High-resolution aerosol data from the top 3.8 kyr of the East Greenland Ice coring Project (EGRIP) ice core

Erhardt, Tobias; Jensen, Camilla Marie; Adolphi, Florian; Kjær, Helle Astrid; Dallmayr, Remi; Twarloh, Birthe; Behrens, Melanie; Hirabayashi, Motohiro; Fukuda, Kaori; Ogata, Jun; Burgay, François; Scoto, Federico; Crotti, Ilaria; Spagnesi, Azzurra; Maffezzoli, Niccoló; Segato, Delia; Paleari, Chiara; Mekhaldi, Florian; Muscheler, Raimund; Darfeuil, Sophie; ... (2023). High-resolution aerosol data from the top 3.8 kyr of the East Greenland Ice coring Project (EGRIP) ice core. Earth System Science Data, 15(11), pp. 5079-5091. Copernicus Publications 10.5194/essd-15-5079-2023

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Here we present the high-resolution continuous flow analysis (CFA) data from the top 479m of
the East Greenland Ice coring Project (EGRIP) ice core covering the past 3.8 kyr. The data consist of 1mm
depth-resolution profiles of calcium, sodium, ammonium, nitrate, and electrolytic conductivity as well as decadal
averages of these profiles. The nominally 1mm data represent an oversampling of the record as the true resolution
is limited by the analytical setup to approximately 1 cm. Alongside the data we provide a description of the
measurement setup, procedures, the relevant references for the specific methods as well as an assessment of the
precision of the measurements, the sample-to-depth assignment, and the depth and temporal resolution of the data
set. The error in absolute depth assignment of the data may be on the order of 2 cm; however, relative depth offsets
between the records of the individual species are only on the order of 1 mm. The presented data have sub-annual
resolution over the entire depth range and have already formed part of the data for an annually layer-counted
timescale for the EGRIP ice core used to improve and revise the multi-core Greenland ice-core chronology
(GICC05) to a new version, GICC21 (Sinnl et al., 2022). The data are available in full 1mm resolution and
decadal averages on PANGAEA (https://doi.org/10.1594/PANGAEA.945293, Erhardt et al., 2022b).

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