Density, δ¹⁸O and accumulation rates from snow pits on the Filchner-Ronne Ice Shelf

Accumulation rates in the eastern part of Ronne Ice Shelf were determined by isotopic stratigraphy (18O). The samples were taken from snow-pits dug during the Filchner I and II operations in 1984 and 1986. In general, the accumulation rate decreases towards the south; the greatest decrease, from 21....

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Bibliographic Details
Main Authors: Graf, Wolfgang, Moser, Heribert, Oerter, Hans, Reinwarth, Oskar, Stichler, Willibald
Format: Dataset
Language:English
Published: PANGAEA 1988
Subjects:
AWI_Glac
B08/T340 D340
Filchner Ronne Ice Shelf
Filchner-Ronne-Ice-Shelf-Project
FRI01S84_141
FRI03S86_345
FRI04S84_140
FRI05S84_240
FRI05S86_240
FRI0686S_241
FRI06S84_241
FRI07C84_340
FRI07S84_340
FRI07S86_340
FRI08S84_341
FRI08S86_341
FRI13S86_335
FRI15S86_131
FRI16S86_230
FRI17S86_231
FRI18S86_330
FRISP 1992
Glaciology @ AWI
ICEDRILL
Ice drill
Sampling/drilling ice
SNOWPIT
Snow pit
SS131_86 D131
SS140_84 D140
SS141_84 D141
SS230_86 D230
SS231_86 D231
SS240_84 D240
SS240_86 D240
SS241_84 D241
SS241_86 D241
SS330_86 D330
SS335_86 D335
SS340_84 D340
SS340_86 D340
SS341_84 D341
SS341_86 D341
SS345_86 D345
Möllereisstrom
Ronne Ice Shelf
Annals of Glaciology
Filchner-Ronne Ice Shelf
ice core
Ice Shelf
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.728121
https://doi.org/10.1594/PANGAEA.728121
Description
Summary:Accumulation rates in the eastern part of Ronne Ice Shelf were determined by isotopic stratigraphy (18O). The samples were taken from snow-pits dug during the Filchner I and II operations in 1984 and 1986. In general, the accumulation rate decreases towards the south; the greatest decrease, from 21.3 to 13.3 g/cm**2/a, was observed between Filchner Station and measuring point 341, sited 270 km up-stream of the ice edge. The d18O values of the near-surface layers vary between -25 and -29 per mil. The 18O content in the more southerly part is progressively depleted in the direction of Möllereisstrom, paralleling a decrease in the accumulation rate. Near the ice edge the 18O content decreases to the west. A 100 m ice core drilled in 1984 at point 340, 22 km from the ice edge, probably goes back to A.D. 1460; it has been dated by isotopic stratigraphy. The accumulation rate up-stream of the drilling site was deduced from the sequence of annual layers, using a simple ice-flow model. The accumulation shows strong variations over the last 200 years, which may be caused in part by local variations in the accumulation on Ronne Ice shelf.

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