Physical and chemical analysis of firn cores from Ronne Ice Shelf, Antarctica

DOI

This data on the distribution of the accumulation rate and 18O content of near-surface layers in the eastern part of the Ronne Ice Shelf, Antarctica, were derived from an analysis of 16 firn cores. The firn cores were drilled along the traverse route of the Filchner-V-Campaign in 1995. The traverse followed an ice flowline of the Foundation Ice Stream and reached the margin of the inland ice, an area which has not yet been investigated. On the ice shelf the accumulation rates decrease with distance from the coast. Ascending to the inland ice the accumulation rates again reach almost coastal values. This regional distribution is in agreement with the temperature gradient along the traverse. The 18O content of the near-surface layers is closely related to the 10 m firn temperature. They strongly decrease from the grounding line towards the inland ice. At the southernmost site at 1100 m a.s.l., the mean d18O value of the firn decreases to -40‰. Ice with that isotopic signature was found in cores from the central part of the Ronne Ice Shelf just above the marine ice layer, indicating that it originates from this area. All ice deposited as snow further south was melted beneath the ice shelf after passing the grounding-line area. The time series of accumulation rate and 18O content reveal no climatic trend during the last 30-50 years.

Supplement to: Graf, Wolfgang; Reinwarth, Oskar; Oerter, Hans; Mayer, Christoph; Lambrecht, Astrid (1999): Surface accumulation on Foundation Ice Stream, Antarctica. Annals of Glaciology, 29, 23-28

Identifier
DOI https://doi.org/10.1594/PANGAEA.548620
Related Identifier https://doi.org/10.3189/172756499781820987
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.548620
Provenance
Creator Graf, Wolfgang; Reinwarth, Oskar; Oerter, Hans; Mayer, Christoph ORCID logo; Lambrecht, Astrid
Publisher PANGAEA
Publication Year 1999
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Representation
Language English
Resource Type Supplementary Publication Series of Datasets; Collection
Format application/zip
Size 32 datasets
Discipline Geosciences; Geospheric Sciences; Glaciology; Natural Sciences
Spatial Coverage (-60.360W, -84.818S, -51.533E, -77.992N); Filchner Ronne Ice Shelf; Foundation Ice Stream
Temporal Coverage Begin 1995-02-03T00:00:00Z
Temporal Coverage End 1995-02-22T00:00:00Z