Supraglacial River Forcing of Subglacial Water Storage and Diurnal Ice Sheet Motion

Smith, L. C.; Andrews, L. C.; Pitcher, L. H; Overstreet, B. T.; Rennermalm, Å. K.; Cooper, M. G.; Cooley, S. W.; Ryan, J. C.; Miège, C.; Kershner, C.; Simpson, C. E.

doi:10.1029/2020gl091418

Advanced Search

Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

Advanced Search
Custom Query

All these words:

For very narrow results

This exact word or phrase:

When looking for a specific result

Any of these words:

Best used for discovery & interchangable words

None of these words:

Recommended to be used in conjunction with other fields

Language:

Dates

Publication Date Range:

to

Document Data

Title:

Document Type:

Library

Collection:

Series:

People

Author:

Clear All

Query Builder

Query box

Clear All

For additional assistance using the Custom Query please check out our Help Page

i

Supraglacial River Forcing of Subglacial Water Storage and Diurnal Ice Sheet Motion

2021
By Smith, L. C. ; Andrews, L. C. ; Pitcher, L. H ; ...
Source: Geophysical Research Letters, 48(7)

[PDF-3.07 MB]

Details Supporting Files You May Also Like

Details:

Journal Title:

Geophysical Research Letters
Personal Author:

Smith, L. C. ; Andrews, L. C. ; Pitcher, L. H ; Overstreet, B. T. ; Rennermalm, Å. K. ; ... More +

Smith, L. C. ; Andrews, L. C. ; Pitcher, L. H ; Overstreet, B. T. ; Rennermalm, Å. K. ; Cooper, M. G. ; Cooley, S. W. ; Ryan, J. C. ; Miège, C. ; Kershner, C. ; Simpson, C. E. Less -
NOAA Program & Office:

CIRES (Cooperative Institute for Research in Environmental Sciences)
Description:

Surface melting impacts ice sheet sliding by supplying water to the bed, but subglacial processes driving ice accelerations are complex. We examine linkages between surface runoff, transient subglacial water storage, and short‐term ice motion from 168 consecutive hourly measurements of meltwater discharge (moulin input) and GPS‐derived ice surface motion for Rio Behar, a ∼60 km2 moulin‐terminating supraglacial river catchment on the southwest Greenland Ice Sheet. Short‐term accelerations in ice speed correlate strongly with lag‐corrected measures of supraglacial river discharge (r = 0.9, τ = 0.7, p < 0.01). Though our 7 days record cannot address seasonal‐scale forcing, diurnal ice accelerations align with normalized differenced supraglacial and proglacial discharge, a proxy for subglacial storage change, better than GPS‐derived ice surface uplift. These observations counter theoretical steady state basal sliding laws and suggest that moulin and proglacially induced fluctuations in subglacial water storage, rather than absolute subglacial water storage, drive short‐term ice accelerations.
Keywords:

[+]

General Earth And Planetary Sciences Geophysics
Source:

Geophysical Research Letters, 48(7)
DOI:

https://doi.org/10.1029/2020gl091418
ISSN:

0094-8276;1944-8007;
Publisher:

American Geophysical Union (AGU)
Document Type:

Journal Article
License:

https://creativecommons.org/licenses/by/4.0/
Rights Information:

CC BY
Compliance:

Library
Main Document Checksum:

[+]

urn:sha256:d21be5e260c1d50739be8e60bef9590e8391cd9ca937df756be5a2a144025bd2
Download URL:

https://repository.library.noaa.gov/view/noaa/58368/noaa_58368_DS1.pdf
File Type:

Machine readable version (XML)

xml

More +