Using acoustic travel time to monitor the heat variability of glacial Fjords
Author Posting. © American Meteorological Society, 2021. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of the Atmospheric and Oceanic Technology 38(9), (2021): 1535–1550, https://...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/28993 2023-05-15T16:30:01+02:00 Using acoustic travel time to monitor the heat variability of glacial Fjords Sanchez, Robert Straneo, Fiamma Andres, Magdalena 2021-09-01 https://hdl.handle.net/1912/28993 unknown American Meteorological Society https://doi.org/10.1175/JTECH-D-20-0176.s1 Sanchez, R., Straneo, F., & Andres, M. (2021). Using acoustic travel time to monitor the heat variability of glacial Fjords. Journal of Atmospheric and Oceanic Technology, 38(9), 1535–1550. https://hdl.handle.net/1912/28993 doi:10.1175/JTECH-D-20-0176.s1 Sanchez, R., Straneo, F., & Andres, M. (2021). Using acoustic travel time to monitor the heat variability of glacial Fjords. Journal of Atmospheric and Oceanic Technology, 38(9), 1535–1550. doi:10.1175/JTECH-D-20-0176.s1 Glaciers Ice sheets Acoustic measurements/effects In situ oceanic observations Article 2021 ftwhoas https://doi.org/10.1175/JTECH-D-20-0176.s1 2022-06-11T22:56:44Z Author Posting. © American Meteorological Society, 2021. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of the Atmospheric and Oceanic Technology 38(9), (2021): 1535–1550, https://doi.org/10.1175/JTECH-D-20-0176.s1. Monitoring the heat content variability of glacial fjords is crucial to understanding the effects of oceanic forcing on marine-terminating glaciers. A pressure-sensor-equipped inverted echo sounder (PIES) was deployed midfjord in Sermilik Fjord in southeast Greenland from August 2011 to September 2012 alongside a moored array of instruments recording temperature, conductivity, and velocity. Historical hydrography is used to quantify the relationship between acoustic travel time and the vertically averaged heat content, and a new method is developed for filtering acoustic return echoes in an ice-influenced environment. We show that PIES measurements, combined with a knowledge of the fjord’s two-layer density structure, can be used to reconstruct the thickness and temperature of the inflowing water. Additionally, we find that fjord–shelf exchange events are identifiable in the travel time record implying the PIES can be used to monitor fjord circulation. Finally, we show that PIES data can be combined with moored temperature records to derive the heat content of the upper layer of the fjord where moored instruments are at great risk of being damaged by transiting icebergs. FS and MA acknowledge funding from the Kerr Family Foundation and the Grossman Family Foundation through the Woods Hole Oceanographic Institution. MA is supported by a grant from the National Science Foundation Office of Polar Programs (1332911). FS and RS acknowledge support from NSF OCE-1657601 and from the Heising-Simons Foundation. Article in Journal/Newspaper Greenland National Science Foundation Office of Polar Programs Sermilik Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Greenland Kerr ENVELOPE(65.633,65.633,-70.433,-70.433) |
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Open Polar |
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Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
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ftwhoas |
language |
unknown |
topic |
Glaciers Ice sheets Acoustic measurements/effects In situ oceanic observations |
spellingShingle |
Glaciers Ice sheets Acoustic measurements/effects In situ oceanic observations Sanchez, Robert Straneo, Fiamma Andres, Magdalena Using acoustic travel time to monitor the heat variability of glacial Fjords |
topic_facet |
Glaciers Ice sheets Acoustic measurements/effects In situ oceanic observations |
description |
Author Posting. © American Meteorological Society, 2021. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of the Atmospheric and Oceanic Technology 38(9), (2021): 1535–1550, https://doi.org/10.1175/JTECH-D-20-0176.s1. Monitoring the heat content variability of glacial fjords is crucial to understanding the effects of oceanic forcing on marine-terminating glaciers. A pressure-sensor-equipped inverted echo sounder (PIES) was deployed midfjord in Sermilik Fjord in southeast Greenland from August 2011 to September 2012 alongside a moored array of instruments recording temperature, conductivity, and velocity. Historical hydrography is used to quantify the relationship between acoustic travel time and the vertically averaged heat content, and a new method is developed for filtering acoustic return echoes in an ice-influenced environment. We show that PIES measurements, combined with a knowledge of the fjord’s two-layer density structure, can be used to reconstruct the thickness and temperature of the inflowing water. Additionally, we find that fjord–shelf exchange events are identifiable in the travel time record implying the PIES can be used to monitor fjord circulation. Finally, we show that PIES data can be combined with moored temperature records to derive the heat content of the upper layer of the fjord where moored instruments are at great risk of being damaged by transiting icebergs. FS and MA acknowledge funding from the Kerr Family Foundation and the Grossman Family Foundation through the Woods Hole Oceanographic Institution. MA is supported by a grant from the National Science Foundation Office of Polar Programs (1332911). FS and RS acknowledge support from NSF OCE-1657601 and from the Heising-Simons Foundation. |
format |
Article in Journal/Newspaper |
author |
Sanchez, Robert Straneo, Fiamma Andres, Magdalena |
author_facet |
Sanchez, Robert Straneo, Fiamma Andres, Magdalena |
author_sort |
Sanchez, Robert |
title |
Using acoustic travel time to monitor the heat variability of glacial Fjords |
title_short |
Using acoustic travel time to monitor the heat variability of glacial Fjords |
title_full |
Using acoustic travel time to monitor the heat variability of glacial Fjords |
title_fullStr |
Using acoustic travel time to monitor the heat variability of glacial Fjords |
title_full_unstemmed |
Using acoustic travel time to monitor the heat variability of glacial Fjords |
title_sort |
using acoustic travel time to monitor the heat variability of glacial fjords |
publisher |
American Meteorological Society |
publishDate |
2021 |
url |
https://hdl.handle.net/1912/28993 |
long_lat |
ENVELOPE(65.633,65.633,-70.433,-70.433) |
geographic |
Greenland Kerr |
geographic_facet |
Greenland Kerr |
genre |
Greenland National Science Foundation Office of Polar Programs Sermilik |
genre_facet |
Greenland National Science Foundation Office of Polar Programs Sermilik |
op_source |
Sanchez, R., Straneo, F., & Andres, M. (2021). Using acoustic travel time to monitor the heat variability of glacial Fjords. Journal of Atmospheric and Oceanic Technology, 38(9), 1535–1550. doi:10.1175/JTECH-D-20-0176.s1 |
op_relation |
https://doi.org/10.1175/JTECH-D-20-0176.s1 Sanchez, R., Straneo, F., & Andres, M. (2021). Using acoustic travel time to monitor the heat variability of glacial Fjords. Journal of Atmospheric and Oceanic Technology, 38(9), 1535–1550. https://hdl.handle.net/1912/28993 doi:10.1175/JTECH-D-20-0176.s1 |
op_doi |
https://doi.org/10.1175/JTECH-D-20-0176.s1 |
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1766019737879314432 |