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Deep-sea water displacement from a turbidity current induced by the Super Typhoon Hagibis

Turbidity currents are the main drivers behind the transportation of terrestrial sediments to the deep sea, and turbidite deposits from such currents have been widely used in geological studies. Nevertheless, the contribution of turbidity currents to vertical displacement of seawater has rarely been...

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Autores principales: Kawagucci, Shinsuke, Miwa, Tetsuya, Lindsay, Dhugal J., Ogura, Eri, Yamamoto, Hiroyuki, Nishibayashi, Kenichiro, Yokooka, Hiroyuki, Nishi, Shotaro, Takahashi, Ayu, Lee, Sangkyun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: PeerJ Inc. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7733332/
https://www.ncbi.nlm.nih.gov/pubmed/33354420
http://dx.doi.org/10.7717/peerj.10429
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author Kawagucci, Shinsuke
Miwa, Tetsuya
Lindsay, Dhugal J.
Ogura, Eri
Yamamoto, Hiroyuki
Nishibayashi, Kenichiro
Yokooka, Hiroyuki
Nishi, Shotaro
Takahashi, Ayu
Lee, Sangkyun
author_facet Kawagucci, Shinsuke
Miwa, Tetsuya
Lindsay, Dhugal J.
Ogura, Eri
Yamamoto, Hiroyuki
Nishibayashi, Kenichiro
Yokooka, Hiroyuki
Nishi, Shotaro
Takahashi, Ayu
Lee, Sangkyun
author_sort Kawagucci, Shinsuke
collection PubMed
description Turbidity currents are the main drivers behind the transportation of terrestrial sediments to the deep sea, and turbidite deposits from such currents have been widely used in geological studies. Nevertheless, the contribution of turbidity currents to vertical displacement of seawater has rarely been discussed. This is partly because until recently, deep-sea turbidity currents have rarely been observed due to their unpredictable nature, being usually triggered by meteorological or geological events such as typhoons and earthquakes. Here, we report a direct observation of a deep-sea turbidity current using the recently developed Edokko Mark 1 monitoring system deployed in 2019 at a depth of 1,370 m in Suruga Bay, central Japan. A turbidity current occurred two days after its probable cause, the Super Typhoon Hagibis (2019), passed through Suruga Bay causing devastating damage. Over aperiod of 40 hours, we observed increased turbidity with turbulent conditions confirmed by a video camera. The turbidity exhibited two sharp peaks around 3:00 and 11:00 on October 14 (Japan Standard Time). The temperature and salinity characteristics during these high turbidity events agreed with independent measurements for shallow water layers in Suruga Bay at the same time, strongly suggesting that the turbidity current caused vertical displacement in the bay’s water column by transporting warmer and shallower waters downslope of the canyon. Our results add to the previous few examples that show meteorological and geological events may have significant contributions in the transportation of shallower seawater to the deep sea. Recent technological developments pertaining to the Edokko Mark 1 and similar devices enable straightforward, long-term monitoring of the deep-seafloor and will contribute to the understanding of similar spontaneous events in the deep ocean.
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spelling pubmed-77333322020-12-21 Deep-sea water displacement from a turbidity current induced by the Super Typhoon Hagibis Kawagucci, Shinsuke Miwa, Tetsuya Lindsay, Dhugal J. Ogura, Eri Yamamoto, Hiroyuki Nishibayashi, Kenichiro Yokooka, Hiroyuki Nishi, Shotaro Takahashi, Ayu Lee, Sangkyun PeerJ Aquatic and Marine Chemistry Turbidity currents are the main drivers behind the transportation of terrestrial sediments to the deep sea, and turbidite deposits from such currents have been widely used in geological studies. Nevertheless, the contribution of turbidity currents to vertical displacement of seawater has rarely been discussed. This is partly because until recently, deep-sea turbidity currents have rarely been observed due to their unpredictable nature, being usually triggered by meteorological or geological events such as typhoons and earthquakes. Here, we report a direct observation of a deep-sea turbidity current using the recently developed Edokko Mark 1 monitoring system deployed in 2019 at a depth of 1,370 m in Suruga Bay, central Japan. A turbidity current occurred two days after its probable cause, the Super Typhoon Hagibis (2019), passed through Suruga Bay causing devastating damage. Over aperiod of 40 hours, we observed increased turbidity with turbulent conditions confirmed by a video camera. The turbidity exhibited two sharp peaks around 3:00 and 11:00 on October 14 (Japan Standard Time). The temperature and salinity characteristics during these high turbidity events agreed with independent measurements for shallow water layers in Suruga Bay at the same time, strongly suggesting that the turbidity current caused vertical displacement in the bay’s water column by transporting warmer and shallower waters downslope of the canyon. Our results add to the previous few examples that show meteorological and geological events may have significant contributions in the transportation of shallower seawater to the deep sea. Recent technological developments pertaining to the Edokko Mark 1 and similar devices enable straightforward, long-term monitoring of the deep-seafloor and will contribute to the understanding of similar spontaneous events in the deep ocean. PeerJ Inc. 2020-12-09 /pmc/articles/PMC7733332/ /pubmed/33354420 http://dx.doi.org/10.7717/peerj.10429 Text en ©2020 Kawagucci et al. https://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.
spellingShingle Aquatic and Marine Chemistry
Kawagucci, Shinsuke
Miwa, Tetsuya
Lindsay, Dhugal J.
Ogura, Eri
Yamamoto, Hiroyuki
Nishibayashi, Kenichiro
Yokooka, Hiroyuki
Nishi, Shotaro
Takahashi, Ayu
Lee, Sangkyun
Deep-sea water displacement from a turbidity current induced by the Super Typhoon Hagibis
title Deep-sea water displacement from a turbidity current induced by the Super Typhoon Hagibis
title_full Deep-sea water displacement from a turbidity current induced by the Super Typhoon Hagibis
title_fullStr Deep-sea water displacement from a turbidity current induced by the Super Typhoon Hagibis
title_full_unstemmed Deep-sea water displacement from a turbidity current induced by the Super Typhoon Hagibis
title_short Deep-sea water displacement from a turbidity current induced by the Super Typhoon Hagibis
title_sort deep-sea water displacement from a turbidity current induced by the super typhoon hagibis
topic Aquatic and Marine Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7733332/
https://www.ncbi.nlm.nih.gov/pubmed/33354420
http://dx.doi.org/10.7717/peerj.10429
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