can be used to refine paleoclimate reconstructions based on pollen data. This approach is illustrated for the European Holocene. Reconstructions of temperature and precipitation are presented here for 9000, 6000, and 3000 yr B.P
. The maps demonstrate that a substantial improvement in quantitative palaeoclimate estimation can be achieved by using pollen and lake-level data in combination.
Lake-level reconstructions and paleohydrology of Birch Lake, Central Alaska, based on seismic reflection profiles and core transects
Alaska ; C 14 dating ; Cold area ; Holocene ; Insolation ; Lake ; Lakelevel ; Palaeo-environment ; Palaeoclimate ; Palaeolimnology ; Palaeomagnetism ; Palynology ; Seismic reflection
Lake-level history during the late Pleistocene and Holocene for Birch Lake, Alaska, was reconstructed using seismic profiles and multiproxy sedimentary analyses including sedimentology, geochemistry, magnetic susceptibility, and palynology
. The major restructuring of the climate system during deglaciation evidently generated a complex set of fluctuations in effective moisture in interior Alaska, which likely affected eolian processes and vegetation development, as well as lakelevels.
Late Quaternary variations in the level of paleo-Lake Malheur, eastern Oregon
Archeological site ; C 14 dating ; Dune ; Holocene ; Lake ; Lakelevel ; Oregon ; Palaeolake ; Quaternary ; United States of America
-level fluctuations and spatial variation. Beginning ca. 5000 yr B.P., based on shells in the Malheur Lake dune islands, the Malheur Lake system's environmental history is marked by fluctuating water levels, a pattern apparently characterizing
The present Malheur Lake system, which includes Malheur, Harney, and Mud Lakes, contains one of the largest freshwater marsh habitats in the United States. Although the lake typically is no more than 3 m deep, it can experience very dynamic water
Tree-ring dating of extreme lakelevels at the Subarctic-Boreal interface
Atmospheric circulation ; Canada ; Cold area ; Dendrochronology ; Dendrology ; Lake ; Lakelevel ; Meltwater ; Precipitation ; Quebec ; Snow ; Spring ; Subarctic area ; Summer ; Twentieth Century
The dates of extreme water levels of 2 large lakes in northern Quebec have been recorded over the last century by ice scars on shoreline trees and sequences of reaction wood in shore trees tilted by wave erosion. According to the modern record
, spring lake-level rise is due to increased snowfalls since the 1930s. However, the absence of erosional marks in a large number of years since 1930 suggests a high frequency of low-water-level years resulting from dry conditions. The position
of the arctic front in summer influences the path of the cyclonic air masses, which control summer precipitation and, consequently, summer lakelevels in the area.
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 lakelevel
Highest pluvial-lake shorelines and Pleistocene climate of the Western Great Basin
Climatic variation ; Drainage network ; Lake ; Lakelevel ; Nevada ; Palaeo-environment ; Pleistocene ; Tectonics ; United States of America
that is not seen in global marine oxygen-isotope records. The previously unknown lakelevels also reflect significant changes in tectonics, and (or) drainage-basin configurations, and could have facilitated migration of aquatic species in the Great Basin.
Shoreline altitudes of several pluvial lakes in the western Great Basin of North America record successively smaller lakes from the early to the late Pleistocene. This decrease in lake size indicates a long-term drying trend in the regional climate
Glacial-lake outburst erosion of the Grand Valley, Michigan, and impacts on glacial lakes in the Lake Michigan Basin
Catastrophe ; Flood ; Glacial erosion ; Glacial features ; Glacial lake ; Ice breakup ; Lakelevel ; Michigan ; Palaeogeography ; Quaternary ; United States
The purpose of this paper is to document the outburst origin of the Grand Valley and to explore the implications of these events upon interpretations of the timing and processes of lake-leved changes in glacial Lake Chicago.
Measurement, correlation, and mapping of glacial Lake Algonquin shorelines in northern Michigan
Cartography ; Correlation ; Global Positioning System ; Isostasy ; Lake ; Lakelevel ; Michigan ; Proglacial lake ; Quaternary ; Shoreline ; United States of America
The aim of this article is to produce accurate lake-level curves for Main Lake Algonquin and several post-Main lakes, evaluate/correlate the post-Main lakes in light of new data on shoreline elevations, and accurately map the areas inundated
by the various lakelevels. The AA. use differential global positioning system (DGPS) technology to measure elevations of unquestionable Algonquin shorelines at wave-cut bluffs. They then correlate their shoreline data to previous estimates of post-Main Algonquin
features in an attempt to clarify the sequence of post-Algonquin lakes.
The effects of forest diching and water level changes on sediment quality in a small lake, Perhonlampi, Central Finland
C 14 dating ; Finland ; Geochemistry ; Lacustrine sediment ; Lake ; Lakelevel ; Principal components analysis ; Soil erosion ; Stand treatment ; Water quality
The aim of this paper was to explore the effects of ditching and natural/artificial water level changes on sedimentation, total metal, P and S concentration and speciation of Cu, Fe, Mn and Zn compounds in a small lake. The clearest geochemical