Impact of periodic intermediary flows on submarine melting of a Greenland glacier
Author Posting. © American Geophysical Union, 2014. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Oceans 119 (2014): 7078–7098, doi:10.1002/2014JC009953. The s...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/7019 2023-05-15T16:21:06+02:00 Impact of periodic intermediary flows on submarine melting of a Greenland glacier Sciascia, R. Cenedese, Claudia Nicolì, D. Heimbach, Patrick Straneo, Fiamma 2014-10-24 application/pdf https://hdl.handle.net/1912/7019 en_US eng John Wiley & Sons https://doi.org/10.1002/2014JC009953 Journal of Geophysical Research: Oceans 119 (2014): 7078–7098 https://hdl.handle.net/1912/7019 doi:10.1002/2014JC009953 Journal of Geophysical Research: Oceans 119 (2014): 7078–7098 doi:10.1002/2014JC009953 Fjord dynamics Ice-ocean modeling Glacier melting Numerical model Laboratory experiment Article 2014 ftwhoas https://doi.org/10.1002/2014JC009953 2022-05-28T22:59:14Z Author Posting. © American Geophysical Union, 2014. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Oceans 119 (2014): 7078–7098, doi:10.1002/2014JC009953. The submarine melting of a vertical glacier front, induced by an intermediary circulation forced by periodic density variations at the mouth of a fjord, is investigated using a nonhydrostatic ocean general circulation model and idealized laboratory experiments. The idealized configurations broadly match that of Sermilik Fjord, southeast Greenland, a largely two layers system characterized by strong seasonal variability of subglacial discharge. Consistent with observations, the numerical results suggest that the intermediary circulation is an effective mechanism for the advection of shelf anomalies inside the fjord. In the numerical simulations, the advection mechanism is a density intrusion with a velocity which is an order of magnitude larger than the velocities associated with a glacier-driven circulation. In summer, submarine melting is mostly influenced by the discharge of surface runoff at the base of the glacier and the intermediary circulation induces small changes in submarine melting. In winter, on the other hand, submarine melting depends only on the water properties and velocity distribution at the glacier front. Hence, the properties of the waters advected by the intermediary circulation to the glacier front are found to be the primary control of the submarine melting. When the density of the intrusion is intermediate between those found in the fjord's two layers, there is a significant reduction in submarine melting. On the other hand, when the density is close to that of the bottom layer, only a slight reduction in submarine melting is observed. The numerical results compare favorably to idealized laboratory experiments with a similar setup. Support to C. Cenedese and F. Straneo was given by the National ... Article in Journal/Newspaper glacier Greenland Sermilik Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Greenland Journal of Geophysical Research: Oceans 119 10 7078 7098 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Fjord dynamics Ice-ocean modeling Glacier melting Numerical model Laboratory experiment |
spellingShingle |
Fjord dynamics Ice-ocean modeling Glacier melting Numerical model Laboratory experiment Sciascia, R. Cenedese, Claudia Nicolì, D. Heimbach, Patrick Straneo, Fiamma Impact of periodic intermediary flows on submarine melting of a Greenland glacier |
topic_facet |
Fjord dynamics Ice-ocean modeling Glacier melting Numerical model Laboratory experiment |
description |
Author Posting. © American Geophysical Union, 2014. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Oceans 119 (2014): 7078–7098, doi:10.1002/2014JC009953. The submarine melting of a vertical glacier front, induced by an intermediary circulation forced by periodic density variations at the mouth of a fjord, is investigated using a nonhydrostatic ocean general circulation model and idealized laboratory experiments. The idealized configurations broadly match that of Sermilik Fjord, southeast Greenland, a largely two layers system characterized by strong seasonal variability of subglacial discharge. Consistent with observations, the numerical results suggest that the intermediary circulation is an effective mechanism for the advection of shelf anomalies inside the fjord. In the numerical simulations, the advection mechanism is a density intrusion with a velocity which is an order of magnitude larger than the velocities associated with a glacier-driven circulation. In summer, submarine melting is mostly influenced by the discharge of surface runoff at the base of the glacier and the intermediary circulation induces small changes in submarine melting. In winter, on the other hand, submarine melting depends only on the water properties and velocity distribution at the glacier front. Hence, the properties of the waters advected by the intermediary circulation to the glacier front are found to be the primary control of the submarine melting. When the density of the intrusion is intermediate between those found in the fjord's two layers, there is a significant reduction in submarine melting. On the other hand, when the density is close to that of the bottom layer, only a slight reduction in submarine melting is observed. The numerical results compare favorably to idealized laboratory experiments with a similar setup. Support to C. Cenedese and F. Straneo was given by the National ... |
format |
Article in Journal/Newspaper |
author |
Sciascia, R. Cenedese, Claudia Nicolì, D. Heimbach, Patrick Straneo, Fiamma |
author_facet |
Sciascia, R. Cenedese, Claudia Nicolì, D. Heimbach, Patrick Straneo, Fiamma |
author_sort |
Sciascia, R. |
title |
Impact of periodic intermediary flows on submarine melting of a Greenland glacier |
title_short |
Impact of periodic intermediary flows on submarine melting of a Greenland glacier |
title_full |
Impact of periodic intermediary flows on submarine melting of a Greenland glacier |
title_fullStr |
Impact of periodic intermediary flows on submarine melting of a Greenland glacier |
title_full_unstemmed |
Impact of periodic intermediary flows on submarine melting of a Greenland glacier |
title_sort |
impact of periodic intermediary flows on submarine melting of a greenland glacier |
publisher |
John Wiley & Sons |
publishDate |
2014 |
url |
https://hdl.handle.net/1912/7019 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
glacier Greenland Sermilik |
genre_facet |
glacier Greenland Sermilik |
op_source |
Journal of Geophysical Research: Oceans 119 (2014): 7078–7098 doi:10.1002/2014JC009953 |
op_relation |
https://doi.org/10.1002/2014JC009953 Journal of Geophysical Research: Oceans 119 (2014): 7078–7098 https://hdl.handle.net/1912/7019 doi:10.1002/2014JC009953 |
op_doi |
https://doi.org/10.1002/2014JC009953 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
119 |
container_issue |
10 |
container_start_page |
7078 |
op_container_end_page |
7098 |
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1766009123207380992 |