Linking glacially modified waters to catchment-scale subglacial discharge using autonomous underwater vehicle observations
© The Author(s), 2016. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Cryosphere 10 (2016): 417-432, doi:10.5194/tc-10-417-2016. Measurements of near-ice (< 200 m) hydrography and near-terminus subglacial hydrology...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/8106 2023-05-15T15:15:21+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 2016-02-24 https://hdl.handle.net/1912/8106 en_US eng Copernicus Publications on behalf of the European Geosciences Union https://doi.org/10.5194/tc-10-417-2016 Cryosphere 10 (2016): 417-432 https://hdl.handle.net/1912/8106 doi:10.5194/tc-10-417-2016 Attribution 3.0 Unported http://creativecommons.org/licenses/by/3.0/ CC-BY Cryosphere 10 (2016): 417-432 doi:10.5194/tc-10-417-2016 Article 2016 ftwhoas https://doi.org/10.5194/tc-10-417-2016 2022-05-28T22:59:36Z © The Author(s), 2016. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Cryosphere 10 (2016): 417-432, doi:10.5194/tc-10-417-2016. 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 150 m 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. Support was provided by the National Science Foundation’s Office of Polar Programs (NSF-OPP) through PLR-1418256 to F. Straneo, S. B. Das and A. J. Plueddemann, PLR-1023364 to S. B. Das, and through the Woods Hole Oceanographic Institution Ocean and Climate Change Institute Arctic Research Initiative to F. Straneo, S. B. Das, and A. J. Plueddemann. L. A. Stevens was also supported by a National Science Foundation Graduate Research Fellowship. S. B. Das was also supported by the Woods Hole Oceanographic Institution James E. and Barbara V. Moltz Research Fellowship. M. Morlighem was supported by the National ... Article in Journal/Newspaper Arctic Climate change glacier Greenland Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Arctic Greenland Sarqardleq ENVELOPE(-53.100,-53.100,68.233,68.233) The Cryosphere 10 1 417 432 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
description |
© The Author(s), 2016. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Cryosphere 10 (2016): 417-432, doi:10.5194/tc-10-417-2016. 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 150 m 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. Support was provided by the National Science Foundation’s Office of Polar Programs (NSF-OPP) through PLR-1418256 to F. Straneo, S. B. Das and A. J. Plueddemann, PLR-1023364 to S. B. Das, and through the Woods Hole Oceanographic Institution Ocean and Climate Change Institute Arctic Research Initiative to F. Straneo, S. B. Das, and A. J. Plueddemann. L. A. Stevens was also supported by a National Science Foundation Graduate Research Fellowship. S. B. Das was also supported by the Woods Hole Oceanographic Institution James E. and Barbara V. Moltz Research Fellowship. M. Morlighem was supported by the National ... |
format |
Article in Journal/Newspaper |
author |
Stevens, Laura A. Straneo, Fiamma Das, Sarah B. Plueddemann, Albert J. Kukulya, Amy L. Morlighem, Mathieu |
spellingShingle |
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 |
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 |
Copernicus Publications on behalf of the European Geosciences Union |
publishDate |
2016 |
url |
https://hdl.handle.net/1912/8106 |
long_lat |
ENVELOPE(-53.100,-53.100,68.233,68.233) |
geographic |
Arctic Greenland Sarqardleq |
geographic_facet |
Arctic Greenland Sarqardleq |
genre |
Arctic Climate change glacier Greenland |
genre_facet |
Arctic Climate change glacier Greenland |
op_source |
Cryosphere 10 (2016): 417-432 doi:10.5194/tc-10-417-2016 |
op_relation |
https://doi.org/10.5194/tc-10-417-2016 Cryosphere 10 (2016): 417-432 https://hdl.handle.net/1912/8106 doi:10.5194/tc-10-417-2016 |
op_rights |
Attribution 3.0 Unported http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/tc-10-417-2016 |
container_title |
The Cryosphere |
container_volume |
10 |
container_issue |
1 |
container_start_page |
417 |
op_container_end_page |
432 |
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1766345718597943296 |