Comparison of accumulation rates and stable isotope ratios, supplement to: Schlosser, Elisabeth; Oerter, Hans (2002): Shallow firn cones from Neumayer, Ekströmisen, Antartica: a comparison of accumulation rates and stable-isotope ratios. Annals of Glaciology, 35, 91-96

DOI

Since 1979/80, glaciological studies have been carried out at Ekströmisen, Antarctica, including accumulation-stake measurements, snow-pit and shallow-firn-core studies. Snowstratigraphy, chemical properties and stable-isotope ratios (d18O) were investigated. This study focuses on three cores taken between 1982 and 1998. The 1998 core was dated using dielectric profiling, d18O profiles and stake measurements. Accumulation rates showhigh interannual and spatial variability due to the extreme wind influence. No significant trend was found for the last 50 years; during the first half of the 20th century, accumulation decreased. The high spatial and interannual variability, however, means that trends must be interpreted with care. In spite of the highly irregular accumulation distribution, stable-isotope ratios show little spatial variability. The mean annual d18O values of cores B04 and FB0198 agree fairly well for the time period 1955-82 covered by both cores. d18O values have increased during most of the 20th century; since the late 1980s a decrease is observed. This change is not related to air temperature, since mean annual air temperatures at Neumayer show no significant trend over the last two decades.

Identifier
DOI http://dx.doi.org/doi:10.1594/PANGAEA.690398
Metadata Access http://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite3&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.690398
Provenance
Creator Oerter, Hans;Schlosser, Elisabeth
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
Publication Year 2002
Rights Creative Commons Attribution 3.0 Unported (CC-BY)
Representation
Language English
Resource Type Supplementary Collection of Datasets
Format application/zip
Coverage
Discipline Earth System Research
Spatial Coverage (71S-71S,8 W-8 W)
Temporal Point 1982-02-26T11:59:59Z