Fe concentration and fluxes from the NEEM ice core (Greenland)

• Main Authors: Burgay, Francois, Spolaor, Andrea, Gabrieli, Jacopo, Cozzi, Giulio, Turetta, Clara, Vallelonga, Paul T, Barbante, Carlo
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2021
• Subjects: Greenland; high-resolution; ice core; iron; NEEM; Age; Depth, top/min; Depth, bottom/max; DEPTH, ice/snow; Iron; Iron, flux per year; Sodium; Sodium, flux per year; Calcium; Calcium, flux per year; Ice drill; Calculated; North Greenland Eemian Ice Drilling NEEM; Rasmussen; North Greenland
• Online Access: https://dx.doi.org/10.1594/pangaea.930580; https://doi.pangaea.de/10.1594/PANGAEA.930580

In this dataset, we present Fe, Na and Ca concentration and fluxes retrieved from the North Greenland Eemian Ice Drilling (NEEM) ice core project, covering the last 108 kyrs. The sampling resolution was 110 cm. To ensure an effective dissolution of Fe particles, samples were acidified to pH 1 using Suprapure nitric acid and stored at room temperature for 1 month before the analysis. The ice samples were analyzed with an Inductively Coupled Plasma Single Quadrupole Mass Spectrometer equipped with a quartz Scott spray chamber. Limits of Detection, calculated as three times the standard deviation of the blanks, were 0.8 µg L-1 for 57Fe, 1 µg L-1 for Ca and 3 µg L-1 for Na. Our results show that Holocene Fe fluxes (0.042 -11.7 kyr b2k, 0.5 mg m-2 yr-1) at the NEEM site were four times lower than the average recorded over the last glacial period (11.7– 108 kyr b2k, 2.0 mg m-2 yr-1), while they were greater during the Last Glacial Maximum (LGM, 14.5 – 26.5 kyr b2k, 3.6 mg m-2 yr-1) and Marine Isotope Stage 4 (MIS 4, 60 - 71 kyr b2k, 5.8 mg m-2 yr-1). : We present Fe, Ca and Na concentration and fluxes. Dating (GICC05modelext-NEEM-1) and accumulation data are from Rasmussen et al., 2013.