Density, δ¹⁸O and accumulation rates from snow pits on the Filchner-Ronne Ice Shelf, supplement to: Graf, Wolfgang; Moser, Heribert; Oerter, Hans; Reinwarth, Oskar; Stichler, Willibald (1988): Accumulation and ice core-studies on Filchner-Ronne Ice Shelf, Antarctica. Annals of Glaciology, 11, 23-31

• Main Authors: Graf, Wolfgang, Moser, Heribert, Oerter, Hans, Reinwarth, Oskar, Stichler, Willibald
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 1988
• Subjects: Snow pit; Ice drill; FRISP 1992; Sampling/drilling ice; Glaciology @ AWI AWI_Glac; Möllereisstrom; Moser; Ronne Ice Shelf; Antarc*; Antarctica; Filchner Ronne Ice Shelf; Filchner-Ronne Ice Shelf; ice core; Ice Shelf
• Online Access: https://dx.doi.org/10.1594/pangaea.728121; https://doi.pangaea.de/10.1594/PANGAEA.728121

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.