Shallow-ocean methane leakage and degassing to the atmosphere: Triggered by offshore oil-gas and methane hydrate explorations
Both offshore oil-gas exploration and marine methane hydrate recovery can trigger massive CH4 release from seafloor. During upward transportation of CH4 plume through water column, CH4 is subjected to dissolution and microbial consumption despite the protection of hydrate and oil coating on bubbles...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2015-05-01
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| Series: | Frontiers in Marine Science |
| Subjects: | |
| Online Access: | http://journal.frontiersin.org/Journal/10.3389/fmars.2015.00034/full |
| _version_ | 1818250216205189120 |
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| author | Yong eZHANG Weidong eZhai |
| author_facet | Yong eZHANG Weidong eZhai |
| author_sort | Yong eZHANG |
| collection | DOAJ |
| description | Both offshore oil-gas exploration and marine methane hydrate recovery can trigger massive CH4 release from seafloor. During upward transportation of CH4 plume through water column, CH4 is subjected to dissolution and microbial consumption despite the protection of hydrate and oil coating on bubbles surface. The ultimate CH4 degassing to the atmosphere appears to be water-depth dependent. In shallow oceans with water depth less than 100 m, the natural or human-induced leakages or both lead to significant sea-to-air CH4 degassing from 3.00 to 1.36 × 105 μmol m-2 d-1. To quantify the human-perturbation induced CH4 degassing, the combination of top-down modeling and bottom-up calculations is essential due to spatial and temporal variability of diffusion and ebullition at water-air interface. |
| first_indexed | 2024-12-12T15:48:51Z |
| format | Article |
| id | doaj.art-a35c77fe3f7747f289e91c0108718022 |
| institution | Directory Open Access Journal |
| issn | 2296-7745 |
| language | English |
| last_indexed | 2024-12-12T15:48:51Z |
| publishDate | 2015-05-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Marine Science |
| spelling | doaj.art-a35c77fe3f7747f289e91c01087180222022-12-22T00:19:40ZengFrontiers Media S.A.Frontiers in Marine Science2296-77452015-05-01210.3389/fmars.2015.00034137884Shallow-ocean methane leakage and degassing to the atmosphere: Triggered by offshore oil-gas and methane hydrate explorationsYong eZHANG0Weidong eZhai1Yantai Institute of Coastal Zone Research, Chinese Academy of SciencesNational Marine Environmental Monitoring CenterBoth offshore oil-gas exploration and marine methane hydrate recovery can trigger massive CH4 release from seafloor. During upward transportation of CH4 plume through water column, CH4 is subjected to dissolution and microbial consumption despite the protection of hydrate and oil coating on bubbles surface. The ultimate CH4 degassing to the atmosphere appears to be water-depth dependent. In shallow oceans with water depth less than 100 m, the natural or human-induced leakages or both lead to significant sea-to-air CH4 degassing from 3.00 to 1.36 × 105 μmol m-2 d-1. To quantify the human-perturbation induced CH4 degassing, the combination of top-down modeling and bottom-up calculations is essential due to spatial and temporal variability of diffusion and ebullition at water-air interface.http://journal.frontiersin.org/Journal/10.3389/fmars.2015.00034/fullMethaneHydrateCoastal processOffshore oil-gas explorationseafloor leakage |
| spellingShingle | Yong eZHANG Weidong eZhai Shallow-ocean methane leakage and degassing to the atmosphere: Triggered by offshore oil-gas and methane hydrate explorations Frontiers in Marine Science Methane Hydrate Coastal process Offshore oil-gas exploration seafloor leakage |
| title | Shallow-ocean methane leakage and degassing to the atmosphere: Triggered by offshore oil-gas and methane hydrate explorations |
| title_full | Shallow-ocean methane leakage and degassing to the atmosphere: Triggered by offshore oil-gas and methane hydrate explorations |
| title_fullStr | Shallow-ocean methane leakage and degassing to the atmosphere: Triggered by offshore oil-gas and methane hydrate explorations |
| title_full_unstemmed | Shallow-ocean methane leakage and degassing to the atmosphere: Triggered by offshore oil-gas and methane hydrate explorations |
| title_short | Shallow-ocean methane leakage and degassing to the atmosphere: Triggered by offshore oil-gas and methane hydrate explorations |
| title_sort | shallow ocean methane leakage and degassing to the atmosphere triggered by offshore oil gas and methane hydrate explorations |
| topic | Methane Hydrate Coastal process Offshore oil-gas exploration seafloor leakage |
| url | http://journal.frontiersin.org/Journal/10.3389/fmars.2015.00034/full |
| work_keys_str_mv | AT yongezhang shallowoceanmethaneleakageanddegassingtotheatmospheretriggeredbyoffshoreoilgasandmethanehydrateexplorations AT weidongezhai shallowoceanmethaneleakageanddegassingtotheatmospheretriggeredbyoffshoreoilgasandmethanehydrateexplorations |