From the seep to the surface: the ascent and dissolution of methane bubbles in the ocean

Methane, as a strong greenhouse gas, has 21-25 times the warming potential per unit mass than carbon dioxide, and the methane from the oceans can contribute to ~4% of the annual atmosphere methane budget. Large methane bubble plumes have been observed in seep sites globally on shallow continental sh...

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Bibliographic Details
Main Author: Chen, Jiangzhi
Format: Report
Language:unknown
Published: arXiv 2018
Subjects:
Geophysics physics.geo-ph
FOS Physical sciences
Methane hydrate
Online Access:https://dx.doi.org/10.48550/arxiv.1802.09162
https://arxiv.org/abs/1802.09162
id ftdatacite:10.48550/arxiv.1802.09162
record_format openpolar
spelling ftdatacite:10.48550/arxiv.1802.09162 2023-05-15T17:12:05+02:00 From the seep to the surface: the ascent and dissolution of methane bubbles in the ocean Chen, Jiangzhi 2018 https://dx.doi.org/10.48550/arxiv.1802.09162 https://arxiv.org/abs/1802.09162 unknown arXiv arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ Geophysics physics.geo-ph FOS Physical sciences Preprint Article article CreativeWork 2018 ftdatacite https://doi.org/10.48550/arxiv.1802.09162 2022-04-01T09:50:52Z Methane, as a strong greenhouse gas, has 21-25 times the warming potential per unit mass than carbon dioxide, and the methane from the oceans can contribute to ~4% of the annual atmosphere methane budget. Large methane bubble plumes have been observed in seep sites globally on shallow continental shelves, and emerging industry of methane hydrates mining causes growing environmental concern on possible disastrous blowout which destabilizes the methane hydrate and releases huge amount of methane gas. To better estimate how much methane in gaseous phase leaked from the seeps can reach the atmosphere, a simplified model is developed to simulate the ascent of a methane bubble from a shallow ocean methane seep, and the methane transfer with the surrounding water. The breakup and coalescence of bubbles are neglected, and the bubble is assumed to remain spherical following a vertical path during the whole rising process. We calculated the survival distance of bubbles with varying initial sizes and depths and the remaining percentage of methane reaching the sea surface, and applied the results to the seep sites in the Shenhu area in the South China Sea. The study can provide insight into the relative significance of different water bodies in contributing to the atmosphere greenhouse gas. : 10 pages, 2 figures Report Methane hydrate DataCite Metadata Store (German National Library of Science and Technology)
institution Open Polar
collection DataCite Metadata Store (German National Library of Science and Technology)
op_collection_id ftdatacite
language unknown
topic Geophysics physics.geo-ph
FOS Physical sciences
spellingShingle Geophysics physics.geo-ph
FOS Physical sciences
Chen, Jiangzhi
From the seep to the surface: the ascent and dissolution of methane bubbles in the ocean
topic_facet Geophysics physics.geo-ph
FOS Physical sciences
description Methane, as a strong greenhouse gas, has 21-25 times the warming potential per unit mass than carbon dioxide, and the methane from the oceans can contribute to ~4% of the annual atmosphere methane budget. Large methane bubble plumes have been observed in seep sites globally on shallow continental shelves, and emerging industry of methane hydrates mining causes growing environmental concern on possible disastrous blowout which destabilizes the methane hydrate and releases huge amount of methane gas. To better estimate how much methane in gaseous phase leaked from the seeps can reach the atmosphere, a simplified model is developed to simulate the ascent of a methane bubble from a shallow ocean methane seep, and the methane transfer with the surrounding water. The breakup and coalescence of bubbles are neglected, and the bubble is assumed to remain spherical following a vertical path during the whole rising process. We calculated the survival distance of bubbles with varying initial sizes and depths and the remaining percentage of methane reaching the sea surface, and applied the results to the seep sites in the Shenhu area in the South China Sea. The study can provide insight into the relative significance of different water bodies in contributing to the atmosphere greenhouse gas. : 10 pages, 2 figures
format Report
author Chen, Jiangzhi
author_facet Chen, Jiangzhi
author_sort Chen, Jiangzhi
title From the seep to the surface: the ascent and dissolution of methane bubbles in the ocean
title_short From the seep to the surface: the ascent and dissolution of methane bubbles in the ocean
title_full From the seep to the surface: the ascent and dissolution of methane bubbles in the ocean
title_fullStr From the seep to the surface: the ascent and dissolution of methane bubbles in the ocean
title_full_unstemmed From the seep to the surface: the ascent and dissolution of methane bubbles in the ocean
title_sort from the seep to the surface: the ascent and dissolution of methane bubbles in the ocean
publisher arXiv
publishDate 2018
url https://dx.doi.org/10.48550/arxiv.1802.09162
https://arxiv.org/abs/1802.09162
genre Methane hydrate
genre_facet Methane hydrate
op_rights arXiv.org perpetual, non-exclusive license
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
op_doi https://doi.org/10.48550/arxiv.1802.09162
_version_ 1766068841774841856

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