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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Copernicus Publications
2016
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fttriple:oai:gotriple.eu:oai:doaj.org/article:f7c4f6a16d4345ae9f3548a101d21369 2023-05-15T16:21:29+02:00 Linking glacially modified waters to catchment-scale subglacial discharge using autonomous underwater vehicle observations L. A. Stevens F. Straneo S. B. Das A. J. Plueddemann A. L. Kukulya M. Morlighem 2016-02-01 https://doi.org/10.5194/tc-10-417-2016 http://www.the-cryosphere.net/10/417/2016/tc-10-417-2016.pdf https://doaj.org/article/f7c4f6a16d4345ae9f3548a101d21369 en eng Copernicus Publications 1994-0416 1994-0424 doi:10.5194/tc-10-417-2016 http://www.the-cryosphere.net/10/417/2016/tc-10-417-2016.pdf https://doaj.org/article/f7c4f6a16d4345ae9f3548a101d21369 undefined The Cryosphere, Vol 10, Iss 1, Pp 417-432 (2016) envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2016 fttriple https://doi.org/10.5194/tc-10-417-2016 2023-01-22T19:33:47Z 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. Article in Journal/Newspaper glacier Greenland The Cryosphere Unknown Greenland Sarqardleq ENVELOPE(-53.100,-53.100,68.233,68.233) The Cryosphere 10 1 417 432 |
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language |
English |
topic |
envir geo |
spellingShingle |
envir geo L. A. Stevens F. Straneo S. B. Das A. J. Plueddemann A. L. Kukulya M. Morlighem Linking glacially modified waters to catchment-scale subglacial discharge using autonomous underwater vehicle observations |
topic_facet |
envir geo |
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 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. |
format |
Article in Journal/Newspaper |
author |
L. A. Stevens F. Straneo S. B. Das A. J. Plueddemann A. L. Kukulya M. Morlighem |
author_facet |
L. A. Stevens F. Straneo S. B. Das A. J. Plueddemann A. L. Kukulya M. Morlighem |
author_sort |
L. A. Stevens |
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 |
publishDate |
2016 |
url |
https://doi.org/10.5194/tc-10-417-2016 http://www.the-cryosphere.net/10/417/2016/tc-10-417-2016.pdf https://doaj.org/article/f7c4f6a16d4345ae9f3548a101d21369 |
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, Pp 417-432 (2016) |
op_relation |
1994-0416 1994-0424 doi:10.5194/tc-10-417-2016 http://www.the-cryosphere.net/10/417/2016/tc-10-417-2016.pdf https://doaj.org/article/f7c4f6a16d4345ae9f3548a101d21369 |
op_rights |
undefined |
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 |
_version_ |
1766009497199837184 |