Age models of five ice cores from the Dronning Maud Land, Antarctica

DOI

For the first time, annually resolved accumulation rates have been determined in central Antarctica by means of counting seasonal signals of ammonium, calcium, and sodium. All records, obtained from three intermediate depth ice cores from Dronning Maud Land, East Antarctica, show rather constant accumulation rates throughout the last 9 centuries with mean values of 63, 61, and 44 mm H2O yr**-1 and a typical year-to-year variation of about 30%. For the last few decades, no trend was detected accounting for the high natural variability of all records. A significant weak intersite correlation is apparent only between two cores when the high-frequency part with periods less than 30 years is removed. By analyzing the records in the frequency domain, no persistent periods were found. This suggests that the snow accumulation in this area is mainly influenced by local deposition patterns and may be additionally masked by redistribution of snow due to wind. By comparing accumulation rates over the last 2 millennia a distinct change in the layer thickness in one of the three cores was found, which might be attributed either to an area upstream of the drilling site with lower accumulation rates, or to deposition processes influenced by surface undulations. The missing of a clear correlation between the accumulation rate histories at the three locations is also important for the interpretation of small, short time variations of past precipitation records obtained from deep ice cores.

see doi:10.1594/PANGAEA.728291 for chemical records

Supplement to: Sommer, Stefan; Appenzeller, C; Röthlisberger, Regine; Hutterli, Manuel A; Stauffer, Bernhard; Wagenbach, Dietmar; Oerter, Hans; Wilhelms, Frank; Miller, Heinz; Mulvaney, Robert (2000): Glacio-chemical study spanning the past 2 kyr on three ice cores from Dronning Maud Land, Antarctica 1. Annually resolved accumulation rates. Journal of Geophysical Research: Atmospheres, 105(D24), 29411-29422

Identifier
DOI https://doi.org/10.1594/PANGAEA.728290
Related Identifier https://doi.org/10.1029/2000JD900449
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.728290
Provenance
Creator Sommer, Stefan; Appenzeller, C ORCID logo; Röthlisberger, Regine; Hutterli, Manuel A; Stauffer, Bernhard; Wagenbach, Dietmar; Oerter, Hans; Wilhelms, Frank ORCID logo; Miller, Heinz; Mulvaney, Robert ORCID logo
Publisher PANGAEA
Publication Year 2000
Funding Reference Fifth Framework Programme https://doi.org/10.13039/100011104 Crossref Funder ID EVK2-CT-2000-00077 https://cordis.europa.eu/project/id/EVK2-CT-2000-00077 European Project for Ice Coring in Antarctica; Fourth Framework Programme https://doi.org/10.13039/100011105 Crossref Funder ID ENV4980702 https://cordis.europa.eu/project/id/ENV4980702 European Project for Ice Coring in Antarctica
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 7 datasets
Discipline Earth System Research
Spatial Coverage (-3.430W, -75.582S, 6.498E, -74.499N); Dronning Maud Land, Antarctica
Temporal Coverage Begin 1997-12-19T00:00:00Z
Temporal Coverage End 1998-01-14T00:00:00Z