Air reverse circulation at the hole bottom in ice-core drilling
ABSTRACT Ice-core drilling to depths of 200–300 m is an important part of research studies concerned with paleoclimate reconstruction and anthropogenic climate change. However, conventional drilling methods face difficulties due to firn permeability. We have developed an electromechanical ice-core d...
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Online Access: | http://dx.doi.org/10.1017/jog.2018.95 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143018000953 |
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crcambridgeupr:10.1017/jog.2018.95 2024-05-19T07:41:59+00:00 Air reverse circulation at the hole bottom in ice-core drilling HU, ZHENGYI TALALAY, PAVEL ZHENG, ZHICHUAN CAO, PINLU SHI, GUITAO LI, YUANSHENG FAN, XIAOPENG MA, HONGMEI 2019 http://dx.doi.org/10.1017/jog.2018.95 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143018000953 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Journal of Glaciology volume 65, issue 249, page 149-156 ISSN 0022-1430 1727-5652 journal-article 2019 crcambridgeupr https://doi.org/10.1017/jog.2018.95 2024-04-25T06:51:23Z ABSTRACT Ice-core drilling to depths of 200–300 m is an important part of research studies concerned with paleoclimate reconstruction and anthropogenic climate change. However, conventional drilling methods face difficulties due to firn permeability. We have developed an electromechanical ice-core drill with air reverse circulation at the hole bottom. We believe that the new drilling system will recover ice cores faster than shallow auger drills, with high efficiency and low energy consumption. The theoretically estimated up-hole speed of the airflow should be not <7.7 m s −1 to allow proper removal of ice cuttings from the borehole bottom. The computer simulation and test results showed that the design of the new ice-coring drill is feasible. The maximum allowed penetration rate depends by square law on airflow. Article in Journal/Newspaper ice core Journal of Glaciology Cambridge University Press Journal of Glaciology 65 249 149 156 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
ABSTRACT Ice-core drilling to depths of 200–300 m is an important part of research studies concerned with paleoclimate reconstruction and anthropogenic climate change. However, conventional drilling methods face difficulties due to firn permeability. We have developed an electromechanical ice-core drill with air reverse circulation at the hole bottom. We believe that the new drilling system will recover ice cores faster than shallow auger drills, with high efficiency and low energy consumption. The theoretically estimated up-hole speed of the airflow should be not <7.7 m s −1 to allow proper removal of ice cuttings from the borehole bottom. The computer simulation and test results showed that the design of the new ice-coring drill is feasible. The maximum allowed penetration rate depends by square law on airflow. |
format |
Article in Journal/Newspaper |
author |
HU, ZHENGYI TALALAY, PAVEL ZHENG, ZHICHUAN CAO, PINLU SHI, GUITAO LI, YUANSHENG FAN, XIAOPENG MA, HONGMEI |
spellingShingle |
HU, ZHENGYI TALALAY, PAVEL ZHENG, ZHICHUAN CAO, PINLU SHI, GUITAO LI, YUANSHENG FAN, XIAOPENG MA, HONGMEI Air reverse circulation at the hole bottom in ice-core drilling |
author_facet |
HU, ZHENGYI TALALAY, PAVEL ZHENG, ZHICHUAN CAO, PINLU SHI, GUITAO LI, YUANSHENG FAN, XIAOPENG MA, HONGMEI |
author_sort |
HU, ZHENGYI |
title |
Air reverse circulation at the hole bottom in ice-core drilling |
title_short |
Air reverse circulation at the hole bottom in ice-core drilling |
title_full |
Air reverse circulation at the hole bottom in ice-core drilling |
title_fullStr |
Air reverse circulation at the hole bottom in ice-core drilling |
title_full_unstemmed |
Air reverse circulation at the hole bottom in ice-core drilling |
title_sort |
air reverse circulation at the hole bottom in ice-core drilling |
publisher |
Cambridge University Press (CUP) |
publishDate |
2019 |
url |
http://dx.doi.org/10.1017/jog.2018.95 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143018000953 |
genre |
ice core Journal of Glaciology |
genre_facet |
ice core Journal of Glaciology |
op_source |
Journal of Glaciology volume 65, issue 249, page 149-156 ISSN 0022-1430 1727-5652 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2018.95 |
container_title |
Journal of Glaciology |
container_volume |
65 |
container_issue |
249 |
container_start_page |
149 |
op_container_end_page |
156 |
_version_ |
1799481594428260352 |