Akers, Pete D; Savarino, Joël; Caillon, Nicolas; Servettaz, Aymeric P M; Le Meur, Emmanuel; Magand, Olivier; Agosta, Cécile; Crockford, Peter; Kobayashi, Kanon; Hattori, Shohei; Curran, Mark; van Ommen, Tas D; Jong, Lenneke; Roberts, Jason L; Martins, Jean (2022): Nitrate δ15N values and ice density-based surface mass balance from the ABN1314-103 ice core, Aurora Basin North, Antarctica [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.941491
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Abstract:
Nitrate concentration and isotopic (δ15NNO3) data, ice density, and surface mass balance estimates from the ABN1314-103 ice core. This 103 m long core was drilled beginning on 07 January 2014 as one of three ice cores at Aurora Basin North, Antarctica (-71.17, 111.37, 2679 m.a.s.l), in the 2013-2014 field season. The age-depth model for ABN1314-103 was matched through ion profiles from an annually-resolved model (ALC01112018) originally developed for one of the other ABN cores through seasonal ion and water isotope cycles and constrained by volcanic horizons. Each 1 m segment of the core was weighed and measured for ice density calculations, and then sampled for nitrate at 0.33 m resolution. Nitrate concentrations were taken on melted ice aliquots with ion chromatography, while isotopic analysis was achieved through bacterial denitrification and MAT 253 mass spectrometry after concentrating with anionic resin. Using the density data and the age-depth model's dates for the top and bottom of each 1 m core segment, we reconstructed a history of surface mass balance changes as recorded in ABN1314-103. Additionally, we also estimated the effect of upstream topographic changes on the ice core's surface mass balance record through a ground penetrating radar transect that extended 11.5 km against the direction of glacial ice flow. The modern SMB changes along this upstream transect were linked to ABN1314-103 core depths by through the local horizontal ice flow rate (16.2 m a-1) and the core's age-depth model, and included here for comparative analysis. See Akers et al., 2022 for more analytical details.
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Related to:
Akers, Pete D; Savarino, Joël; Caillon, Nicolas; Magand, Olivier; Le Meur, Emmanuel (2022): Nitrate isotopic data from snow collected along the CHICTABA traverse, East Antarctica, 2013-2014. PANGAEA, https://doi.org/10.1594/PANGAEA.948355
Akers, Pete D; Savarino, Joël; Caillon, Nicolas; Servettaz, Aymeric P M; Le Meur, Emmanuel; Magand, Olivier; Agosta, Cécile; Crockford, Peter; Kobayashi, Kanon; Hattori, Shohei; Curran, Mark; van Ommen, Tas D; Jong, Lenneke; Roberts, Jason L; Martins, Jean (2022): Spatial variability in sub-photic zone nitrate δ15N and surface mass balance across East Antarctica. PANGAEA, https://doi.org/10.1594/PANGAEA.941480
Servettaz, Aymeric P M (2021): Two thousand years of temperature variability on the lower East Antarctic Plateau inferred from the analysis of stable isotopes of water and inert gases in the Aurora Basin North ice core. Université Paris-Saclay - Climatology
Funding:
European Commission (EC), grant/award no. 889508: European Horizon Marie Skłodowska-Curie individual fellowship 889508
Coverage:
Latitude: -71.170000 * Longitude: 111.370000
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
2 datasets
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Datasets listed in this bundled publication
- Akers, PD; Savarino, J; Caillon, N et al. (2022): Nitrate concentration, isotopic δ15N and surface mass balance from the ABN1314-103 ice core, Aurora Basin North, Antarctica. https://doi.org/10.1594/PANGAEA.941490
- Akers, PD; Savarino, J; Caillon, N et al. (2022): Ice density-based surface mass balance from the ABN1314-103 ice core, Aurora Basin North, Antarctica. https://doi.org/10.1594/PANGAEA.941489