Linking glacially modified waters to catchment-scale subglacial discharge using autonomous underwater vehicle observations
Measurements of near-ice ( <200 m) hydrography and near-terminus subglacial hydrology are lacking, due in large part to the difficulty in working at the margin of calving glaciers. Here we pair detailed hydrographic and bathymetric measurements collected with an autonomous underwater vehicle as c...
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ftcdlib:oai:escholarship.org:ark:/13030/qt7x61g38x 2023-10-01T03:56:09+02:00 Linking glacially modified waters to catchment-scale subglacial discharge using autonomous underwater vehicle observations Stevens, Laura A Straneo, Fiamma Das, Sarah B Plueddemann, Albert J Kukulya, Amy L Morlighem, Mathieu 417 - 432 2016-01-01 application/pdf https://escholarship.org/uc/item/7x61g38x unknown eScholarship, University of California qt7x61g38x https://escholarship.org/uc/item/7x61g38x public The Cryosphere, vol 10, iss 1 Life Below Water Oceanography Physical Geography and Environmental Geoscience Meteorology & Atmospheric Sciences article 2016 ftcdlib 2023-09-04T18:04:46Z Measurements of near-ice ( <200 m) hydrography and near-terminus subglacial hydrology are lacking, due in large part to the difficulty in working at the margin of calving glaciers. Here we pair detailed hydrographic and bathymetric measurements collected with an autonomous underwater vehicle as close as 150m from the ice-ocean interface of the Saqqarliup sermia-Sarqardleq Fjord system,West Greenland, with modeled and observed subglacial discharge locations and magnitudes. We find evidence of two main types of subsurface glacially modified water (GMW) with distinct properties and locations. The two GMW locations also align with modeled runoff discharged at separate locations along the grounded margin corresponding with two prominent subcatchments beneath Saqqarliup sermia. Thus, near-ice observations and subglacial discharge routing indicate that runoff from this glacier occurs primarily at two discrete locations and gives rise to two distinct glacially modified waters. Furthermore, we show that the location with the largest subglacial discharge is associated with the lighter, fresher glacially modified water mass. This is qualitatively consistent with results from an idealized plume model. Article in Journal/Newspaper glacier Greenland The Cryosphere University of California: eScholarship Greenland Sarqardleq ENVELOPE(-53.100,-53.100,68.233,68.233) |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Life Below Water Oceanography Physical Geography and Environmental Geoscience Meteorology & Atmospheric Sciences |
spellingShingle |
Life Below Water Oceanography Physical Geography and Environmental Geoscience Meteorology & Atmospheric Sciences Stevens, Laura A Straneo, Fiamma Das, Sarah B Plueddemann, Albert J Kukulya, Amy L Morlighem, Mathieu Linking glacially modified waters to catchment-scale subglacial discharge using autonomous underwater vehicle observations |
topic_facet |
Life Below Water Oceanography Physical Geography and Environmental Geoscience Meteorology & Atmospheric Sciences |
description |
Measurements of near-ice ( <200 m) hydrography and near-terminus subglacial hydrology are lacking, due in large part to the difficulty in working at the margin of calving glaciers. Here we pair detailed hydrographic and bathymetric measurements collected with an autonomous underwater vehicle as close as 150m from the ice-ocean interface of the Saqqarliup sermia-Sarqardleq Fjord system,West Greenland, with modeled and observed subglacial discharge locations and magnitudes. We find evidence of two main types of subsurface glacially modified water (GMW) with distinct properties and locations. The two GMW locations also align with modeled runoff discharged at separate locations along the grounded margin corresponding with two prominent subcatchments beneath Saqqarliup sermia. Thus, near-ice observations and subglacial discharge routing indicate that runoff from this glacier occurs primarily at two discrete locations and gives rise to two distinct glacially modified waters. Furthermore, we show that the location with the largest subglacial discharge is associated with the lighter, fresher glacially modified water mass. This is qualitatively consistent with results from an idealized plume model. |
format |
Article in Journal/Newspaper |
author |
Stevens, Laura A Straneo, Fiamma Das, Sarah B Plueddemann, Albert J Kukulya, Amy L Morlighem, Mathieu |
author_facet |
Stevens, Laura A Straneo, Fiamma Das, Sarah B Plueddemann, Albert J Kukulya, Amy L Morlighem, Mathieu |
author_sort |
Stevens, Laura A |
title |
Linking glacially modified waters to catchment-scale subglacial discharge using autonomous underwater vehicle observations |
title_short |
Linking glacially modified waters to catchment-scale subglacial discharge using autonomous underwater vehicle observations |
title_full |
Linking glacially modified waters to catchment-scale subglacial discharge using autonomous underwater vehicle observations |
title_fullStr |
Linking glacially modified waters to catchment-scale subglacial discharge using autonomous underwater vehicle observations |
title_full_unstemmed |
Linking glacially modified waters to catchment-scale subglacial discharge using autonomous underwater vehicle observations |
title_sort |
linking glacially modified waters to catchment-scale subglacial discharge using autonomous underwater vehicle observations |
publisher |
eScholarship, University of California |
publishDate |
2016 |
url |
https://escholarship.org/uc/item/7x61g38x |
op_coverage |
417 - 432 |
long_lat |
ENVELOPE(-53.100,-53.100,68.233,68.233) |
geographic |
Greenland Sarqardleq |
geographic_facet |
Greenland Sarqardleq |
genre |
glacier Greenland The Cryosphere |
genre_facet |
glacier Greenland The Cryosphere |
op_source |
The Cryosphere, vol 10, iss 1 |
op_relation |
qt7x61g38x https://escholarship.org/uc/item/7x61g38x |
op_rights |
public |
_version_ |
1778525331794165760 |