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Chemical impurity distribtion (Na, Mg, Sr) in the EPICA Dome C ice core bags 1065 and 3092 and Talos Dome ice core bag 375-B1 obtained from 2D imaging with LA-ICP-MS

Authors: Bohleber, Pascal; Roman, Marco; Šala, Martin; Delmonte, Barbara; Stenni, Barbara; Barbante, Carlo;

Chemical impurity distribtion (Na, Mg, Sr) in the EPICA Dome C ice core bags 1065 and 3092 and Talos Dome ice core bag 375-B1 obtained from 2D imaging with LA-ICP-MS

Abstract

Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) offers micron-resolution 2D chemical imaging, which has been adapted recently to ice core analysis. Measurements were performed in 2020 at the Ca'Foscari University of Venice, in order to investigate the localization of impurities in the ice samples. Here images are presented from applying LA-ICP-MS elemental imaging to a samples of the EPICA Dome C ice core and the Talos Dome ice core from Antarctica. Lateral resolution is 35 microns both along and perpendicular to the scan direction. Considered as analytes are Na, Mg and Sr. Background and drift correction as well as image construction were performed using the software HDIP (Teledyne Photon Machines, Bozeman, MT, USA). Impurity images are acquired as a pattern of lines, without overlap in the direction perpendicular to that of the scan, and without any further spatial interpolation. Each pixel in an ice core chemical image has a size of 35 μm x 35 μm. For each chemical element the datasets comprise a numerical matrix which contains rows and columns according to the physical size of the image: an image of 7 mm x 35 mm in size has 200 rows and 1000 columns. The numerical entries in this matrix refer to the recorded intensity (e.g. in counts). Values lower than the detection limit are set to zero. Due to the careful synchronization, the individual pixels of the different chemical channels can be considered to be almost perfectly spatially aligned. In contrast, the mosaic of visual images obtained from the laser camera is not a-priori aligned with the chemical images. The visual images are generally characterized by air bubbles (dark blobs), grain boundaries (dark lines) and occasional sub-grain boundaries (thin dark lines).

The filenames for the individual chemical channels are in csv format, the respective mosaic visual image is a jpg. The beginning of the filename refers to the core and bag name, the ending refers to the chemical element or the mosaic.

Related Organizations
Keywords

File content, Binary Object, Event label, Earth System Research, Ice core, Antarctica, Drilling/drill rig, Chemical impurities, Drilling drill rig, LA-ICP-MS, LA ICP MS, Ice drill

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  • citations
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    0
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Average
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Average
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Average
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Funded by
EC| Beyond EPICA
Project
Beyond EPICA
Beyond EPICA Oldest Ice Core: 1,5 Myr of greenhouse gas – climate feedbacks
  • Funder: European Commission (EC)
  • Project Code: 815384
  • Funding stream: H2020 | RIA
,
EC| GOLD-ICE
Project
GOLD-ICE
Next generation analysis of the oldest ice core layers
  • Funder: European Commission (EC)
  • Project Code: 790280
  • Funding stream: H2020 | MSCA-IF-EF-ST
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