High-resolution density profiles of two firn cores from Union Glacier, Ellsworth Mountains, West Antarctica


Firn cores BAL-1 and PASO-1 were both retrieved in November 2015 from the Union Glacier region, located in the Ellsworth Mountains at the northern edge of the West Antarctic Ice Sheet. BAL-1 was drilled in a U-shaped glacial valley (Balish Glacier) at an altitude of approximately 1520 m above sea level (a.s.l.) to a depth of 17.28 m. PASO-1 was drilled on a plateau west of the Gifford Peaks at an altitude of about 1920 m a.s.l. to a depth of 15.04 m. Both firn cores were obtained using a portable solar-powered and electrically operated ice-core drill (Backpack Drill; icedrill.ch AG). Density measurements of the two firn cores were performed at the ice-core processing facilities of the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI) in Bremerhaven, Germany, in spring and autumn 2016. X-ray microfocus computer tomography (ICE-CT; Freitag et al., 2013, doi:10.3189/2013JoG13J028) was used for the measurements, providing depth-density profiles with a resolution of better than 1 mm. The density data were used to analyse the firn core stratigraphy (e.g., determination of the snow-firn transition depth, identification of wind crusts), to calculate diffusion lengths as well as to derive accumulation rates for the firn-core drill sites.

DOI https://doi.org/10.1594/PANGAEA.963192
Related Identifier https://doi.org/10.5194/tc-14-881-2020
Related Identifier https://doi.org/10.3189/2013JoG13J028
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.963192
Creator Hoffmann-Abdi, Kirstin ORCID logo; Fernandoy, Francisco ORCID logo; Meyer, Hanno ORCID logo; Thomas, Elizabeth R ORCID logo; Aliaga, Marcelo; Tetzner, Dieter ORCID logo; Freitag, Johannes ORCID logo; Opel, Thomas ORCID logo; Arigony-Neto, Jorge ORCID logo; Göbel, Christian Florian ORCID logo; Jaña, Ricardo ORCID logo; Rodríguez Oroz, Delia (ORCID: 0000-0002-9859-485X); Tuckwell, Rebecca; Lynch, Emily; McConnell, Joseph R ORCID logo; Schneider, Christoph ORCID logo
Publisher PANGAEA
Publication Year 2024
Funding Reference Agencia Nacional de Investigación y Desarrollo https://doi.org/10.13039/501100002848 Crossref Funder ID 11121551 Recent high-resolution climate reconstruction at the Northern Antarctic Peninsula - Glacio-geochemical investigations at Plateau Laclavere Ice Cap
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Resource Type Publication Series of Datasets; Collection
Format application/zip
Size 2 datasets
Discipline Earth System Research
Spatial Coverage (-85.006W, -79.634S, -84.442E, -79.524N)