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Dronning Maud Land, Antarctica (Location--2°00'E, 75°00'S,
Elevation--2,900 m a.s.l.)
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One core drilled austral summer 1991-1992; 20 meters
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DATA SET AVAILABLE:
Core: Chemistry (Na, Mg, Ca, Cl, NO3, SO4, MSA)
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The core was drilled by the Swedish Antarctic Research Program using a PICO
light-weight corer. All field core processing was done by the Swedish field
party. The core was shipped frozen to Sweden and later to the Glacier Research
Group faciltiy at the University of New Hampshire, Durham, New Hampshire.
There the core was processed into 3 centimeter pieces by the Glacier Research
Group using established protocals to prevent contamination. The 3 cm pieces
were kept frozen until major ion analysis.
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Analytical methods: Major ion analysis was by ion chromatography. The anions
were analyzed on a Dionex AS4A column; the cations on a Dionex CS12 column and
MSA on a Dionex AS4 column. All used suppressed chromatography.
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Contact:
Sallie Whitlow, Glacier Research Group, Institute for the Study of Earth,
Oceans and Space, Morse Hall, University of New Hampshire, Durham,
New Hampshire 03824
603-862-4129 siw@unh.edu
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Dr. Paul Mayewski, Glacier Research Group, Institute for the Study of Earth,
Oceans and Space, Morse Hall, University of New Hampshire, Durham,
New Hampshire 03824 603-862-3146
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Publications:
Isaksson, Elisabeth. 1994 Climate records from shallow firn cores, Dronning
Maud Land, Antarctica. Department of Physical Geography, Stockholm University, Doctoral Dissertation.
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Isaksson, E., Karlen, W., Gundestrup, N., Mayewski, P., Whitlow, S., and
Twickler, M., 1996. A century of accumulation and temperature changes in
Dronning Maud Land, Antarctica. Jour. Geophy. Res., 101, 7085-7094.
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Data Fields
-999 indicates no data
-888 indicates sample below the level of detection
Precision is the average of the coefficient of variations calculated for each
pair of duplicate aliquots analyzed.
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Data Set: dronning.dat
Top depth, meters;
Bottom depth, meters;
Sodium (Na), micrograms/liter; precision 2%
Magnesium (Mg), micrograms/L; precision 5%
Calcium (Ca), micrograms/L; precision 8%
Chloride (Cl), micrograms/L; precision 2%
Nitrate (NO3), micrograms/L; precision 2%
Sulfate (SO4), micrograms/L; precision 2%
MSA (methanesulfonate), micrograms/L; precison 10%
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General comments on the core chemistry data:
There is no potassium data as potassium coeluded with another, unidentified
compound. The unidentified species is some gas phase compound picked up
during transportation, perhaps from the core bags or the insulation in the
shipping boxes. The absence of potassium data complicated determining which
samples might be contaminated by handling.
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