Atmosphere ; Atmospheric electricity ; Cloud ; Diurnal variation ; GreatLakes ; Rainstorm ; Summer ; United States of America
Cloud-to-ground (CG) lightning observations for the warm season thunderstorms (May-September) of 1989 and 1990 were analyzed for the GreatLakes region. Diurnal variations in the frequency, spatial extent, flash density, amplitude, and polarity
Soils cool as climate warms in the GreatLakes region : 1951-2000
Années 1951-2000 ; Changement global ; Climat ; Etats-Unis ; GreatLakes ; Impact ; Michigan ; Modèle ; Neige ; Réchauffement climatique ; Sol ; Température du sol ; Wisconsin
Climate ; Climatic warming ; Global change ; GreatLakes ; Impact ; Michigan ; Model ; Snow ; Soil ; Soil temperature ; United States of America ; Wisconsin
of natural systems to slow atmospheric warming, and draw attention to the potential changes that are occurring in growing season characteristics, phenology, and spring runoff characteristics in the GreatLakes region.
GreatLakes ; 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
Balaton Lake ; Geomorphology ; History ; Hungary ; Lake ; Legislation ; Shoreline
This paper analyses the history and the present state of shoreline control of Lake Balaton. The first shoreline control activities around Lake Balaton commenced during the last years of the 19th century. In recent years great amount of legislation
deals with the natural and artificial shaping of the shoreline of the Lake, and as a result a great number of studies and plans were created. According to the A., urgent actions need to be taken to stop illegal use of the shore (in filling, construction
A revised chronology for the last Pleistocene lake cycle in the central Lahontan basin
Amérique du Nord ; Datation radiocarbone ; Domaine aride ; Etats-Unis ; Great Basin ; Géographie de l'Amérique ; Lac ; Lake Lahontan ; Niveau lacustre ; Paléohydrologie ; Pléistocène supérieur ; Quaternaire zones moyennes
Radiocarbon dates of plant materials from packrat middens, in conjunction with radiocarbon dates of archaeological materials, provide evidence that the last high stand of Pleistocene Lake Lahontan terminated before 12,070 yr B. P. This new
information suggests that the last major fluctuation in the level of Lake Lahontan was approximately synchronous with those of Lakes Bonneville and Russel, and that these three lakes probably responded contemporaneously to the same regional paleoclimatic
Upper Quaternary sediments and soils in the Great Salt Lake-area, USA
Etats-Unis ; Formation superficielle ; Great Salt Lake area ; Géographie physique ; Loess ; Propriété du sol ; Pédogenèse ; Périglaciaire ; Quaternaire ; Sol ; Solifluxion ; Utah ; Versant
Paleomagnetic investigation of lake Lahontan sediments and its application for dating pluvial events in the Northwestern Great Basin
A comparison of paleomagnetic secular variation in sediment of Pleistocene Lake lahontan in the northwestern Great basin with secular variation in lake sediment in the Mono Basin, California, indicates that Lake Lahontan was in the valley
of the Truckee River between Pyramid Lake and Wadsworth, Nevada, from about 19,000 to 13,000 yr B.P. On the basis of field mapping and tephrochronology, the sections of older lacustrine sediments are not coeval. The apparent, but erroneous, correlation of those
Environment, culture, and the GreatLakes fisheries
Canada ; Droits de pêche ; Ecosystème ; Environnement ; Espèce invasive ; Etats-Unis ; GreatLakes ; Industrie ; Industrie de la pêche ; Poisson ; Pollution de l'eau ; Qualité de l'eau ; Siècle 19 ; Siècle 21
Canada ; Ecosystem ; Environment ; Fish ; Fishing industry ; GreatLakes ; Industry ; Invasive species ; Nineteenth Century ; Twenty-first century ; United States of America ; Water pollution ; Water quality
The commercial fisheries of the United States and Canadian GreatLakes are in a long period of decline. Detailed statistics kept for well over a century document a fluctuating pattern of harvests of the major commercial species. In the 1940s, sea
commercial fishing operation in the region. Despite the many environmental and cultural challenges, the GreatLakes fisheries live on.
during the past thirty years have awarded a sizable share of commercial fishing rights to Native North Americans for their own support and sustenance. The Lake Erie yellow perch and walleye fishery, based mainly in Ontario, is the most successful
Evidence for the intra-Glenwood (Mackinaw) low-water phase of glacial Lake Chicago
Canada ; Glaciaire ; Glaciolacustre ; GreatLakes ; Géographie de l'Amérique ; Lac ; Niveau lacustre ; Paléo-environnement ; Quaternaire
The 14C age control on the stratigraphy at the Riverside site in Michigan confirms that an intra-Glenwood low-water phase occurred in the Lake Michigan basin during the Mackinaw Interstade. The existence of low-level lakes at this time also
indicates that the ice margin of the Lake Michigan lobe must have retreated at least as far north as the Straits of Mackinac region during the Mackinaw Interstade.