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Measurements of the stable carbon isotope composition of dissolved inorganic carbon in the northeastern Atlantic and Nordic Seas during summer 2012

Measurements of the stable carbon isotope composition of dissolved inorganic carbon in the northeastern Atlantic and Nordic Seas during summer 2012
Measurements of the stable carbon isotope composition of dissolved inorganic carbon in the northeastern Atlantic and Nordic Seas during summer 2012
The stable carbon isotope composition of dissolved inorganic carbon (?13CDIC) in seawater was measured in a batch process for 552 samples collected during two cruises in the northeastern Atlantic and Nordic Seas from June to August 2012. One cruise was part of the UK Ocean Acidification research programme, and the other was a repeat hydrographic transect of the Extended Ellett Line. In combination with measurements made of other variables on these and other cruises, these data can be used to constrain the anthropogenic component of dissolved inorganic carbon (DIC) in the interior ocean, and to help to determine the influence of biological carbon uptake on surface ocean carbonate chemistry. The measurements have been processed, quality-controlled and submitted to an in-preparation global compilation of seawater ?13CDIC data, and are available from the British Oceanographic Data Centre. The observed ?13CDIC values fall in a range from ?0.58 to +2.37 ‰, relative to the Vienna Pee Dee Belemnite standard. The mean of the absolute differences between samples collected in duplicate in the same container type during both cruises and measured consecutively is 0.10 ‰, which corresponds to a 1? uncertainty of 0.09 ‰, and which is within the range reported by other published studies of this kind. A crossover analysis was performed with nearby historical ?13CDIC data, indicating that any systematic offsets between our measurements and previously published results are negligible.
1866-3516
127-135
Humphreys, Matthew P.
40cb219a-c2dd-4581-94d0-52fb1c992498
Achterberg, Eric P.
685ce961-8c45-4503-9f03-50f6561202b9
Griffiths, Alex M.
d578f89f-bba1-4a09-a6aa-f32af3ce8f94
McDonald, Alison
cae22c01-babd-4b00-834e-fcb7fd8c4646
Boyce, Adrian J.
e21e60d3-a9ab-4cad-9bd8-f6680f3dbd7f
Humphreys, Matthew P.
40cb219a-c2dd-4581-94d0-52fb1c992498
Achterberg, Eric P.
685ce961-8c45-4503-9f03-50f6561202b9
Griffiths, Alex M.
d578f89f-bba1-4a09-a6aa-f32af3ce8f94
McDonald, Alison
cae22c01-babd-4b00-834e-fcb7fd8c4646
Boyce, Adrian J.
e21e60d3-a9ab-4cad-9bd8-f6680f3dbd7f

Humphreys, Matthew P., Achterberg, Eric P., Griffiths, Alex M., McDonald, Alison and Boyce, Adrian J. (2015) Measurements of the stable carbon isotope composition of dissolved inorganic carbon in the northeastern Atlantic and Nordic Seas during summer 2012. Earth System Science Data, 7 (1), 127-135. (doi:10.5194/essd-7-127-2015).

Record type: Article

Abstract

The stable carbon isotope composition of dissolved inorganic carbon (?13CDIC) in seawater was measured in a batch process for 552 samples collected during two cruises in the northeastern Atlantic and Nordic Seas from June to August 2012. One cruise was part of the UK Ocean Acidification research programme, and the other was a repeat hydrographic transect of the Extended Ellett Line. In combination with measurements made of other variables on these and other cruises, these data can be used to constrain the anthropogenic component of dissolved inorganic carbon (DIC) in the interior ocean, and to help to determine the influence of biological carbon uptake on surface ocean carbonate chemistry. The measurements have been processed, quality-controlled and submitted to an in-preparation global compilation of seawater ?13CDIC data, and are available from the British Oceanographic Data Centre. The observed ?13CDIC values fall in a range from ?0.58 to +2.37 ‰, relative to the Vienna Pee Dee Belemnite standard. The mean of the absolute differences between samples collected in duplicate in the same container type during both cruises and measured consecutively is 0.10 ‰, which corresponds to a 1? uncertainty of 0.09 ‰, and which is within the range reported by other published studies of this kind. A crossover analysis was performed with nearby historical ?13CDIC data, indicating that any systematic offsets between our measurements and previously published results are negligible.

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Published date: 15 June 2015
Organisations: Ocean and Earth Science

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Local EPrints ID: 380050
URI: http://eprints.soton.ac.uk/id/eprint/380050
ISSN: 1866-3516
PURE UUID: 947c2479-6ab8-4999-b7c1-0426c64aad66
ORCID for Matthew P. Humphreys: ORCID iD orcid.org/0000-0002-9371-7128

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Date deposited: 05 Aug 2015 09:00
Last modified: 10 Jan 2022 03:03

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Author: Matthew P. Humphreys ORCID iD
Author: Alex M. Griffiths
Author: Alison McDonald
Author: Adrian J. Boyce

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