Deciphering the atmospheric signal in marine sulfate oxygen isotope composition

A. R. Waldeck; B. R. Cowie; E. Bertran; B. A. Wing; I. Halevy; D. T. Johnston

doi:https://doi.org/10.1016/j.epsl.2019.06.013

Deciphering the atmospheric signal in marine sulfate oxygen isotope composition

A. R. Waldeck, B. R. Cowie, E. Bertran, B. A. Wing, I. Halevy, D. T. Johnston

Department of Earth and Planetary Sciences

Weizmann Institute of Science

Research output: Contribution to journal › Article › peer-review

Abstract

Atmospheric O-2 and CO2 levels inform us of the changes in chemical and biological environments, yet the history of atmospheric compositions, and pO(2) in particular, is not well-constrained. The triple oxygen isotope (O-16,O-17,O-18) composition of marine SO42- has been proposed to directly record the ratio pO(2)/pCO(2) in the contemporaneous atmosphere. To resolve this atmospheric signal, both a precise measurement of the O-17 composition of sulfate and a model with which to interpret the measurement are needed. Here we present precise measurements of the triple oxygen isotope composition of modern marine sulfate and then forward a novel sulfur cycle model that deconvolves the potential atmospheric and microbial inputs to this signal. Our interpretation of marine sulfate oxygen isotope composition provides a framework for calculating atmospheric composition, relative rates of biogeochemical activity, and can be applied to geologic records of marine sulfate to constrain the pO(2)/pCO(2) ratio over time. (C) 2019 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	12-19
Number of pages	8
Journal	Earth and Planetary Science Letters
Volume	522
DOIs	https://doi.org/10.1016/j.epsl.2019.06.013
State	Published - 15 Sep 2019

All Science Journal Classification (ASJC) codes

Geochemistry and Petrology
Geophysics
Earth and Planetary Sciences (miscellaneous)
Space and Planetary Science

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title = "Deciphering the atmospheric signal in marine sulfate oxygen isotope composition",

abstract = "Atmospheric O-2 and CO2 levels inform us of the changes in chemical and biological environments, yet the history of atmospheric compositions, and pO(2) in particular, is not well-constrained. The triple oxygen isotope (O-16,O-17,O-18) composition of marine SO42- has been proposed to directly record the ratio pO(2)/pCO(2) in the contemporaneous atmosphere. To resolve this atmospheric signal, both a precise measurement of the O-17 composition of sulfate and a model with which to interpret the measurement are needed. Here we present precise measurements of the triple oxygen isotope composition of modern marine sulfate and then forward a novel sulfur cycle model that deconvolves the potential atmospheric and microbial inputs to this signal. Our interpretation of marine sulfate oxygen isotope composition provides a framework for calculating atmospheric composition, relative rates of biogeochemical activity, and can be applied to geologic records of marine sulfate to constrain the pO(2)/pCO(2) ratio over time. (C) 2019 Elsevier B.V. All rights reserved.",

author = "Waldeck, {A. R.} and Cowie, {B. R.} and E. Bertran and Wing, {B. A.} and I. Halevy and Johnston, {D. T.}",

note = "We thank K. Casciotti and W. Berelson for sample collection (Johnston et al., 2014). Funding was provided by Harvard University (A.W.), NSF OCE-1821958, and NASA NNA13AA90A and NNX15AP58G",

year = "2019",

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doi = "https://doi.org/10.1016/j.epsl.2019.06.013",

language = "الإنجليزيّة",

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T1 - Deciphering the atmospheric signal in marine sulfate oxygen isotope composition

AU - Waldeck, A. R.

AU - Cowie, B. R.

AU - Bertran, E.

AU - Wing, B. A.

AU - Halevy, I.

AU - Johnston, D. T.

N1 - We thank K. Casciotti and W. Berelson for sample collection (Johnston et al., 2014). Funding was provided by Harvard University (A.W.), NSF OCE-1821958, and NASA NNA13AA90A and NNX15AP58G

PY - 2019/9/15

Y1 - 2019/9/15

N2 - Atmospheric O-2 and CO2 levels inform us of the changes in chemical and biological environments, yet the history of atmospheric compositions, and pO(2) in particular, is not well-constrained. The triple oxygen isotope (O-16,O-17,O-18) composition of marine SO42- has been proposed to directly record the ratio pO(2)/pCO(2) in the contemporaneous atmosphere. To resolve this atmospheric signal, both a precise measurement of the O-17 composition of sulfate and a model with which to interpret the measurement are needed. Here we present precise measurements of the triple oxygen isotope composition of modern marine sulfate and then forward a novel sulfur cycle model that deconvolves the potential atmospheric and microbial inputs to this signal. Our interpretation of marine sulfate oxygen isotope composition provides a framework for calculating atmospheric composition, relative rates of biogeochemical activity, and can be applied to geologic records of marine sulfate to constrain the pO(2)/pCO(2) ratio over time. (C) 2019 Elsevier B.V. All rights reserved.

AB - Atmospheric O-2 and CO2 levels inform us of the changes in chemical and biological environments, yet the history of atmospheric compositions, and pO(2) in particular, is not well-constrained. The triple oxygen isotope (O-16,O-17,O-18) composition of marine SO42- has been proposed to directly record the ratio pO(2)/pCO(2) in the contemporaneous atmosphere. To resolve this atmospheric signal, both a precise measurement of the O-17 composition of sulfate and a model with which to interpret the measurement are needed. Here we present precise measurements of the triple oxygen isotope composition of modern marine sulfate and then forward a novel sulfur cycle model that deconvolves the potential atmospheric and microbial inputs to this signal. Our interpretation of marine sulfate oxygen isotope composition provides a framework for calculating atmospheric composition, relative rates of biogeochemical activity, and can be applied to geologic records of marine sulfate to constrain the pO(2)/pCO(2) ratio over time. (C) 2019 Elsevier B.V. All rights reserved.

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U2 - https://doi.org/10.1016/j.epsl.2019.06.013

DO - https://doi.org/10.1016/j.epsl.2019.06.013

M3 - مقالة

SN - 0012-821X

VL - 522

SP - 12

EP - 19

JO - Earth and Planetary Science Letters

JF - Earth and Planetary Science Letters

ER -

Deciphering the atmospheric signal in marine sulfate oxygen isotope composition

Abstract

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