DH-GAP04 borehole hydraulic head, 2011 to 2018, Greenland

The 650 m long proglacial bedrock borehole DH-GAP04 is angled under the Greenland Ice Sheet and is the only bedrock borehole in the Arctic providing deep groundwater information at an active ice sheet setting. DH-GAP04 is drilled at the Greenland ice sheet margin and the lower part of the borehole e...

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Bibliographic Details
Main Authors: Claesson Liljedahl, Lillemor, Hansson, Kent, Sundberg, Jan, Andersson, Lars, Kontula, Anne, Ruskenieemi, Timo, Henkemans, Emily, Mikkelsen, Per
Format: Dataset
Language:English
Published: PANGAEA 2021
Subjects:
Borehole
DATE/TIME
Depth
description
sediment/rock
DH-GAP04
DRILL
Drilling/drill rig
Greenland
groundwater
Head
hydraulic
hydraulic head
Kangerlussuaq
monitoring
permafrost
pressure
Pressure transducer (Druck PTX 1830)
Arctic
Ice
Ice Sheet
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.928193
https://doi.org/10.1594/PANGAEA.928193
Description
Summary:The 650 m long proglacial bedrock borehole DH-GAP04 is angled under the Greenland Ice Sheet and is the only bedrock borehole in the Arctic providing deep groundwater information at an active ice sheet setting. DH-GAP04 is drilled at the Greenland ice sheet margin and the lower part of the borehole extends in under the ice sheet. Permafrost is observed in the upper ~400 m of the borehole. DH-GAP04 is outfitted with a downhole instrument cluster that includes two inflatable packers, which divides the borehole in three sections: Section Up (400-561 m), Section Mid (561-571 m) and Section Low ( 571-651 m). Absolute pressure is measured in each section at 1-4 hour intervals and converted to hydraulic head. This dataset presents the daily average hydraulic head record spanning July, 2011 to December, 2018. Details on how absolute pressure is converted to hydraulic head is found in the accompanying "READ ME" file.

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