High-resolution aerosol concentration data from the Greenland NorthGRIP and NEEM deep ice cores
Erhardt, T.; Bigler, M.; Federer, U.; Gfeller, G.; Leuenberger, D.; Stowasser, O.; Röthlisberger, R.; Schüpbach, S.; Ruth, U.; Twarloh, B.; Wegner, A.; Goto-Azuma, K.; Kuramoto, T.; Kjær, H.A.; Vallelonga, P.T.; Siggaard-Andersen, M-L.; Hansson, M.E.; Benton, A.K.; Fleet, L.G.; Mulvaney, R. ORCID: https://orcid.org/0000-0002-5372-8148; Thomas, E.R. ORCID: https://orcid.org/0000-0002-3010-6493; Abram, N.; Stocker, T.F.; Fischer, H.. 2022 High-resolution aerosol concentration data from the Greenland NorthGRIP and NEEM deep ice cores. Earth System Science Data, 14 (3). 1215-1231. https://doi.org/10.5194/essd-14-1215-2022
Before downloading, please read NORA policies.
|
Text (Open Access)
© Author(s) 2022. essd-14-1215-2022.pdf - Published Version Available under License Creative Commons Attribution 4.0. Download (3MB) | Preview |
Abstract/Summary
Records of chemical impurities from ice cores enable us to reconstruct the past deposition of aerosols onto polar ice sheets and alpine glaciers. Through this they allow us to gain insight into changes of the source, transport and deposition processes that ultimately determine the deposition flux at the coring location. However, the low concentrations of the aerosol species in the ice and the resulting high risk of contamination pose a formidable analytical challenge, especially if long, continuous and highly resolved records are needed. Continuous flow analysis, CFA, the continuous melting, decontamination and analysis of ice-core samples has mostly overcome this issue and has quickly become the de facto standard to obtain high-resolution aerosol records from ice cores after its inception at the University of Bern in the mid-1990s. Here, we present continuous records of calcium (Ca2+), sodium (Na+), ammonium (NH+4), nitrate (NO-3) and electrolytic conductivity at 1 mm depth resolution from the NGRIP (North Greenland Ice Core Project) and NEEM (North Greenland Eemian Ice Drilling) ice cores produced by the Bern Continuous Flow Analysis group in the years 2000 to 2011 (Erhardt et al., 2021). Both of the records were previously used in a number of studies but were never published in full 1 mm resolution. Alongside the 1 mm datasets we provide decadal averages, a detailed description of the methods, relevant references, an assessment of the quality of the data and its usable resolution. Along the way we will also give some historical context on the development of the Bern CFA system. The data is available in full 1 mm and 10-year-averaged resolution on PANGAEA (https://doi.org/10.1594/PANGAEA.935838, Erhardt et al., 2021)
Item Type: | Publication - Article |
---|---|
Digital Object Identifier (DOI): | https://doi.org/10.5194/essd-14-1215-2022 |
ISSN: | 18663508 |
Date made live: | 10 Dec 2021 11:26 +0 (UTC) |
URI: | https://nora.nerc.ac.uk/id/eprint/531305 |
Actions (login required)
View Item |
Document Downloads
Downloads for past 30 days
Downloads per month over past year