Hydrate formation on marine seep bubbles and the implications for water column methane dissolution
© The Author(s), 2021. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Fu, X., Waite, W. F., & Ruppel, C. D. Hydrate formation on marine seep bubbles and the implications for water column methane dissolution. Journa...
Published in: | Journal of Geophysical Research: Oceans |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
American Geophysical Union
2021
|
Subjects: | |
Online Access: | https://hdl.handle.net/1912/27810 |
id |
ftwhoas:oai:darchive.mblwhoilibrary.org:1912/27810 |
---|---|
record_format |
openpolar |
spelling |
ftwhoas:oai:darchive.mblwhoilibrary.org:1912/27810 2023-05-15T17:12:12+02:00 Hydrate formation on marine seep bubbles and the implications for water column methane dissolution Fu, Xiaojing Waite, William F. Ruppel, Carolyn D. 2021-09-01 https://hdl.handle.net/1912/27810 unknown American Geophysical Union https://doi.org/10.1029/2021JC017363 Fu, X., Waite, W. F., & Ruppel, C. D. (2021). Hydrate formation on marine seep bubbles and the implications for water column methane dissolution. Journal of Geophysical Research: Oceans, 126(9), e2021JC017363. https://hdl.handle.net/1912/27810 doi:10.1029/2021JC017363 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ CC-BY Fu, X., Waite, W. F., & Ruppel, C. D. (2021). Hydrate formation on marine seep bubbles and the implications for water column methane dissolution. Journal of Geophysical Research: Oceans, 126(9), e2021JC017363. doi:10.1029/2021JC017363 Gas and hydrate systems Oceanography: biological and chemical Carbon cycling Biogeochemical cycles processes and modeling Article 2021 ftwhoas https://doi.org/10.1029/2021JC017363 2022-10-29T22:57:24Z © The Author(s), 2021. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Fu, X., Waite, W. F., & Ruppel, C. D. Hydrate formation on marine seep bubbles and the implications for water column methane dissolution. Journal of Geophysical Research: Oceans, 126(9), (2021): e2021JC017363, https://doi.org/10.1029/2021JC017363. Methane released from seafloor seeps contributes to a number of benthic, water column, and atmospheric processes. At seafloor seeps within the methane hydrate stability zone, crystalline gas hydrate shells can form on methane bubbles while the bubbles are still in contact with the seafloor or as the bubbles begin ascending through the water column. These shells reduce methane dissolution rates, allowing hydrate-coated bubbles to deliver methane to shallower depths in the water column than hydrate-free bubbles. Here, we analyze seafloor videos from six deepwater seep sites associated with a diverse range of bubble-release processes involving hydrate formation. Bubbles that grow rapidly are often hydrate-free when released from the seafloor. As bubble growth slows and seafloor residence time increases, a hydrate coating can form on the bubble's gas-water interface, fully coating most bubbles within ∼10 s of the onset of hydrate formation at the seafloor. This finding agrees with water-column observations that most bubbles become hydrate-coated after their initial ∼150 cm of rise, which takes about 10 s. Whether a bubble is coated or not at the seafloor affects how much methane a bubble contains and how quickly that methane dissolves during the bubble's rise through the water column. A simplified model shows that, after rising 150 cm above the seafloor, a bubble that grew a hydrate shell before releasing from the seafloor will have ∼5% more methane than a bubble of initial equal volume that did not grow a hydrate shell after it traveled to the same height. X. Fu acknowledges support from the Miller Fellowship ... Article in Journal/Newspaper Methane hydrate Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Journal of Geophysical Research: Oceans 126 9 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
unknown |
topic |
Gas and hydrate systems Oceanography: biological and chemical Carbon cycling Biogeochemical cycles processes and modeling |
spellingShingle |
Gas and hydrate systems Oceanography: biological and chemical Carbon cycling Biogeochemical cycles processes and modeling Fu, Xiaojing Waite, William F. Ruppel, Carolyn D. Hydrate formation on marine seep bubbles and the implications for water column methane dissolution |
topic_facet |
Gas and hydrate systems Oceanography: biological and chemical Carbon cycling Biogeochemical cycles processes and modeling |
description |
© The Author(s), 2021. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Fu, X., Waite, W. F., & Ruppel, C. D. Hydrate formation on marine seep bubbles and the implications for water column methane dissolution. Journal of Geophysical Research: Oceans, 126(9), (2021): e2021JC017363, https://doi.org/10.1029/2021JC017363. Methane released from seafloor seeps contributes to a number of benthic, water column, and atmospheric processes. At seafloor seeps within the methane hydrate stability zone, crystalline gas hydrate shells can form on methane bubbles while the bubbles are still in contact with the seafloor or as the bubbles begin ascending through the water column. These shells reduce methane dissolution rates, allowing hydrate-coated bubbles to deliver methane to shallower depths in the water column than hydrate-free bubbles. Here, we analyze seafloor videos from six deepwater seep sites associated with a diverse range of bubble-release processes involving hydrate formation. Bubbles that grow rapidly are often hydrate-free when released from the seafloor. As bubble growth slows and seafloor residence time increases, a hydrate coating can form on the bubble's gas-water interface, fully coating most bubbles within ∼10 s of the onset of hydrate formation at the seafloor. This finding agrees with water-column observations that most bubbles become hydrate-coated after their initial ∼150 cm of rise, which takes about 10 s. Whether a bubble is coated or not at the seafloor affects how much methane a bubble contains and how quickly that methane dissolves during the bubble's rise through the water column. A simplified model shows that, after rising 150 cm above the seafloor, a bubble that grew a hydrate shell before releasing from the seafloor will have ∼5% more methane than a bubble of initial equal volume that did not grow a hydrate shell after it traveled to the same height. X. Fu acknowledges support from the Miller Fellowship ... |
format |
Article in Journal/Newspaper |
author |
Fu, Xiaojing Waite, William F. Ruppel, Carolyn D. |
author_facet |
Fu, Xiaojing Waite, William F. Ruppel, Carolyn D. |
author_sort |
Fu, Xiaojing |
title |
Hydrate formation on marine seep bubbles and the implications for water column methane dissolution |
title_short |
Hydrate formation on marine seep bubbles and the implications for water column methane dissolution |
title_full |
Hydrate formation on marine seep bubbles and the implications for water column methane dissolution |
title_fullStr |
Hydrate formation on marine seep bubbles and the implications for water column methane dissolution |
title_full_unstemmed |
Hydrate formation on marine seep bubbles and the implications for water column methane dissolution |
title_sort |
hydrate formation on marine seep bubbles and the implications for water column methane dissolution |
publisher |
American Geophysical Union |
publishDate |
2021 |
url |
https://hdl.handle.net/1912/27810 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_source |
Fu, X., Waite, W. F., & Ruppel, C. D. (2021). Hydrate formation on marine seep bubbles and the implications for water column methane dissolution. Journal of Geophysical Research: Oceans, 126(9), e2021JC017363. doi:10.1029/2021JC017363 |
op_relation |
https://doi.org/10.1029/2021JC017363 Fu, X., Waite, W. F., & Ruppel, C. D. (2021). Hydrate formation on marine seep bubbles and the implications for water column methane dissolution. Journal of Geophysical Research: Oceans, 126(9), e2021JC017363. https://hdl.handle.net/1912/27810 doi:10.1029/2021JC017363 |
op_rights |
Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1029/2021JC017363 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
126 |
container_issue |
9 |
_version_ |
1766068993568800768 |