Sedimentary evidence for enhanced hydrological cycling in response to rapid carbon release during the early Toarcian oceanic anoxic event

Kentaro Izumi; David B Kemp; Shoma  Itamiya; Mutsuko  Inui

doi:10.1016/j.epsl.2017.10.030

Sedimentary evidence for enhanced hydrological cycling in response to rapid carbon release during the early Toarcian oceanic anoxic event

Kentaro Izumi (Corresponding Author), David B Kemp, Shoma Itamiya, Mutsuko Inui

Geology and Geophysics

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Abstract

A pronounced excursion in the carbon-isotope composition of
biospheric carbon and coeval seawater warming during the early Toarcian
(~183 Ma) has been linked to the large-scale transfer of 12C-enriched
carbon to the oceans and atmosphere. A European bias in the distribution
of available data means that the precise pattern, tempo and global
expression of this carbon cycle perturbation, and the associated
environmental responses, remain uncertain. Here, we present a new cmscale
terrestrial-dominated carbon-isotope record through an expanded
early Toarcian section from Japan that displays a negative excursion
pattern similar to marine and terrestrial carbon-isotope records
documented from Europe. These new data suggest that 12C-enriched carbon
was added to the biosphere in at least one rapid, millennial-scale pulse.
Sedimentological analysis indicates a close association between the
carbon-isotope excursion and high-energy sediment transport and enhanced
fluvial discharge. Together, these data support the hypothesis that a
sudden strengthening of the global hydrological cycle occurred in direct
and immediate response to rapid carbon release and atmospheric warming.

Original language	English
Pages (from-to)	162-170
Number of pages	9
Journal	Earth and Planetary Science Letters
Volume	481
Early online date	5 Nov 2017
DOIs	https://doi.org/10.1016/j.epsl.2017.10.030
Publication status	Published - 1 Jan 2018

Keywords

Toarcian
carbon isotope
hydrological cycling
sedimentology
atmospheric warming

UN SDGs

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© 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Accepted author manuscript, 3.06 MBLicence: CC BY-NC-ND

Cite this

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title = "Sedimentary evidence for enhanced hydrological cycling in response to rapid carbon release during the early Toarcian oceanic anoxic event",

abstract = " A pronounced excursion in the carbon-isotope composition ofbiospheric carbon and coeval seawater warming during the early Toarcian(~183 Ma) has been linked to the large-scale transfer of 12C-enrichedcarbon to the oceans and atmosphere. A European bias in the distributionof available data means that the precise pattern, tempo and globalexpression of this carbon cycle perturbation, and the associatedenvironmental responses, remain uncertain. Here, we present a new cmscaleterrestrial-dominated carbon-isotope record through an expandedearly Toarcian section from Japan that displays a negative excursionpattern similar to marine and terrestrial carbon-isotope recordsdocumented from Europe. These new data suggest that 12C-enriched carbonwas added to the biosphere in at least one rapid, millennial-scale pulse.Sedimentological analysis indicates a close association between thecarbon-isotope excursion and high-energy sediment transport and enhancedfluvial discharge. Together, these data support the hypothesis that asudden strengthening of the global hydrological cycle occurred in directand immediate response to rapid carbon release and atmospheric warming.",

keywords = "Toarcian, carbon isotope, hydrological cycling, sedimentology, atmospheric warming",

author = "Kentaro Izumi and Kemp, {David B} and Shoma Itamiya and Mutsuko Inui",

note = "Part of this work was financially supported by JSPS KAKENHI 12J08818 and 15J08821 to KI. DBK acknowledges recipe of NERC Fellowship NE/I02089X/1 and grants from the Sasakawa Foundation of Great Britain, grant number 4883, and Daiwa Anglo-Japanese Foundation, grant number 10960/12369. This study contributes to IGCP 655. We thank M. Ikeda, T. Ohta, K. Suzuki, N. Nishida and K. Kawano for assistance in the field and/or helpful discussion. Fieldwork was carried out with full permission and support from its landowners. S. Nicoara and S. Kurokawa are thanked for analytical assistance. The comments of the Editor (D. Vance) and three reviewers (G. Suan, S. Bodin, and an anonymous reviewer) greatly improved the manuscript.",

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doi = "10.1016/j.epsl.2017.10.030",

language = "English",

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T1 - Sedimentary evidence for enhanced hydrological cycling in response to rapid carbon release during the early Toarcian oceanic anoxic event

AU - Izumi, Kentaro

AU - Kemp, David B

AU - Itamiya, Shoma

AU - Inui, Mutsuko

N1 - Part of this work was financially supported by JSPS KAKENHI 12J08818 and 15J08821 to KI. DBK acknowledges recipe of NERC Fellowship NE/I02089X/1 and grants from the Sasakawa Foundation of Great Britain, grant number 4883, and Daiwa Anglo-Japanese Foundation, grant number 10960/12369. This study contributes to IGCP 655. We thank M. Ikeda, T. Ohta, K. Suzuki, N. Nishida and K. Kawano for assistance in the field and/or helpful discussion. Fieldwork was carried out with full permission and support from its landowners. S. Nicoara and S. Kurokawa are thanked for analytical assistance. The comments of the Editor (D. Vance) and three reviewers (G. Suan, S. Bodin, and an anonymous reviewer) greatly improved the manuscript.

PY - 2018/1/1

Y1 - 2018/1/1

N2 - A pronounced excursion in the carbon-isotope composition ofbiospheric carbon and coeval seawater warming during the early Toarcian(~183 Ma) has been linked to the large-scale transfer of 12C-enrichedcarbon to the oceans and atmosphere. A European bias in the distributionof available data means that the precise pattern, tempo and globalexpression of this carbon cycle perturbation, and the associatedenvironmental responses, remain uncertain. Here, we present a new cmscaleterrestrial-dominated carbon-isotope record through an expandedearly Toarcian section from Japan that displays a negative excursionpattern similar to marine and terrestrial carbon-isotope recordsdocumented from Europe. These new data suggest that 12C-enriched carbonwas added to the biosphere in at least one rapid, millennial-scale pulse.Sedimentological analysis indicates a close association between thecarbon-isotope excursion and high-energy sediment transport and enhancedfluvial discharge. Together, these data support the hypothesis that asudden strengthening of the global hydrological cycle occurred in directand immediate response to rapid carbon release and atmospheric warming.

AB - A pronounced excursion in the carbon-isotope composition ofbiospheric carbon and coeval seawater warming during the early Toarcian(~183 Ma) has been linked to the large-scale transfer of 12C-enrichedcarbon to the oceans and atmosphere. A European bias in the distributionof available data means that the precise pattern, tempo and globalexpression of this carbon cycle perturbation, and the associatedenvironmental responses, remain uncertain. Here, we present a new cmscaleterrestrial-dominated carbon-isotope record through an expandedearly Toarcian section from Japan that displays a negative excursionpattern similar to marine and terrestrial carbon-isotope recordsdocumented from Europe. These new data suggest that 12C-enriched carbonwas added to the biosphere in at least one rapid, millennial-scale pulse.Sedimentological analysis indicates a close association between thecarbon-isotope excursion and high-energy sediment transport and enhancedfluvial discharge. Together, these data support the hypothesis that asudden strengthening of the global hydrological cycle occurred in directand immediate response to rapid carbon release and atmospheric warming.

KW - Toarcian

KW - carbon isotope

KW - hydrological cycling

KW - sedimentology

KW - atmospheric warming

U2 - 10.1016/j.epsl.2017.10.030

DO - 10.1016/j.epsl.2017.10.030

M3 - Letter

VL - 481

SP - 162

EP - 170

JO - Earth and Planetary Science Letters

JF - Earth and Planetary Science Letters

SN - 0012-821X

ER -

Sedimentary evidence for enhanced hydrological cycling in response to rapid carbon release during the early Toarcian oceanic anoxic event

Abstract

Keywords

UN SDGs

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