Changing position of the GPS receivers over those periods including the two lake drainage events
Figure 4. Changing position of the GPS receivers over those periods including the two lake drainage events. East–west and south–north relative positions for the days 16–20 June 2011. Note the trajectories of flow are from right to left in this figure. Abstract Supraglacial lake drainage on the Green...
Main Authors: | , , , , , |
---|---|
Format: | Still Image |
Language: | unknown |
Published: |
IOP Publishing
2013
|
Subjects: | |
Online Access: | https://dx.doi.org/10.6084/m9.figshare.1011477.v1 https://iop.figshare.com/articles/figure/_Changing_position_of_the_GPS_receivers_over_those_periods_including_the_two_lake_drainage_events/1011477/1 |
id |
ftdatacite:10.6084/m9.figshare.1011477.v1 |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.6084/m9.figshare.1011477.v1 2023-05-15T16:29:21+02:00 Changing position of the GPS receivers over those periods including the two lake drainage events Tedesco, Marco Willis, Ian C Hoffman, Matthew J Banwell, Alison F Alexander, Patrick Arnold, Neil S 2013 https://dx.doi.org/10.6084/m9.figshare.1011477.v1 https://iop.figshare.com/articles/figure/_Changing_position_of_the_GPS_receivers_over_those_periods_including_the_two_lake_drainage_events/1011477/1 unknown IOP Publishing https://dx.doi.org/10.6084/m9.figshare.1011477 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Environmental Science Image Figure graphic ImageObject 2013 ftdatacite https://doi.org/10.6084/m9.figshare.1011477.v1 https://doi.org/10.6084/m9.figshare.1011477 2021-11-05T12:55:41Z Figure 4. Changing position of the GPS receivers over those periods including the two lake drainage events. East–west and south–north relative positions for the days 16–20 June 2011. Note the trajectories of flow are from right to left in this figure. Abstract Supraglacial lake drainage on the Greenland ice sheet opens surface-to-bed connections, reduces basal friction, and temporarily increases ice flow velocities by up to an order of magnitude. Existing field-based observations of lake drainages and their impact on ice dynamics are limited, and focus on one specific draining mechanism. Here, we report and analyse global positioning system measurements of ice velocity and elevation made at five locations surrounding two lakes that drained by different mechanisms and produced different dynamic responses. For the lake that drained slowly (>24 h) by overtopping its basin, delivering water via a channel to a pre-existing moulin, speedup and uplift were less than half those associated with a lake that drained rapidly (~2 h) through hydrofracturing and the creation of new moulins in the lake bottom. Our results suggest that the mode and associated rate of lake drainage govern the impact on ice dynamics. Still Image Greenland Ice Sheet DataCite Metadata Store (German National Library of Science and Technology) Greenland |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Environmental Science |
spellingShingle |
Environmental Science Tedesco, Marco Willis, Ian C Hoffman, Matthew J Banwell, Alison F Alexander, Patrick Arnold, Neil S Changing position of the GPS receivers over those periods including the two lake drainage events |
topic_facet |
Environmental Science |
description |
Figure 4. Changing position of the GPS receivers over those periods including the two lake drainage events. East–west and south–north relative positions for the days 16–20 June 2011. Note the trajectories of flow are from right to left in this figure. Abstract Supraglacial lake drainage on the Greenland ice sheet opens surface-to-bed connections, reduces basal friction, and temporarily increases ice flow velocities by up to an order of magnitude. Existing field-based observations of lake drainages and their impact on ice dynamics are limited, and focus on one specific draining mechanism. Here, we report and analyse global positioning system measurements of ice velocity and elevation made at five locations surrounding two lakes that drained by different mechanisms and produced different dynamic responses. For the lake that drained slowly (>24 h) by overtopping its basin, delivering water via a channel to a pre-existing moulin, speedup and uplift were less than half those associated with a lake that drained rapidly (~2 h) through hydrofracturing and the creation of new moulins in the lake bottom. Our results suggest that the mode and associated rate of lake drainage govern the impact on ice dynamics. |
format |
Still Image |
author |
Tedesco, Marco Willis, Ian C Hoffman, Matthew J Banwell, Alison F Alexander, Patrick Arnold, Neil S |
author_facet |
Tedesco, Marco Willis, Ian C Hoffman, Matthew J Banwell, Alison F Alexander, Patrick Arnold, Neil S |
author_sort |
Tedesco, Marco |
title |
Changing position of the GPS receivers over those periods including the two lake drainage events |
title_short |
Changing position of the GPS receivers over those periods including the two lake drainage events |
title_full |
Changing position of the GPS receivers over those periods including the two lake drainage events |
title_fullStr |
Changing position of the GPS receivers over those periods including the two lake drainage events |
title_full_unstemmed |
Changing position of the GPS receivers over those periods including the two lake drainage events |
title_sort |
changing position of the gps receivers over those periods including the two lake drainage events |
publisher |
IOP Publishing |
publishDate |
2013 |
url |
https://dx.doi.org/10.6084/m9.figshare.1011477.v1 https://iop.figshare.com/articles/figure/_Changing_position_of_the_GPS_receivers_over_those_periods_including_the_two_lake_drainage_events/1011477/1 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_relation |
https://dx.doi.org/10.6084/m9.figshare.1011477 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.1011477.v1 https://doi.org/10.6084/m9.figshare.1011477 |
_version_ |
1766019045618876416 |