The challenges of quantifying the carbon stored in Arctic marine gas hydrate
7 pages, 2 figures, 2 tables The quantification of the carbon stored in gas hydrate (GH) bearing marine sediments still remains a challenge. Despite recent efforts to develop approaches to better estimate the GH inventory globally, these estimates are still highly unconstrained due to insufficient f...
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Online Access: | http://hdl.handle.net/10261/133126 https://doi.org/10.1016/j.marpetgeo.2015.11.014 https://doi.org/10.13039/501100000780 |
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ftcsic:oai:digital.csic.es:10261/133126 2024-02-11T10:00:42+01:00 The challenges of quantifying the carbon stored in Arctic marine gas hydrate Marín-Moreno, Héctor Giustiniani, Michela Tinivella, Umberta Piñero, Elena European Commission 2016-03 http://hdl.handle.net/10261/133126 https://doi.org/10.1016/j.marpetgeo.2015.11.014 https://doi.org/10.13039/501100000780 unknown Elsevier https://dx.doi.org/10.1016/j.marpetgeo.2015.11.014 Sí doi:10.1016/j.marpetgeo.2015.11.014 issn: 0264-8172 e-issn: 1873-4073 Marine and Petroleum Geology 71: 76-82 (2016) http://hdl.handle.net/10261/133126 http://dx.doi.org/10.13039/501100000780 open Gas hydrate inventory Uncertainty Ocean warming Arctic Carbon-rich fluids artículo http://purl.org/coar/resource_type/c_6501 2016 ftcsic https://doi.org/10.1016/j.marpetgeo.2015.11.01410.13039/501100000780 2024-01-16T10:15:42Z 7 pages, 2 figures, 2 tables The quantification of the carbon stored in gas hydrate (GH) bearing marine sediments still remains a challenge. Despite recent efforts to develop approaches to better estimate the GH inventory globally, these estimates are still highly unconstrained due to insufficient field data and poor understanding of the mechanisms fuelling the GH stability zone (GHSZ). Here we use geophysically-derived GH saturations to constraint estimates of model-derived Arctic marine GH inventory at present. We also estimate the potential carbon released from GH dissociation under a seabed warming of 2 °C over 100 yr. We estimate an inventory ranging between 0.28 and 541 Gt of carbon, which upper bound results in average GH saturations of 0.25%. Our upper bound is mainly controlled by our imposed upwards carbon-rich fluid flow of 0.01 cm yr and it is five times greater than the most recent estimate that only considers in-situ degradation of particulate organic carbon (POC). To obtain the seismically-inferred GH saturations of 5-10% offshore west of Svalbard and in the Beaufort Sea, an upwards advection of carbon-rich fluids equivalent to 0.02-0.04 cm yr is required. This mechanism may be the most important source of carbon reaching the GHSZ in Arctic marine sediments. A 2 °C seabed temperature increase over 100 yr may reduce the GH inventory by about 88.44% (0.7 Gt C) if POC is the only source, and by about 5.4% (29.7 Gt C) if the main source of carbon is the upwards advection of carbon-rich fluids This work was partly supported by the European Social Fund, Operational Programme 2007–2013, Objective 2 Regional Competitiveness and Employment, Axis 5 Transnational cooperation, TALENTS FVG Programme (Friuli Venezia Giulia) Peer Reviewed Article in Journal/Newspaper Arctic Beaufort Sea Svalbard Digital.CSIC (Spanish National Research Council) Arctic Svalbard Marine and Petroleum Geology 71 76 82 |
institution |
Open Polar |
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Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
unknown |
topic |
Gas hydrate inventory Uncertainty Ocean warming Arctic Carbon-rich fluids |
spellingShingle |
Gas hydrate inventory Uncertainty Ocean warming Arctic Carbon-rich fluids Marín-Moreno, Héctor Giustiniani, Michela Tinivella, Umberta Piñero, Elena The challenges of quantifying the carbon stored in Arctic marine gas hydrate |
topic_facet |
Gas hydrate inventory Uncertainty Ocean warming Arctic Carbon-rich fluids |
description |
7 pages, 2 figures, 2 tables The quantification of the carbon stored in gas hydrate (GH) bearing marine sediments still remains a challenge. Despite recent efforts to develop approaches to better estimate the GH inventory globally, these estimates are still highly unconstrained due to insufficient field data and poor understanding of the mechanisms fuelling the GH stability zone (GHSZ). Here we use geophysically-derived GH saturations to constraint estimates of model-derived Arctic marine GH inventory at present. We also estimate the potential carbon released from GH dissociation under a seabed warming of 2 °C over 100 yr. We estimate an inventory ranging between 0.28 and 541 Gt of carbon, which upper bound results in average GH saturations of 0.25%. Our upper bound is mainly controlled by our imposed upwards carbon-rich fluid flow of 0.01 cm yr and it is five times greater than the most recent estimate that only considers in-situ degradation of particulate organic carbon (POC). To obtain the seismically-inferred GH saturations of 5-10% offshore west of Svalbard and in the Beaufort Sea, an upwards advection of carbon-rich fluids equivalent to 0.02-0.04 cm yr is required. This mechanism may be the most important source of carbon reaching the GHSZ in Arctic marine sediments. A 2 °C seabed temperature increase over 100 yr may reduce the GH inventory by about 88.44% (0.7 Gt C) if POC is the only source, and by about 5.4% (29.7 Gt C) if the main source of carbon is the upwards advection of carbon-rich fluids This work was partly supported by the European Social Fund, Operational Programme 2007–2013, Objective 2 Regional Competitiveness and Employment, Axis 5 Transnational cooperation, TALENTS FVG Programme (Friuli Venezia Giulia) Peer Reviewed |
author2 |
European Commission |
format |
Article in Journal/Newspaper |
author |
Marín-Moreno, Héctor Giustiniani, Michela Tinivella, Umberta Piñero, Elena |
author_facet |
Marín-Moreno, Héctor Giustiniani, Michela Tinivella, Umberta Piñero, Elena |
author_sort |
Marín-Moreno, Héctor |
title |
The challenges of quantifying the carbon stored in Arctic marine gas hydrate |
title_short |
The challenges of quantifying the carbon stored in Arctic marine gas hydrate |
title_full |
The challenges of quantifying the carbon stored in Arctic marine gas hydrate |
title_fullStr |
The challenges of quantifying the carbon stored in Arctic marine gas hydrate |
title_full_unstemmed |
The challenges of quantifying the carbon stored in Arctic marine gas hydrate |
title_sort |
challenges of quantifying the carbon stored in arctic marine gas hydrate |
publisher |
Elsevier |
publishDate |
2016 |
url |
http://hdl.handle.net/10261/133126 https://doi.org/10.1016/j.marpetgeo.2015.11.014 https://doi.org/10.13039/501100000780 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Beaufort Sea Svalbard |
genre_facet |
Arctic Beaufort Sea Svalbard |
op_relation |
https://dx.doi.org/10.1016/j.marpetgeo.2015.11.014 Sí doi:10.1016/j.marpetgeo.2015.11.014 issn: 0264-8172 e-issn: 1873-4073 Marine and Petroleum Geology 71: 76-82 (2016) http://hdl.handle.net/10261/133126 http://dx.doi.org/10.13039/501100000780 |
op_rights |
open |
op_doi |
https://doi.org/10.1016/j.marpetgeo.2015.11.01410.13039/501100000780 |
container_title |
Marine and Petroleum Geology |
container_volume |
71 |
container_start_page |
76 |
op_container_end_page |
82 |
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1790596412805742592 |