CORE
🇺🇦
make metadata, not war
Services
Services overview
Explore all CORE services
Access to raw data
API
Dataset
FastSync
Content discovery
Recommender
Discovery
OAI identifiers
OAI Resolver
Managing content
Dashboard
Bespoke contracts
Consultancy services
Support us
Support us
Membership
Sponsorship
Community governance
Advisory Board
Board of supporters
Research network
About
About us
Our mission
Team
Blog
FAQs
Contact us
SUB-OCEAN: subsea dissolved methane measurements using an embedded laser spectrometer technology
Authors
Michel Calzas
Jérôme Chappellaz
+9 more
Thibault Desbois
Benedicte Ferré
Roberto Grilli
Christophe Guillerm
Pær Jansson
Loïc Lechevallier
Victor Ledoux
Daniele Romanini
Jack Triest
Publication date
1 January 2018
Publisher
'American Chemical Society (ACS)'
Doi
Cite
Abstract
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 CH4 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 CH4 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
Similar works
Full text
Open in the Core reader
Download PDF
Available Versions
HAL-IRD
See this paper in CORE
Go to the repository landing page
Download from data provider
oai:HAL:hal-01913459v1
Last time updated on 27/11/2018
Munin - Open Research Archive
See this paper in CORE
Go to the repository landing page
Download from data provider
oai:munin.uit.no:10037/13956
Last time updated on 26/03/2021
HAL-INSU
See this paper in CORE
Go to the repository landing page
Download from data provider
oai:HAL:hal-01913459v1
Last time updated on 27/11/2018
Hal - Université Grenoble Alpes
See this paper in CORE
Go to the repository landing page
Download from data provider
oai:HAL:hal-01913459v1
Last time updated on 07/01/2019
FigShare
See this paper in CORE
Go to the repository landing page
Download from data provider
oai:figshare.com:article/70196...
Last time updated on 30/05/2019
ArchiMer - Institutional Archive of Ifremer
See this paper in CORE
Go to the repository landing page
Download from data provider
oai:archimer.ifremer.fr:58312
Last time updated on 23/08/2022
NORA - Norwegian Open Research Archives
See this paper in CORE
Go to the repository landing page
Download from data provider
oai:munin.uit.no:10037/13956
Last time updated on 03/11/2018