SUB-OCEAN: subsea dissolved methane measurements using an embedded laser spectrometer technology
This document is the Accepted Manuscript version of a Published Work that appeared in final form in Environmental Science and Technology , copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org...
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American Chemical Society
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Online Access: | https://hdl.handle.net/10037/13956 https://doi.org/10.1021/acs.est.7b06171 |
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ftunivtroemsoe:oai:munin.uit.no:10037/13956 2023-05-15T14:28:04+02:00 SUB-OCEAN: subsea dissolved methane measurements using an embedded laser spectrometer technology Grilli, Roberto Triest, Jack Chappellaz, Jérôme Calzas, Michel Desbois, Thibault Jansson, Pær Guillerm, Christophe Ferré, Benedicte Lechevallier, Loïc Ledoux, Victor Romanini, Daniele 2018-08-16 https://hdl.handle.net/10037/13956 https://doi.org/10.1021/acs.est.7b06171 eng eng American Chemical Society Environmental Science and Technology info:eu-repo/grantAgreement/EC/FP7-IDEAS-ERC/291062/EU/Innovative Concepts for Extracting climate and atmospheric composition records from polar ice cores using new LASER Sensors/ICE&LASERS/ info:eu-repo/grantAgreement/EC/H2020-EU.1.1. - EXCELLENT SCIENCE/713619/EU/OCEAN in-situ Isotope and Dissolved gas sensing/OCEAN-IDs/ info:eu-repo/grantAgreement/RCN/SFF/223259/Norway/Centre for Arctic Gas Hydrate, Environment and Climate/CAGE/ Grilli, R., Triest, J., Chappellaz, J., Calzas, M., Desbois, T., Jansson, P., . Romanini, D. (2018). SUB-OCEAN: subsea dissolved methane measurements using an embedded laser spectrometer technology. Environmental Science and Technology, 52, 10543-10551. https://doi.org/10.1021/acs.est.7b06171 FRIDAID 1604825 doi:10.1021/acs.est.7b06171 0013-936X 1520-5851 https://hdl.handle.net/10037/13956 openAccess VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 Journal article Tidsskriftartikkel Peer reviewed 2018 ftunivtroemsoe https://doi.org/10.1021/acs.est.7b06171 2021-06-25T17:56:09Z This document is the Accepted Manuscript version of a Published Work that appeared in final form in Environmental Science and Technology , copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.est.7b06171 . We present a novel instrument, the Sub-Ocean probe, allowing in situ and continuous measurements of dissolved methane in seawater. It relies on an optical feedback cavity enhanced absorption technique designed for trace gas measurements and coupled to a patent-pending sample extraction method. The considerable advantage of the instrument compared with existing ones lies in its fast response time of the order of 30 s, that makes this probe ideal for fast and continuous 3D-mapping of dissolved methane in water. It could work up to 40 MPa of external pressure and it provides a large dynamic range, from subnmol of CH 4 per liter of seawater to mmol L -1 . In this work, we present laboratory calibration of the instrument, intercomparison with standard method and field results on methane detection. The good agreement with the headspace equilibration technique followed by gas-chromatography analysis supports the utility and accuracy of the instrument. A continuous 620-m depth vertical profile in the Mediterranean Sea was obtained within only 10 min and it indicates background dissolved CH 4 values between 1 and 2 nmol L -1 below the pycnocline, similar to previous observations conducted in different ocean settings. It also reveals a methane maximum at around 6 m of depth that may reflect local production from bacterial transformation of dissolved organic matter. Article in Journal/Newspaper Arctic University of Tromsø: Munin Open Research Archive Environmental Science & Technology 52 18 10543 10551 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 |
spellingShingle |
VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 Grilli, Roberto Triest, Jack Chappellaz, Jérôme Calzas, Michel Desbois, Thibault Jansson, Pær Guillerm, Christophe Ferré, Benedicte Lechevallier, Loïc Ledoux, Victor Romanini, Daniele SUB-OCEAN: subsea dissolved methane measurements using an embedded laser spectrometer technology |
topic_facet |
VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 |
description |
This document is the Accepted Manuscript version of a Published Work that appeared in final form in Environmental Science and Technology , copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.est.7b06171 . We present a novel instrument, the Sub-Ocean probe, allowing in situ and continuous measurements of dissolved methane in seawater. It relies on an optical feedback cavity enhanced absorption technique designed for trace gas measurements and coupled to a patent-pending sample extraction method. The considerable advantage of the instrument compared with existing ones lies in its fast response time of the order of 30 s, that makes this probe ideal for fast and continuous 3D-mapping of dissolved methane in water. It could work up to 40 MPa of external pressure and it provides a large dynamic range, from subnmol of CH 4 per liter of seawater to mmol L -1 . In this work, we present laboratory calibration of the instrument, intercomparison with standard method and field results on methane detection. The good agreement with the headspace equilibration technique followed by gas-chromatography analysis supports the utility and accuracy of the instrument. A continuous 620-m depth vertical profile in the Mediterranean Sea was obtained within only 10 min and it indicates background dissolved CH 4 values between 1 and 2 nmol L -1 below the pycnocline, similar to previous observations conducted in different ocean settings. It also reveals a methane maximum at around 6 m of depth that may reflect local production from bacterial transformation of dissolved organic matter. |
format |
Article in Journal/Newspaper |
author |
Grilli, Roberto Triest, Jack Chappellaz, Jérôme Calzas, Michel Desbois, Thibault Jansson, Pær Guillerm, Christophe Ferré, Benedicte Lechevallier, Loïc Ledoux, Victor Romanini, Daniele |
author_facet |
Grilli, Roberto Triest, Jack Chappellaz, Jérôme Calzas, Michel Desbois, Thibault Jansson, Pær Guillerm, Christophe Ferré, Benedicte Lechevallier, Loïc Ledoux, Victor Romanini, Daniele |
author_sort |
Grilli, Roberto |
title |
SUB-OCEAN: subsea dissolved methane measurements using an embedded laser spectrometer technology |
title_short |
SUB-OCEAN: subsea dissolved methane measurements using an embedded laser spectrometer technology |
title_full |
SUB-OCEAN: subsea dissolved methane measurements using an embedded laser spectrometer technology |
title_fullStr |
SUB-OCEAN: subsea dissolved methane measurements using an embedded laser spectrometer technology |
title_full_unstemmed |
SUB-OCEAN: subsea dissolved methane measurements using an embedded laser spectrometer technology |
title_sort |
sub-ocean: subsea dissolved methane measurements using an embedded laser spectrometer technology |
publisher |
American Chemical Society |
publishDate |
2018 |
url |
https://hdl.handle.net/10037/13956 https://doi.org/10.1021/acs.est.7b06171 |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
Environmental Science and Technology info:eu-repo/grantAgreement/EC/FP7-IDEAS-ERC/291062/EU/Innovative Concepts for Extracting climate and atmospheric composition records from polar ice cores using new LASER Sensors/ICE&LASERS/ info:eu-repo/grantAgreement/EC/H2020-EU.1.1. - EXCELLENT SCIENCE/713619/EU/OCEAN in-situ Isotope and Dissolved gas sensing/OCEAN-IDs/ info:eu-repo/grantAgreement/RCN/SFF/223259/Norway/Centre for Arctic Gas Hydrate, Environment and Climate/CAGE/ Grilli, R., Triest, J., Chappellaz, J., Calzas, M., Desbois, T., Jansson, P., . Romanini, D. (2018). SUB-OCEAN: subsea dissolved methane measurements using an embedded laser spectrometer technology. Environmental Science and Technology, 52, 10543-10551. https://doi.org/10.1021/acs.est.7b06171 FRIDAID 1604825 doi:10.1021/acs.est.7b06171 0013-936X 1520-5851 https://hdl.handle.net/10037/13956 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.1021/acs.est.7b06171 |
container_title |
Environmental Science & Technology |
container_volume |
52 |
container_issue |
18 |
container_start_page |
10543 |
op_container_end_page |
10551 |
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1766302210983985152 |