Hoffmann-Abdi, Kirstin; Fernandoy, Francisco; Meyer, Hanno; Thomas, Elizabeth R; Aliaga, Marcelo; Tetzner, Dieter; Freitag, Johannes; Opel, Thomas; Arigony-Neto, Jorge; Göbel, Christian Florian; Jaña, Ricardo; Rodríguez Oroz, Delia; Tuckwell, Rebecca; Lynch, Emily; McConnell, Joseph R; Schneider, Christoph (2024): High-resolution density profiles of two firn cores from Union Glacier, Ellsworth Mountains, West Antarctica [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.963192
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Abstract:
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.
Related to:
Hoffmann, Kirstin; Fernandoy, Francisco; Meyer, Hanno; Thomas, Elizabeth R; Aliaga, Marcelo; Tetzner, Dieter; Freitag, Johannes; Opel, Thomas; Arigony-Neto, Jorge; Göbel, Christian Florian; Jaña, Ricardo; Rodríguez Oroz, Delia; Tuckwell, Rebecca; Ludlow, Emily; McConnell, Joseph R; Schneider, Christoph (2020): Stable water isotopes and accumulation rates in the Union Glacier region, Ellsworth Mountains, West Antarctica, over the last 35 years. The Cryosphere, 14(3), 881-904, https://doi.org/10.5194/tc-14-881-2020
References:
Freitag, Johannes; Kipfstuhl, Sepp; Laepple, Thomas (2013): Core-scale radioscopic imaging: a new method reveals density-calcium link in Antarctic firn. Journal of Glaciology, 59(218), 1009-1014, https://doi.org/10.3189/2013JoG13J028
Funding:
Agencia Nacional de Investigación y Desarrollo (ANID), grant/award no. 11121551: Recent high-resolution climate reconstruction at the Northern Antarctic Peninsula - Glacio-geochemical investigations at Plateau Laclavere Ice Cap
Coverage:
Median Latitude: -79.578940 * Median Longitude: -84.724250 * South-bound Latitude: -79.633520 * West-bound Longitude: -85.006250 * North-bound Latitude: -79.524360 * East-bound Longitude: -84.442250
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
2 datasets
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Datasets listed in this publication series
- Hoffmann-Abdi, K; Fernandoy, F; Meyer, H et al. (2024): High-resolution density data of firn core BAL-1 from Union Glacier, Ellsworth Mountains, West Antarctica. https://doi.org/10.1594/PANGAEA.963191
- Hoffmann-Abdi, K; Fernandoy, F; Meyer, H et al. (2024): High-resolution density data of firn core PASO-1 from Union Glacier, Ellsworth Mountains, West Antarctica. https://doi.org/10.1594/PANGAEA.963193