Development of a clean hot water drill to access Subglacial Lake CECs, West Antarctica

IF 2.5 4区地球科学 Q2 GEOGRAPHY, PHYSICAL

Annals of Glaciology Pub Date : 2021-01-25 DOI:10.1017/aog.2020.88

Keith Makinson, P. Anker, J. Garcés, D. J. Goodger, S. Polfrey, Julius Rix, Alejandro Silva, A. Smith, J. Uribe, R. Zamora

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引用次数: 11

Abstract

Abstract Recent drilling successes on Rutford Ice Stream in West Antarctica demonstrate the viability of hot water drilling subglacial access holes to depths >2000 m. Having techniques to access deep subglacial environments reliably paves the way for subglacial lake exploration beneath the thick central West Antarctic Ice Sheet. An ideal candidate lake, overlain by ~2650 m of ice, identified by Centro de Estudios Científicos (CECs), Chile, has led to collaboration with British Antarctic Survey to access Subglacial Lake CECs (SLCECs). To conform with the Scientific Committee on Antarctic Research code of conduct, which provides a guide to responsible scientific exploration and stewardship of these pristine systems, any access drilling must minimise all aspects of contamination and disturbance of the subglacial environment. To meet these challenges, along with thicker ice and 2000 m elevation, pumping and water treatment systems developed for the Subglacial Lake Ellsworth project, together with new diesel generators, additional water heating and longer drill hose, are currently being integrated with the BEAMISH hot water drill. A dedicated test season near SLCECs will commission the new clean hot water drill, with testing and validation of all clean operating procedures. A subsequent season will then access SLCECs cleanly.

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开发一种清洁热水钻机，以进入南极洲西部的冰下CECs湖

摘要最近在南极洲西部Rutford冰流上的钻探成功证明了热水钻探冰下通道孔至2000米以上深度的可行性。拥有进入深层冰下环境的技术可靠地为在中西部厚冰盖下的冰下湖泊勘探铺平了道路。智利科学研究中心（CECs）确定了一个覆盖约2650米冰的理想候选湖，该湖已与英国南极调查局合作进入冰下湖CECs。为了遵守南极研究科学委员会的行为准则，该准则为负责任的科学探索和管理这些原始系统提供了指南，任何进入钻井都必须尽量减少对冰下环境的污染和干扰。为了应对这些挑战，加上更厚的冰层和2000米的海拔，为冰川下埃尔斯沃思湖项目开发的泵送和水处理系统，以及新的柴油发电机、额外的水加热和更长的钻杆，目前正在与BEAMISH热水钻机集成。SLCECs附近的一个专门的测试季节将调试新的清洁热水钻机，并对所有清洁操作程序进行测试和验证。接下来的一季将干净地访问SLCEC。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Annals of Glaciology GEOGRAPHY, PHYSICAL-GEOSCIENCES, MULTIDISCIPLINARY

CiteScore

8.20

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Annals of Glaciology publishes original scientific articles and letters in selected aspects of glaciology-the study of ice. Each issue of the Annals is thematic, focussing on a specific subject. The Council of the International Glaciological Society welcomes proposals for thematic issues from the glaciological community. Once a theme is approved, the Council appoints an Associate Chief Editor and a team of Scientific Editors to handle the submission, peer review and publication of papers.