Microparticles in a deep ice core drilled at NEEM, Greenland: cryogenic scanning electron microscopic observations of location, size, shape, and constituent elements ...

• Main Authors: Shigeyama, Wataru, Nakazawa, Fumio, Goto-Azuma, Kumiko, Homma, Tomoyuki, Nagatsuka, Naoko, Mateiu, Ramona, Takata, Morimasa, Azuma, Nobuhiko, Dahl-Jensen, Dorthe
• Format: Dataset
• Language: English
• Published: Arctic Data archive System (ADS), Japan 2021
• Subjects: CRYOSPHERE>GLACIERS/ICE SHEETS>DEPTHS AT SPECIFIC AGES; PALEOCLIMATE>ICE CORE RECORDS>PARTICULATE MATTER; CRYOSPHERE>GLACIERS/ICE SHEETS>ICE SHEETS; Greenland; ice core; North Greenland
• Online Access: https://dx.doi.org/10.17592/001.2021031801; https://ads.nipr.ac.jp/dataset/A20210318-001

This report presents the analysis of microparticles contained in the deep ice core drilled at the North Greenland Eemian Ice Drilling (NEEM) site, using a cryogenic scanning electron microscope (SEM) equipped with an energy dispersive X-ray spectrometer (EDS). By implementing additional optical microscopic analysis prior to cryogenic SEM/EDS analysis, it was possible to exclude microparticles formed during the cryogenic SEM/EDS experiments. The examined ice core samples were cut from depths corresponding to five different climate stages, from the Holocene period through the last interglacial epoch. Overall, 514 microparticles were observed via SEM, and 151 of those were also analyzed based on their EDS spectra to determine their chemical compositions. A catalog containing the details of all the observed microparticles was then constructed. The catalog presents optical and secondary electron images of microparticles, an area-equivalent diameter and aspect ratio of each microparticle, and its distance from the ...