Theoretical and Experimental Analysis for Cleaning Ice Cores from EstisolTM 140 Drill Liquid
To reconstruct climate history of the past 1.5 Million years, the project: Beyond EPICA Oldest Ice (BEOI) will drill about 2700 m of ice core in East Antarctica (2021–2025). As drilling fluid, an aliphatic ester fluid, EstisolTM 140, will be used. Newly drilled ice cores will be retrieved from the...
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ftopenaccessrep:oai:zenodo.org:154086 2024-05-12T07:54:40+00:00 Theoretical and Experimental Analysis for Cleaning Ice Cores from EstisolTM 140 Drill Liquid Enrichi, Francesco Dahl-Jensen, Dorthe Steffensen, Jørgen Peder Barbante, Carlo 2021-04-23 https://www.openaccessrepository.it/record/154086 https://doi.org/10.3390/app11093830 eng eng info:eu-repo/grantAgreement/EC/H2020/815384/ url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/154086 doi:10.3390/app11093830 info:eu-repo/semantics/openAccess http://www.opendefinition.org/licenses/cc-by Fluid Flow and Transfer Processes Computer Science Applications Process Chemistry and Technology General Engineering Instrumentation General Materials Science Horizon 2020 Framework Programme info:eu-repo/semantics/article publication-article 2021 ftopenaccessrep https://doi.org/10.3390/app11093830 2024-04-17T14:59:29Z To reconstruct climate history of the past 1.5 Million years, the project: Beyond EPICA Oldest Ice (BEOI) will drill about 2700 m of ice core in East Antarctica (2021–2025). As drilling fluid, an aliphatic ester fluid, EstisolTM 140, will be used. Newly drilled ice cores will be retrieved from the drill soaked in fluid, and this fluid should be removed from the cores. Most of it will be vacuum-cleaned off in a Fluid Extraction Device and wiped off with paper towels. Based on our experiences in Greenland deep ice coring, most of the residual fluid can be removed by storing the cores openly on shelves in a ventilated room. After a week of "drying", the cores have a dry feel, handling them do not give "wet" gloves and they can easily be marked with lead pencils. This paper presents a theoretical investigation and some simple testing on the "drying" process. The rates of sublimation of ice and evaporation of fluid have been calculated at different temperatures. The calculations show that sublimation of the ice core should not occur, and that evaporation of fluid should be almost negligible. Our test results support these calculations, but also revealed significant fluid run-off and dripping, resulting in the removal of most of the fluid in a couple of days, independent of temperature and ventilation conditions. Finally, we discuss crucial factors that ensure optimal long-term ice core preservation in storage, such as temperature stability, defrosting cycles of freezers and open core storage versus storage of cores in insulated crates. Article in Journal/Newspaper Antarc* Antarctica East Antarctica EPICA Greenland ice core Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository East Antarctica Greenland Applied Sciences 11 9 3830 |
institution |
Open Polar |
collection |
Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository |
op_collection_id |
ftopenaccessrep |
language |
English |
topic |
Fluid Flow and Transfer Processes Computer Science Applications Process Chemistry and Technology General Engineering Instrumentation General Materials Science Horizon 2020 Framework Programme |
spellingShingle |
Fluid Flow and Transfer Processes Computer Science Applications Process Chemistry and Technology General Engineering Instrumentation General Materials Science Horizon 2020 Framework Programme Enrichi, Francesco Dahl-Jensen, Dorthe Steffensen, Jørgen Peder Barbante, Carlo Theoretical and Experimental Analysis for Cleaning Ice Cores from EstisolTM 140 Drill Liquid |
topic_facet |
Fluid Flow and Transfer Processes Computer Science Applications Process Chemistry and Technology General Engineering Instrumentation General Materials Science Horizon 2020 Framework Programme |
description |
To reconstruct climate history of the past 1.5 Million years, the project: Beyond EPICA Oldest Ice (BEOI) will drill about 2700 m of ice core in East Antarctica (2021–2025). As drilling fluid, an aliphatic ester fluid, EstisolTM 140, will be used. Newly drilled ice cores will be retrieved from the drill soaked in fluid, and this fluid should be removed from the cores. Most of it will be vacuum-cleaned off in a Fluid Extraction Device and wiped off with paper towels. Based on our experiences in Greenland deep ice coring, most of the residual fluid can be removed by storing the cores openly on shelves in a ventilated room. After a week of "drying", the cores have a dry feel, handling them do not give "wet" gloves and they can easily be marked with lead pencils. This paper presents a theoretical investigation and some simple testing on the "drying" process. The rates of sublimation of ice and evaporation of fluid have been calculated at different temperatures. The calculations show that sublimation of the ice core should not occur, and that evaporation of fluid should be almost negligible. Our test results support these calculations, but also revealed significant fluid run-off and dripping, resulting in the removal of most of the fluid in a couple of days, independent of temperature and ventilation conditions. Finally, we discuss crucial factors that ensure optimal long-term ice core preservation in storage, such as temperature stability, defrosting cycles of freezers and open core storage versus storage of cores in insulated crates. |
format |
Article in Journal/Newspaper |
author |
Enrichi, Francesco Dahl-Jensen, Dorthe Steffensen, Jørgen Peder Barbante, Carlo |
author_facet |
Enrichi, Francesco Dahl-Jensen, Dorthe Steffensen, Jørgen Peder Barbante, Carlo |
author_sort |
Enrichi, Francesco |
title |
Theoretical and Experimental Analysis for Cleaning Ice Cores from EstisolTM 140 Drill Liquid |
title_short |
Theoretical and Experimental Analysis for Cleaning Ice Cores from EstisolTM 140 Drill Liquid |
title_full |
Theoretical and Experimental Analysis for Cleaning Ice Cores from EstisolTM 140 Drill Liquid |
title_fullStr |
Theoretical and Experimental Analysis for Cleaning Ice Cores from EstisolTM 140 Drill Liquid |
title_full_unstemmed |
Theoretical and Experimental Analysis for Cleaning Ice Cores from EstisolTM 140 Drill Liquid |
title_sort |
theoretical and experimental analysis for cleaning ice cores from estisoltm 140 drill liquid |
publishDate |
2021 |
url |
https://www.openaccessrepository.it/record/154086 https://doi.org/10.3390/app11093830 |
geographic |
East Antarctica Greenland |
geographic_facet |
East Antarctica Greenland |
genre |
Antarc* Antarctica East Antarctica EPICA Greenland ice core |
genre_facet |
Antarc* Antarctica East Antarctica EPICA Greenland ice core |
op_relation |
info:eu-repo/grantAgreement/EC/H2020/815384/ url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/154086 doi:10.3390/app11093830 |
op_rights |
info:eu-repo/semantics/openAccess http://www.opendefinition.org/licenses/cc-by |
op_doi |
https://doi.org/10.3390/app11093830 |
container_title |
Applied Sciences |
container_volume |
11 |
container_issue |
9 |
container_start_page |
3830 |
_version_ |
1798851270517194752 |