Discovery of argon in air-hydrate crystals in a deep ice core using scanning electron microscopy and energy-dispersive X-ray spectroscopy
Tiny samples of ancient atmosphere in air bubbles within ice cores contain argon (Ar), which can be used to reconstruct past temperature changes. At a sufficient depth, the air bubbles are compressed by the overburden pressure under low temperature and transform into air-hydrate crystals. While the...
Published in: | Journal of Glaciology |
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Language: | English |
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2022
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Online Access: | https://curis.ku.dk/portal/da/publications/discovery-of-argon-in-airhydrate-crystals-in-a-deep-ice-core-using-scanning-electron-microscopy-and-energydispersive-xray-spectroscopy(5b54e83d-0766-4ca5-8685-1819121a3f6b).html https://doi.org/10.1017/jog.2021.115 https://curis.ku.dk/ws/files/343344654/discovery_of_argon_in_air_hydrate_crystals_in_a_deep_ice_core_using_scanning_electron_microscopy_and_energy_dispersive_x_ray_spectroscopy.pdf |
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ftcopenhagenunip:oai:pure.atira.dk:publications/5b54e83d-0766-4ca5-8685-1819121a3f6b 2024-06-09T07:46:26+00:00 Discovery of argon in air-hydrate crystals in a deep ice core using scanning electron microscopy and energy-dispersive X-ray spectroscopy Uchida, Tsutomu Shigeyama, Wataru Oyabu, Ikumi Goto-Azuma, Kumiko Nakazawa, Fumio Homma, Tomoyuki Kawamura, Kenji Dahl-Jensen, Dorthe 2022 application/pdf https://curis.ku.dk/portal/da/publications/discovery-of-argon-in-airhydrate-crystals-in-a-deep-ice-core-using-scanning-electron-microscopy-and-energydispersive-xray-spectroscopy(5b54e83d-0766-4ca5-8685-1819121a3f6b).html https://doi.org/10.1017/jog.2021.115 https://curis.ku.dk/ws/files/343344654/discovery_of_argon_in_air_hydrate_crystals_in_a_deep_ice_core_using_scanning_electron_microscopy_and_energy_dispersive_x_ray_spectroscopy.pdf eng eng info:eu-repo/semantics/openAccess Uchida , T , Shigeyama , W , Oyabu , I , Goto-Azuma , K , Nakazawa , F , Homma , T , Kawamura , K & Dahl-Jensen , D 2022 , ' Discovery of argon in air-hydrate crystals in a deep ice core using scanning electron microscopy and energy-dispersive X-ray spectroscopy ' , Journal of Glaciology , vol. 68 , no. 269 , pp. 547-556 . https://doi.org/10.1017/jog.2021.115 Air hydrate argon energy-dispersive X-ray spectroscopy NEEM ice core scanning electron microscopy article 2022 ftcopenhagenunip https://doi.org/10.1017/jog.2021.115 2024-05-16T11:29:28Z Tiny samples of ancient atmosphere in air bubbles within ice cores contain argon (Ar), which can be used to reconstruct past temperature changes. At a sufficient depth, the air bubbles are compressed by the overburden pressure under low temperature and transform into air-hydrate crystals. While the oxygen (O2) and nitrogen (N2) molecules have indeed been identified in the air-hydrate crystals with Raman spectroscopy, direct observational knowledge of the distribution of Ar at depth within ice sheet and its enclathration has been lacking. In this study, we applied scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) to five air-hydrate crystals in the Greenland NEEM ice core, finding them to contain Ar and N. Given that Ar cannot be detected by Raman spectroscopy, the method commonly used for O2 and N2, the SEM-EDS measurement method may become increasingly useful for measuring inert gases in deep ice cores. Article in Journal/Newspaper Greenland ice core Ice Sheet Journal of Glaciology University of Copenhagen: Research Greenland Journal of Glaciology 68 269 547 556 |
institution |
Open Polar |
collection |
University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
topic |
Air hydrate argon energy-dispersive X-ray spectroscopy NEEM ice core scanning electron microscopy |
spellingShingle |
Air hydrate argon energy-dispersive X-ray spectroscopy NEEM ice core scanning electron microscopy Uchida, Tsutomu Shigeyama, Wataru Oyabu, Ikumi Goto-Azuma, Kumiko Nakazawa, Fumio Homma, Tomoyuki Kawamura, Kenji Dahl-Jensen, Dorthe Discovery of argon in air-hydrate crystals in a deep ice core using scanning electron microscopy and energy-dispersive X-ray spectroscopy |
topic_facet |
Air hydrate argon energy-dispersive X-ray spectroscopy NEEM ice core scanning electron microscopy |
description |
Tiny samples of ancient atmosphere in air bubbles within ice cores contain argon (Ar), which can be used to reconstruct past temperature changes. At a sufficient depth, the air bubbles are compressed by the overburden pressure under low temperature and transform into air-hydrate crystals. While the oxygen (O2) and nitrogen (N2) molecules have indeed been identified in the air-hydrate crystals with Raman spectroscopy, direct observational knowledge of the distribution of Ar at depth within ice sheet and its enclathration has been lacking. In this study, we applied scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) to five air-hydrate crystals in the Greenland NEEM ice core, finding them to contain Ar and N. Given that Ar cannot be detected by Raman spectroscopy, the method commonly used for O2 and N2, the SEM-EDS measurement method may become increasingly useful for measuring inert gases in deep ice cores. |
format |
Article in Journal/Newspaper |
author |
Uchida, Tsutomu Shigeyama, Wataru Oyabu, Ikumi Goto-Azuma, Kumiko Nakazawa, Fumio Homma, Tomoyuki Kawamura, Kenji Dahl-Jensen, Dorthe |
author_facet |
Uchida, Tsutomu Shigeyama, Wataru Oyabu, Ikumi Goto-Azuma, Kumiko Nakazawa, Fumio Homma, Tomoyuki Kawamura, Kenji Dahl-Jensen, Dorthe |
author_sort |
Uchida, Tsutomu |
title |
Discovery of argon in air-hydrate crystals in a deep ice core using scanning electron microscopy and energy-dispersive X-ray spectroscopy |
title_short |
Discovery of argon in air-hydrate crystals in a deep ice core using scanning electron microscopy and energy-dispersive X-ray spectroscopy |
title_full |
Discovery of argon in air-hydrate crystals in a deep ice core using scanning electron microscopy and energy-dispersive X-ray spectroscopy |
title_fullStr |
Discovery of argon in air-hydrate crystals in a deep ice core using scanning electron microscopy and energy-dispersive X-ray spectroscopy |
title_full_unstemmed |
Discovery of argon in air-hydrate crystals in a deep ice core using scanning electron microscopy and energy-dispersive X-ray spectroscopy |
title_sort |
discovery of argon in air-hydrate crystals in a deep ice core using scanning electron microscopy and energy-dispersive x-ray spectroscopy |
publishDate |
2022 |
url |
https://curis.ku.dk/portal/da/publications/discovery-of-argon-in-airhydrate-crystals-in-a-deep-ice-core-using-scanning-electron-microscopy-and-energydispersive-xray-spectroscopy(5b54e83d-0766-4ca5-8685-1819121a3f6b).html https://doi.org/10.1017/jog.2021.115 https://curis.ku.dk/ws/files/343344654/discovery_of_argon_in_air_hydrate_crystals_in_a_deep_ice_core_using_scanning_electron_microscopy_and_energy_dispersive_x_ray_spectroscopy.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland ice core Ice Sheet Journal of Glaciology |
genre_facet |
Greenland ice core Ice Sheet Journal of Glaciology |
op_source |
Uchida , T , Shigeyama , W , Oyabu , I , Goto-Azuma , K , Nakazawa , F , Homma , T , Kawamura , K & Dahl-Jensen , D 2022 , ' Discovery of argon in air-hydrate crystals in a deep ice core using scanning electron microscopy and energy-dispersive X-ray spectroscopy ' , Journal of Glaciology , vol. 68 , no. 269 , pp. 547-556 . https://doi.org/10.1017/jog.2021.115 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1017/jog.2021.115 |
container_title |
Journal of Glaciology |
container_volume |
68 |
container_issue |
269 |
container_start_page |
547 |
op_container_end_page |
556 |
_version_ |
1801376280968429568 |