Theoretical and Experimental Analysis for Cleaning Ice Cores from Estisol TM 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, Estisol TM 140, will be used. Newly drilled ice cores will be retrieved from the...
Published in: | Applied Sciences |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
MDPI AG
2021
|
Subjects: | |
Online Access: | https://doi.org/10.3390/app11093830 https://doaj.org/article/bee4f35d1d6a44ecad1049d538f4b042 |
id |
ftdoajarticles:oai:doaj.org/article:bee4f35d1d6a44ecad1049d538f4b042 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:bee4f35d1d6a44ecad1049d538f4b042 2023-05-15T13:33:58+02:00 Theoretical and Experimental Analysis for Cleaning Ice Cores from Estisol TM 140 Drill Liquid Francesco Enrichi Dorthe Dahl-Jensen Jørgen Peder Steffensen Carlo Barbante 2021-04-01T00:00:00Z https://doi.org/10.3390/app11093830 https://doaj.org/article/bee4f35d1d6a44ecad1049d538f4b042 EN eng MDPI AG https://www.mdpi.com/2076-3417/11/9/3830 https://doaj.org/toc/2076-3417 doi:10.3390/app11093830 2076-3417 https://doaj.org/article/bee4f35d1d6a44ecad1049d538f4b042 Applied Sciences, Vol 11, Iss 3830, p 3830 (2021) ice cores drilling Estisol Beyond EPICA Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 article 2021 ftdoajarticles https://doi.org/10.3390/app11093830 2022-12-31T13:49:27Z 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, Estisol TM 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 Directory of Open Access Journals: DOAJ Articles East Antarctica Greenland Applied Sciences 11 9 3830 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
ice cores drilling Estisol Beyond EPICA Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 |
spellingShingle |
ice cores drilling Estisol Beyond EPICA Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Francesco Enrichi Dorthe Dahl-Jensen Jørgen Peder Steffensen Carlo Barbante Theoretical and Experimental Analysis for Cleaning Ice Cores from Estisol TM 140 Drill Liquid |
topic_facet |
ice cores drilling Estisol Beyond EPICA Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 |
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, Estisol TM 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 |
Francesco Enrichi Dorthe Dahl-Jensen Jørgen Peder Steffensen Carlo Barbante |
author_facet |
Francesco Enrichi Dorthe Dahl-Jensen Jørgen Peder Steffensen Carlo Barbante |
author_sort |
Francesco Enrichi |
title |
Theoretical and Experimental Analysis for Cleaning Ice Cores from Estisol TM 140 Drill Liquid |
title_short |
Theoretical and Experimental Analysis for Cleaning Ice Cores from Estisol TM 140 Drill Liquid |
title_full |
Theoretical and Experimental Analysis for Cleaning Ice Cores from Estisol TM 140 Drill Liquid |
title_fullStr |
Theoretical and Experimental Analysis for Cleaning Ice Cores from Estisol TM 140 Drill Liquid |
title_full_unstemmed |
Theoretical and Experimental Analysis for Cleaning Ice Cores from Estisol TM 140 Drill Liquid |
title_sort |
theoretical and experimental analysis for cleaning ice cores from estisol tm 140 drill liquid |
publisher |
MDPI AG |
publishDate |
2021 |
url |
https://doi.org/10.3390/app11093830 https://doaj.org/article/bee4f35d1d6a44ecad1049d538f4b042 |
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_source |
Applied Sciences, Vol 11, Iss 3830, p 3830 (2021) |
op_relation |
https://www.mdpi.com/2076-3417/11/9/3830 https://doaj.org/toc/2076-3417 doi:10.3390/app11093830 2076-3417 https://doaj.org/article/bee4f35d1d6a44ecad1049d538f4b042 |
op_doi |
https://doi.org/10.3390/app11093830 |
container_title |
Applied Sciences |
container_volume |
11 |
container_issue |
9 |
container_start_page |
3830 |
_version_ |
1766047428984700928 |