Lower Triassic bryozoan beds from Ellesmere Island, High Arctic, Canada
نویسندگان
چکیده
منابع مشابه
Five thousand years of sediment transfer in a high arctic watershed recorded in annually laminated sediments from Lower Murray Lake, Ellesmere Island, Nunavut, Canada
Sediments in Lower Murray Lake, northern Ellesmere Island, Nunavut Canada (81 210 N, 69 320 W) contain annual laminations (varves) that provide a record of sediment accumulation through the past 5000? years. Annual mass accumulation was estimated based on measurements of varve thickness and sediment bulk density. Comparison of Lower Murray Lake mass accumulation with instrumental climate data, ...
متن کاملThe climatic signal in varved sediments from Lake C2, northern Ellesmere Island, Canada
Annually-laminated clastic sediments preserve a high resolution proxy record of paleoclimate, provided that allochthonous sedimentation represents a response to meteorological forcing of watershed sediment transfer. Here, we demonstrate this linkage, and illustrate a calibration process using the most recent 40 years of a varve record from Lake C2 (82~ t N; 78000 ' W), three years of field meas...
متن کاملRapid Lacustrine Response to Recent High Arctic Warming: A Diatom Record from Sawtooth Lake, Ellesmere Island, Nunavut
Diatoms from Sawtooth Lake (798209N, 818519W) on the Fosheim Peninsula in Central Ellesmere Island, Canada were analyzed to assess the temporal extent and magnitude of climatic change in the High Arctic during the late Holocene. Diatom results from the sediment cores show an absence of diatoms throughout the last ;2.5 ka (4.6 m) until the 1920s. However, ca. 1926 (5.3-cm depth), a rapid coloniz...
متن کاملA 300 year record of environmental change from Lake Tuborg, Ellesmere Island, Nunavut, Canada
Lamination thickness measurements in sediments from Lake Tuborg, northern Ellesmere Island, Canada document an increase in high-energy hydrologic discharge events from 1865 to 1962. The timing of these events corresponds with evidence for an increase in the amount of melt on the adjacent Agassiz Ice Cap, as recorded in ice cores. There appears to have been a non-linear change in depositional en...
متن کاملClimatic influences on streamflow and sediment flux into Lake C2, northern Ellesmere Island, Canada
Streamflow, suspended sediment transport and meteorological variables at two elevations were measured through the 1990-1992 field seasons at Lake C2, northern Ellesmere Island, as part of the Taconite Inlet Lakes Project. The objectives were to determine the extent to which suspended sediment flux responded to climatic variability, and to ascertain which meteorological variable was most strongl...
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ژورنال
عنوان ژورنال: Polar Research
سال: 2008
ISSN: 0800-0395,1751-8369
DOI: 10.3402/polar.v27i3.6186