Chemical and visual characterisation of EGRIP glacial ice and cloudy bands within
Impurities in polar ice play a critical role in ice flow, deformation, and the integrity of the ice core record. Especially cloudy bands, visible layers with high impurity concentrations, are prominent features in ice from glacial periods. Their physical and chemical properties are poorly understood...
Published in: | The Cryosphere |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Copernicus Publications
2023
|
Subjects: | |
Online Access: | https://epic.awi.de/id/eprint/58072/ https://epic.awi.de/id/eprint/58072/1/tc-17-2021-2023.pdf https://doi.org/10.5194/tc-17-2021-2023 https://hdl.handle.net/10013/epic.fdace06d-7ef2-4c05-96b1-8e964cab95e7 |
id |
ftawi:oai:epic.awi.de:58072 |
---|---|
record_format |
openpolar |
spelling |
ftawi:oai:epic.awi.de:58072 2023-11-12T04:16:33+01:00 Chemical and visual characterisation of EGRIP glacial ice and cloudy bands within Stoll, Nicolas Westhoff, Julien Bohleber, Pascal Svensson, Anders Dahl-Jensen, Dorthe Barbante, Carlo Weikusat, Ilka 2023-05-12 application/pdf https://epic.awi.de/id/eprint/58072/ https://epic.awi.de/id/eprint/58072/1/tc-17-2021-2023.pdf https://doi.org/10.5194/tc-17-2021-2023 https://hdl.handle.net/10013/epic.fdace06d-7ef2-4c05-96b1-8e964cab95e7 unknown Copernicus Publications https://epic.awi.de/id/eprint/58072/1/tc-17-2021-2023.pdf Stoll, N. orcid:0000-0002-3219-8395 , Westhoff, J. , Bohleber, P. , Svensson, A. , Dahl-Jensen, D. , Barbante, C. and Weikusat, I. orcid:0000-0002-3023-6036 (2023) Chemical and visual characterisation of EGRIP glacial ice and cloudy bands within , The Cryosphere, 17 (5), pp. 2021-2043 . doi:10.5194/tc-17-2021-2023 <https://doi.org/10.5194/tc-17-2021-2023> , hdl:10013/epic.fdace06d-7ef2-4c05-96b1-8e964cab95e7 EPIC3The Cryosphere, Copernicus Publications, 17(5), pp. 2021-2043, ISSN: 1994-0416 Article isiRev 2023 ftawi https://doi.org/10.5194/tc-17-2021-2023 2023-10-22T23:23:01Z Impurities in polar ice play a critical role in ice flow, deformation, and the integrity of the ice core record. Especially cloudy bands, visible layers with high impurity concentrations, are prominent features in ice from glacial periods. Their physical and chemical properties are poorly understood, highlighting the need to analyse them in more detail. We bridge the gap between decimetre and micrometre scales by combining the visual stratigraphy line scanner, fabric analyser, microstructure mapping, Raman spectroscopy, and laser ablation inductively coupled plasma mass spectrometry 2D impurity imaging. We classified approximately 1300 cloudy bands from glacial ice from the East Greenland Ice-core Project (EGRIP) ice core into seven different types. We determine the localisation and mineralogy of more than 1000 micro-inclusions at 13 depths. The majority of the minerals found are related to terrestrial dust, such as quartz, feldspar, mica, and hematite. We further found carbonaceous particles, dolomite, and gypsum in high abundance. Rutile, anatase, epidote, titanite, and grossular are infrequently observed. The 2D impurity imaging at 20μm resolution revealed that cloudy bands are clearly distinguishable in the chemical data. Na, Mg, and Sr are mainly present at grain boundaries, whereas dust-related analytes, such as Al, Fe, and Ti, are located in the grain interior, forming clusters of insoluble impurities. We present novel vast micrometre-resolution insights into cloudy bands and describe the differences within and outside these bands. Combining the visual and chemical data results in new insights into the formation of different cloudy band types and could be the starting point for future in-depth studies on impurity signal integrity and internal deformation in deep polar ice cores. Article in Journal/Newspaper East Greenland East Greenland Ice-core Project Greenland Greenland ice core Greenland Ice core Project ice core The Cryosphere Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Greenland The Cryosphere 17 5 2021 2043 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Impurities in polar ice play a critical role in ice flow, deformation, and the integrity of the ice core record. Especially cloudy bands, visible layers with high impurity concentrations, are prominent features in ice from glacial periods. Their physical and chemical properties are poorly understood, highlighting the need to analyse them in more detail. We bridge the gap between decimetre and micrometre scales by combining the visual stratigraphy line scanner, fabric analyser, microstructure mapping, Raman spectroscopy, and laser ablation inductively coupled plasma mass spectrometry 2D impurity imaging. We classified approximately 1300 cloudy bands from glacial ice from the East Greenland Ice-core Project (EGRIP) ice core into seven different types. We determine the localisation and mineralogy of more than 1000 micro-inclusions at 13 depths. The majority of the minerals found are related to terrestrial dust, such as quartz, feldspar, mica, and hematite. We further found carbonaceous particles, dolomite, and gypsum in high abundance. Rutile, anatase, epidote, titanite, and grossular are infrequently observed. The 2D impurity imaging at 20μm resolution revealed that cloudy bands are clearly distinguishable in the chemical data. Na, Mg, and Sr are mainly present at grain boundaries, whereas dust-related analytes, such as Al, Fe, and Ti, are located in the grain interior, forming clusters of insoluble impurities. We present novel vast micrometre-resolution insights into cloudy bands and describe the differences within and outside these bands. Combining the visual and chemical data results in new insights into the formation of different cloudy band types and could be the starting point for future in-depth studies on impurity signal integrity and internal deformation in deep polar ice cores. |
format |
Article in Journal/Newspaper |
author |
Stoll, Nicolas Westhoff, Julien Bohleber, Pascal Svensson, Anders Dahl-Jensen, Dorthe Barbante, Carlo Weikusat, Ilka |
spellingShingle |
Stoll, Nicolas Westhoff, Julien Bohleber, Pascal Svensson, Anders Dahl-Jensen, Dorthe Barbante, Carlo Weikusat, Ilka Chemical and visual characterisation of EGRIP glacial ice and cloudy bands within |
author_facet |
Stoll, Nicolas Westhoff, Julien Bohleber, Pascal Svensson, Anders Dahl-Jensen, Dorthe Barbante, Carlo Weikusat, Ilka |
author_sort |
Stoll, Nicolas |
title |
Chemical and visual characterisation of EGRIP glacial ice and cloudy bands within |
title_short |
Chemical and visual characterisation of EGRIP glacial ice and cloudy bands within |
title_full |
Chemical and visual characterisation of EGRIP glacial ice and cloudy bands within |
title_fullStr |
Chemical and visual characterisation of EGRIP glacial ice and cloudy bands within |
title_full_unstemmed |
Chemical and visual characterisation of EGRIP glacial ice and cloudy bands within |
title_sort |
chemical and visual characterisation of egrip glacial ice and cloudy bands within |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://epic.awi.de/id/eprint/58072/ https://epic.awi.de/id/eprint/58072/1/tc-17-2021-2023.pdf https://doi.org/10.5194/tc-17-2021-2023 https://hdl.handle.net/10013/epic.fdace06d-7ef2-4c05-96b1-8e964cab95e7 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
East Greenland East Greenland Ice-core Project Greenland Greenland ice core Greenland Ice core Project ice core The Cryosphere |
genre_facet |
East Greenland East Greenland Ice-core Project Greenland Greenland ice core Greenland Ice core Project ice core The Cryosphere |
op_source |
EPIC3The Cryosphere, Copernicus Publications, 17(5), pp. 2021-2043, ISSN: 1994-0416 |
op_relation |
https://epic.awi.de/id/eprint/58072/1/tc-17-2021-2023.pdf Stoll, N. orcid:0000-0002-3219-8395 , Westhoff, J. , Bohleber, P. , Svensson, A. , Dahl-Jensen, D. , Barbante, C. and Weikusat, I. orcid:0000-0002-3023-6036 (2023) Chemical and visual characterisation of EGRIP glacial ice and cloudy bands within , The Cryosphere, 17 (5), pp. 2021-2043 . doi:10.5194/tc-17-2021-2023 <https://doi.org/10.5194/tc-17-2021-2023> , hdl:10013/epic.fdace06d-7ef2-4c05-96b1-8e964cab95e7 |
op_doi |
https://doi.org/10.5194/tc-17-2021-2023 |
container_title |
The Cryosphere |
container_volume |
17 |
container_issue |
5 |
container_start_page |
2021 |
op_container_end_page |
2043 |
_version_ |
1782333602481045504 |