Diurnal water-pressure fluctuations: timing and pattern of termination below Bench Glacier, Alaska, USA
Observations from basal water-pressure sensors along the length of Bench Glacier, Alaska, USA, show that diurnal fluctuations of water pressure are seasonal and restricted to summer. Most notable about these fluctuations is their disappearance in the late summer and early autumn, long before the sea...
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ftunivmontana:oai:scholarworks.umt.edu:geosci_pubs-1028 2024-09-09T19:41:10+00:00 Diurnal water-pressure fluctuations: timing and pattern of termination below Bench Glacier, Alaska, USA Fudge, T. J. Harper, Joel T. Humphrey, Neil Pfeffer, W. Tad 2005-01-01T08:00:00Z application/pdf https://scholarworks.umt.edu/geosci_pubs/30 https://doi.org/10.3189/172756405781813799 https://scholarworks.umt.edu/context/geosci_pubs/article/1028/viewcontent/Diurnal_water_pressure_fluctuations.pdf unknown ScholarWorks at University of Montana https://scholarworks.umt.edu/geosci_pubs/30 doi:10.3189/172756405781813799 https://scholarworks.umt.edu/context/geosci_pubs/article/1028/viewcontent/Diurnal_water_pressure_fluctuations.pdf © 2005 International Glaciological Society Geosciences Faculty Publications basal water-pressure sensors Bench Glacier diurnal fluctuations diurnal meltwater input Earth Sciences Glaciology text 2005 ftunivmontana https://doi.org/10.3189/172756405781813799 2024-06-20T05:32:53Z Observations from basal water-pressure sensors along the length of Bench Glacier, Alaska, USA, show that diurnal fluctuations of water pressure are seasonal and restricted to summer. Most notable about these fluctuations is their disappearance in the late summer and early autumn, long before the seasonal end of diurnal meltwater input. Here we present data documenting the end of diurnal water-pressure fluctuations during the 2002 and 2003 melt seasons. The end of diurnal fluctuations occurred abruptly in multiple boreholes spaced meters to kilometers apart. There was no obvious spatial progression of termination events, and a clear correlation with meteorological forcing or discharge in the outlet stream was not apparent. After diurnal pressure fluctuations ended, basal water pressure returned to a high, generally steady, value either in an irregular pattern or by a distinct increase. This high water pressure was interrupted by episodic, acyclic events throughout the autumn before becoming stable and high in winter. Text glacier Alaska University of Montana: ScholarWorks Annals of Glaciology 40 102 106 |
institution |
Open Polar |
collection |
University of Montana: ScholarWorks |
op_collection_id |
ftunivmontana |
language |
unknown |
topic |
basal water-pressure sensors Bench Glacier diurnal fluctuations diurnal meltwater input Earth Sciences Glaciology |
spellingShingle |
basal water-pressure sensors Bench Glacier diurnal fluctuations diurnal meltwater input Earth Sciences Glaciology Fudge, T. J. Harper, Joel T. Humphrey, Neil Pfeffer, W. Tad Diurnal water-pressure fluctuations: timing and pattern of termination below Bench Glacier, Alaska, USA |
topic_facet |
basal water-pressure sensors Bench Glacier diurnal fluctuations diurnal meltwater input Earth Sciences Glaciology |
description |
Observations from basal water-pressure sensors along the length of Bench Glacier, Alaska, USA, show that diurnal fluctuations of water pressure are seasonal and restricted to summer. Most notable about these fluctuations is their disappearance in the late summer and early autumn, long before the seasonal end of diurnal meltwater input. Here we present data documenting the end of diurnal water-pressure fluctuations during the 2002 and 2003 melt seasons. The end of diurnal fluctuations occurred abruptly in multiple boreholes spaced meters to kilometers apart. There was no obvious spatial progression of termination events, and a clear correlation with meteorological forcing or discharge in the outlet stream was not apparent. After diurnal pressure fluctuations ended, basal water pressure returned to a high, generally steady, value either in an irregular pattern or by a distinct increase. This high water pressure was interrupted by episodic, acyclic events throughout the autumn before becoming stable and high in winter. |
format |
Text |
author |
Fudge, T. J. Harper, Joel T. Humphrey, Neil Pfeffer, W. Tad |
author_facet |
Fudge, T. J. Harper, Joel T. Humphrey, Neil Pfeffer, W. Tad |
author_sort |
Fudge, T. J. |
title |
Diurnal water-pressure fluctuations: timing and pattern of termination below Bench Glacier, Alaska, USA |
title_short |
Diurnal water-pressure fluctuations: timing and pattern of termination below Bench Glacier, Alaska, USA |
title_full |
Diurnal water-pressure fluctuations: timing and pattern of termination below Bench Glacier, Alaska, USA |
title_fullStr |
Diurnal water-pressure fluctuations: timing and pattern of termination below Bench Glacier, Alaska, USA |
title_full_unstemmed |
Diurnal water-pressure fluctuations: timing and pattern of termination below Bench Glacier, Alaska, USA |
title_sort |
diurnal water-pressure fluctuations: timing and pattern of termination below bench glacier, alaska, usa |
publisher |
ScholarWorks at University of Montana |
publishDate |
2005 |
url |
https://scholarworks.umt.edu/geosci_pubs/30 https://doi.org/10.3189/172756405781813799 https://scholarworks.umt.edu/context/geosci_pubs/article/1028/viewcontent/Diurnal_water_pressure_fluctuations.pdf |
genre |
glacier Alaska |
genre_facet |
glacier Alaska |
op_source |
Geosciences Faculty Publications |
op_relation |
https://scholarworks.umt.edu/geosci_pubs/30 doi:10.3189/172756405781813799 https://scholarworks.umt.edu/context/geosci_pubs/article/1028/viewcontent/Diurnal_water_pressure_fluctuations.pdf |
op_rights |
© 2005 International Glaciological Society |
op_doi |
https://doi.org/10.3189/172756405781813799 |
container_title |
Annals of Glaciology |
container_volume |
40 |
container_start_page |
102 |
op_container_end_page |
106 |
_version_ |
1809910618742849536 |