Data Description

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Citation:
Oerter, Hans; Graf, Wolfgang (2006): Physical and chemical investigations on ice cores from the Filchner-Ronne Ice Shelf. doi:10.1594/PANGAEA.548753,
Supplement to: Graf, Wolfgang; Moser, Heribert; Reinwarth, Oskar; Kipfstuhl, Josef; Oerter, Hans; Minikin, Andreas; Wagenbach, Dietmar (1994): Snow-accumulation rates and isotopic content (2H, 3H) of near-surface firn from the Filchner-Ronne Ice Shelf, Antarctica. Annals of Glaciology, 20, 121-128, hdl:10013/epic.11645.d001
Abstract:
The accumulation and distribution of the 2H content of near-surface layers in the eastern part of the Ronne Ice Shelf were determined from 16 firn cores drilled to about 10 m depth during the Filchner IIIa and IV campaigns in 1990 and 1992, respectively. The cores were dated stratigraphically by seasonal d2H variations in the firn. In addition, 3H and high-resolution chemical profiles were used to assist in dating. Both the accumulation rate and the stable-isotope content decrease with increasing distance from the ice edge: the d2H values range from about -195 per mil at the ice edge to -250 per mil at BAS sites 5 and 6, south of Henry Ice Rise, and the accumulation rates from about 210 to 90 kg/m**2/a. The d2H values of the near-surface firn and the 10 m firn temperatures (Theta) at individual sites are very well correlated: ddelta2H/dTheta=(10.3±0.6)per mil /K; r = 0.97.
The d2H profiles of the two ice cores B13 and B15 drilled in 1990 and 1992 to 215 and 320 m depth, respectively, reflect the gradual depletion in 2H in the firn upstream of the drill sites. Comparison with tlie surface data indicates that the ice above 142 m in core B15 and above 137 m in core B13 was deposited on the ice shelf, whereas the deeper ice, down to 152.8 m depth, most probably originated from the margin of the Antarctic ice sheet.
Project(s):
Glaciology @ AWI (AWI_Glac) *
Coverage:
Median Latitude: -78.074311 * Median Longitude: -54.856193 * South-bound Latitude: -81.617000 * West-bound Longitude: -60.614720 * North-bound Latitude: -76.958890 * East-bound Longitude: -39.434720
Minimum Age: -0.041 ka BP * Maximum Age: 0.014 ka BP
Event(s):
BER01S90_01 (SSBerkN North-dome) * * Latitude: -78.300000 * Longitude: -46.283000 * Date/Time: 1990-01-06T00:00:00 * Elevation: 730.0 m * Recovery: 1.97 m * Location: Berkner Island (Reinwarthhöhe) * * Campaign: FRISP 1992 (Filchner-Ronne-Ice-Shelf-Project) * * Basis: Sampling/drilling ice * * Device: Snow pit * * Comment: sampling during ANT-VIII/5
BER02S90_02 (SSBerkS South-dome) * * Latitude: -79.658000 * Longitude: -45.617000 * Date/Time: 1990-01-06T00:00:00 * Elevation: 940.0 m * Recovery: 1.99 m * Location: Berkner Island (Thyssenhöhe) * * Campaign: FRISP 1992 (Filchner-Ronne-Ice-Shelf-Project) * * Basis: Sampling/drilling ice * * Device: Snow pit * * Comment: sampling during ANT-VIII/5
FRI02C92_246 (F246 D246) * * Latitude: -78.427780 * Longitude: -52.506390 * Date/Time: 1992-01-30T00:00:00 * Elevation: 68.0 m * Recovery: 10.10 m * Location: Filchner Ronne Ice Shelf * * Campaign: FRISP 1992 (Filchner-Ronne-Ice-Shelf-Project) * * Basis: Sampling/drilling ice * * Device: Firn auger * * Comment: sampling during ANT-X/2
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