Calibrated cryo cell UV LA ICPMS elemental concentrations from NGRIP ice core reveal abrupt, sub annual variability in dust across the interstadial period GI 21.2
2) There are some novelties in this paper on the way the authors prepared the standards to convert the count per seconds (intensities) into concentrations. However they use standard riverine waters (SLRS) and a suspension of NIST648 leached with ultrapure HNO3, which resulted in an ice matrix standard which is far from the real ice matrix. We know that the slopes of the calibration curves are highly dependent from the matrix itself and I think therefore that the results may be strongly biased by the different ionization of the ice matrix compared to the standard ones.