MARINE ORGANIC CARBON AND RADIOCARBON - PRESENT AND FUTURE CHALLENGES

Ellen R.M. Druffel; Steven R. Beaupré; Hendrik Grotheer; Christian B. Lewis; Ann P. McNichol; Gesine Mollenhauer; Brett D. Walker

doi:10.1017/RDC.2021.105

MARINE ORGANIC CARBON AND RADIOCARBON - PRESENT AND FUTURE CHALLENGES

Ellen R.M. Druffel
, Steven R. Beaupré
, Hendrik Grotheer
, Christian B. Lewis
, Ann P. McNichol
, Gesine Mollenhauer
, Brett D. Walker

University of California at Irvine
Alfred Wegener Institute - Helmholtz Centre for Polar and Marine Research
Woods Hole Oceanographic Institution
University of Ottawa

Research output: Contribution to journal › Review article › peer-review

16 Scopus citations

Abstract

We discuss present and developing techniques for studying radiocarbon in marine organic carbon (C). Bulk DOC (dissolved organic C) Δ14C measurements reveal information about the cycling time and sources of DOC in the ocean, yet they are time consuming and need to be streamlined. To further elucidate the cycling of DOC, various fractions have been separated from bulk DOC, through solid phase extraction of DOC, and ultrafiltration of high and low molecular weight DOC. Research using 14C of DOC and particulate organic C separated into organic fractions revealed that the acid insoluble fraction is similar in 14C signature to that of the lipid fraction. Plans for utilizing this methodology are described. Studies using compound specific radiocarbon analyses to study the origin of biomarkers in the marine environment are reviewed and plans for the future are outlined. Development of ramped pyrolysis oxidation methods are discussed and scientific questions addressed. A modified elemental analysis (EA) combustion reactor is described that allows high particulate organic C sample throughput by direct coupling with the MIniCArbonDAting System.

Original language	English
Pages (from-to)	705-721
Number of pages	17
Journal	Radiocarbon
Volume	64
Issue number	4
DOIs	https://doi.org/10.1017/RDC.2021.105
State	Published - Aug 25 2022

Keywords

CSRA
dissolved organic carbon
methodology
organic carbon
radiocarbon

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10.1017/RDC.2021.105

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@article{55bf24a4bbef49bead80d82a2b82faaa,

title = "MARINE ORGANIC CARBON AND RADIOCARBON - PRESENT AND FUTURE CHALLENGES",

abstract = "We discuss present and developing techniques for studying radiocarbon in marine organic carbon (C). Bulk DOC (dissolved organic C) Δ14C measurements reveal information about the cycling time and sources of DOC in the ocean, yet they are time consuming and need to be streamlined. To further elucidate the cycling of DOC, various fractions have been separated from bulk DOC, through solid phase extraction of DOC, and ultrafiltration of high and low molecular weight DOC. Research using 14C of DOC and particulate organic C separated into organic fractions revealed that the acid insoluble fraction is similar in 14C signature to that of the lipid fraction. Plans for utilizing this methodology are described. Studies using compound specific radiocarbon analyses to study the origin of biomarkers in the marine environment are reviewed and plans for the future are outlined. Development of ramped pyrolysis oxidation methods are discussed and scientific questions addressed. A modified elemental analysis (EA) combustion reactor is described that allows high particulate organic C sample throughput by direct coupling with the MIniCArbonDAting System.",

keywords = "CSRA, dissolved organic carbon, methodology, organic carbon, radiocarbon",

author = "Druffel, \{Ellen R.M.\} and Beaupr{\'e}, \{Steven R.\} and Hendrik Grotheer and Lewis, \{Christian B.\} and McNichol, \{Ann P.\} and Gesine Mollenhauer and Walker, \{Brett D.\}",

note = "Publisher Copyright: Copyright {\textcopyright} The Author(s), 2022. Published by Cambridge University Press on behalf of The Paleontological Society.",

year = "2022",

month = aug,

day = "25",

doi = "10.1017/RDC.2021.105",

language = "English",

volume = "64",

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journal = "Radiocarbon",

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AU - Druffel, Ellen R.M.

AU - Beaupré, Steven R.

AU - Grotheer, Hendrik

AU - Lewis, Christian B.

AU - McNichol, Ann P.

AU - Mollenhauer, Gesine

AU - Walker, Brett D.

PY - 2022/8/25

Y1 - 2022/8/25

N2 - We discuss present and developing techniques for studying radiocarbon in marine organic carbon (C). Bulk DOC (dissolved organic C) Δ14C measurements reveal information about the cycling time and sources of DOC in the ocean, yet they are time consuming and need to be streamlined. To further elucidate the cycling of DOC, various fractions have been separated from bulk DOC, through solid phase extraction of DOC, and ultrafiltration of high and low molecular weight DOC. Research using 14C of DOC and particulate organic C separated into organic fractions revealed that the acid insoluble fraction is similar in 14C signature to that of the lipid fraction. Plans for utilizing this methodology are described. Studies using compound specific radiocarbon analyses to study the origin of biomarkers in the marine environment are reviewed and plans for the future are outlined. Development of ramped pyrolysis oxidation methods are discussed and scientific questions addressed. A modified elemental analysis (EA) combustion reactor is described that allows high particulate organic C sample throughput by direct coupling with the MIniCArbonDAting System.

AB - We discuss present and developing techniques for studying radiocarbon in marine organic carbon (C). Bulk DOC (dissolved organic C) Δ14C measurements reveal information about the cycling time and sources of DOC in the ocean, yet they are time consuming and need to be streamlined. To further elucidate the cycling of DOC, various fractions have been separated from bulk DOC, through solid phase extraction of DOC, and ultrafiltration of high and low molecular weight DOC. Research using 14C of DOC and particulate organic C separated into organic fractions revealed that the acid insoluble fraction is similar in 14C signature to that of the lipid fraction. Plans for utilizing this methodology are described. Studies using compound specific radiocarbon analyses to study the origin of biomarkers in the marine environment are reviewed and plans for the future are outlined. Development of ramped pyrolysis oxidation methods are discussed and scientific questions addressed. A modified elemental analysis (EA) combustion reactor is described that allows high particulate organic C sample throughput by direct coupling with the MIniCArbonDAting System.

KW - CSRA

KW - dissolved organic carbon

KW - methodology

KW - organic carbon

KW - radiocarbon

UR - https://www.scopus.com/pages/publications/85123992521

U2 - 10.1017/RDC.2021.105

DO - 10.1017/RDC.2021.105

M3 - Review article

AN - SCOPUS:85123992521

SN - 0033-8222

VL - 64

SP - 705

EP - 721

JO - Radiocarbon

JF - Radiocarbon

IS - 4

ER -

MARINE ORGANIC CARBON AND RADIOCARBON - PRESENT AND FUTURE CHALLENGES

Abstract

Keywords

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