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Full-Text Articles in Physical Sciences and Mathematics
A Northern Hemisphere Volcanic Chemistry Record (1869-1984) And Climatic Implications Using A South Greenland Ice Core, W. B. Lyons, Paul Andrew Mayewski, M. J. Spencer, M. S. Twickler, T. E. Graedel
A Northern Hemisphere Volcanic Chemistry Record (1869-1984) And Climatic Implications Using A South Greenland Ice Core, W. B. Lyons, Paul Andrew Mayewski, M. J. Spencer, M. S. Twickler, T. E. Graedel
Earth Science Faculty Scholarship
The effect of volcanic emISSIOn of acidic aerosols on climate is well documented. The presence of acid droplets in the stratosphere can reduce transmissivity and hence decrease surface temperatures. Since the amount and chemical composition of erupted material has important effects on regional climate, knowledge of past volcanic events is of extreme importance. Detailed glaciochemical records provide the only milieu wherein the geochemistry of paleovolcanic events can be fully documented. We present a detailed sulfate and chloride record from an ice core drilled at site 20 D, 40 km SW of Dye 3 in southern Greenland. The record spans the …
Detailed Glaciochemical Investigations In Southern Victoria Land, Antarctica — A Proxy Climate Record, Paul Andrew Mayewski
Detailed Glaciochemical Investigations In Southern Victoria Land, Antarctica — A Proxy Climate Record, Paul Andrew Mayewski
Earth Science Faculty Scholarship
The production of environmental change records using time-series data retrieved from ice cores has seen minimal application in the Transantarctic Mountains despite the existence of a well-developed lower resolution glacial geologic record for this area which forms the primary basis for understanding the glacial history of East Antarctica. In addition, records derived from marine and lake cores, glacier margin fluctuation studies, measures of volcanic activity, and meteorological data sets from within or close to the Transantarctic Mountains are available for comparison. This emerging environmental data-base provides the tools needed to define the change characteristics, over a period of thousands of …
A Glaciochemical Survey Of The Summit Region, Greenland, Paul Andrew Mayewski, M. J. Spencer, M. S. Twickler, S. Whitlow
A Glaciochemical Survey Of The Summit Region, Greenland, Paul Andrew Mayewski, M. J. Spencer, M. S. Twickler, S. Whitlow
Earth Science Faculty Scholarship
Spatial representativeness and an understanding of controls on chemical species distribution are essential requirements of any significant ice core investigation. Snowpit studies provide an essential tool in this process. In preparation for the central Greenland deep drilling effort a series of snowpits was sampled in detail for oxygen isotopes, major anions, major cations, total acidity and radionuclides. The results of this sampling program are used to define: (I) the chemical composition of the snow in the region, (2) the input timing and spatial distribution of major chemical species, (3) the potential dependence of species concentration on accumulation rate, and (4) …