Please use this identifier to cite or link to this item: https://hdl.handle.net/11681/5907
Title: The chemistry of 700 years of precipitation at DYE 3, Greenland
Authors: Greenland Ice Sheet Program.
National Science Foundation (U.S.)
Cragin, James H.
Herron, M.
Langway, Chester C., 1929-
Keywords: Aerosols
Ice cores
Snow
Snow composition
Greenland
Air pollution
Atmospheric transport
Chemical analysis
Deposition
Ice core
Ice sheets
Information
Pollutant lead aerosols
Pollutant sulfur aerosols
Sea salt
Terrestrial dust
Issue Date: Jul-1975
Publisher: Cold Regions Research and Engineering Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Research report (Cold Regions Research and Engineering Laboratory (U.S.)) ; 341.
Description: Research Report
Abstract: Concentrations of sodium, potassium, magnesium, calcium, silicon, aluminum, lead and sulfate were measured in surface snow and in individual annual accumulation layers from a 373-m-deep ice core from Dye 3, Greenland, covering the time period from 1232 to 1971 A.D. Average background (pre-1840) concentrations in micrograms/liter are: Na, 12.9 ± 9.3; K, 2.2 ± 2.1; Mg, 1.5 ± 1.0; Ca, 4.8 ± 2.4; Si, 12 ± 6; Al, 3.3 ± 1.4; Pb, 0.07 ± 0.06; and SO4, 56 ± 22. Deviations are due mainly to the variability of the concentrations in the samples deposited over the stated time interval rather than analytical precision. Observed concentrations of sodium, potassium, magnesium, calcium, silicon and aluminum can be adequately explained by relative abundances of these elements in seawater andterrestrial dust. Late 19th century annual ice layers contain twice as much sulfate as pre-1840 deposits, reflecting the increased use of fossil fuels in the Northern Hemisphere. Lead concentrations in post-1955 snow deposits are more than an order of magnitude greater than pre-1840 baseline concentrations and are attributed to smelting and the increased use of lead alkyls in gasoline.
URI: http://hdl.handle.net/11681/5907
Appears in Collections:CRREL Research Report

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