Time series of (a) measured lake depths recorded by the pressure sensors resting on the lake bottoms and (b) estimated lakes volumes
Figure 2. Time series of (a) measured lake depths recorded by the pressure sensors resting on the lake bottoms and (b) estimated lakes volumes. Blue and red lines refer, respectively, to the Lake Half Moon (blue) and Lake Ponting (red) data. Abstract Supraglacial lake drainage on the Greenland ice s...
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ftdatacite:10.6084/m9.figshare.1011475 2023-05-15T16:29:29+02:00 Time series of (a) measured lake depths recorded by the pressure sensors resting on the lake bottoms and (b) estimated lakes volumes 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.1011475 https://iop.figshare.com/articles/figure/_Time_series_of_a_measured_lake_depths_recorded_by_the_pressure_sensors_resting_on_the_lake_bottoms_/1011475 unknown IOP Publishing 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.1011475 2021-11-05T12:55:41Z Figure 2. Time series of (a) measured lake depths recorded by the pressure sensors resting on the lake bottoms and (b) estimated lakes volumes. Blue and red lines refer, respectively, to the Lake Half Moon (blue) and Lake Ponting (red) data. 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 |
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Open Polar |
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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 Time series of (a) measured lake depths recorded by the pressure sensors resting on the lake bottoms and (b) estimated lakes volumes |
topic_facet |
Environmental Science |
description |
Figure 2. Time series of (a) measured lake depths recorded by the pressure sensors resting on the lake bottoms and (b) estimated lakes volumes. Blue and red lines refer, respectively, to the Lake Half Moon (blue) and Lake Ponting (red) data. 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 |
Time series of (a) measured lake depths recorded by the pressure sensors resting on the lake bottoms and (b) estimated lakes volumes |
title_short |
Time series of (a) measured lake depths recorded by the pressure sensors resting on the lake bottoms and (b) estimated lakes volumes |
title_full |
Time series of (a) measured lake depths recorded by the pressure sensors resting on the lake bottoms and (b) estimated lakes volumes |
title_fullStr |
Time series of (a) measured lake depths recorded by the pressure sensors resting on the lake bottoms and (b) estimated lakes volumes |
title_full_unstemmed |
Time series of (a) measured lake depths recorded by the pressure sensors resting on the lake bottoms and (b) estimated lakes volumes |
title_sort |
time series of (a) measured lake depths recorded by the pressure sensors resting on the lake bottoms and (b) estimated lakes volumes |
publisher |
IOP Publishing |
publishDate |
2013 |
url |
https://dx.doi.org/10.6084/m9.figshare.1011475 https://iop.figshare.com/articles/figure/_Time_series_of_a_measured_lake_depths_recorded_by_the_pressure_sensors_resting_on_the_lake_bottoms_/1011475 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
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.1011475 |
_version_ |
1766019188188512256 |