Nitrate δ15N values and ice density-based surface mass balance from the ABN1314-103 ice core, Aurora Basin North, Antarctica

DOI

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.

Identifier
DOI https://doi.org/10.1594/PANGAEA.941491
Related Identifier References https://doi.org/10.1594/PANGAEA.948355
Related Identifier References https://doi.org/10.1594/PANGAEA.941480
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.941491
Provenance
Creator Akers, Pete D ORCID logo; Savarino, Joël ORCID logo; Caillon, Nicolas ORCID logo; Servettaz, Aymeric P M ORCID logo; Le Meur, Emmanuel ORCID logo; Magand, Olivier ORCID logo; Agosta, Cécile ORCID logo; Crockford, Peter; Kobayashi, Kanon; Hattori, Shohei ORCID logo; Curran, Mark; van Ommen, Tas D ORCID logo; Jong, Lenneke (ORCID: 0000-0001-6707-570X); Roberts, Jason L ORCID logo; Martins, Jean ORCID logo
Publisher PANGAEA
Publication Year 2022
Funding Reference European Commission https://doi.org/10.13039/501100000780 Crossref Funder ID 889508 European Horizon Marie Skłodowska-Curie individual fellowship 889508; Japan Society for the Promotion of Science https://doi.org/10.13039/501100001691 Crossref Funder ID MEXT/JSPS KAKENHI 20H04969
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Representation
Resource Type Bundled Publication of Datasets; Collection
Format application/zip
Size 2 datasets
Discipline Earth System Research
Spatial Coverage (111.370 LON, -71.170 LAT)