Global 3-D Simulations of the Triple Oxygen Isotope Signature Δ17O in Atmospheric CO2

Gerbrand Koren*, Linda Schneider, Ivar R. van der Velde, Erik van Schaik, Sergey S. Gromov, Getachew A. Adnew, Dorota J. Mrozek Martino, Magdalena E.G. Hofmann, Mao Chang Liang, Sasadhar Mahata, Peter Bergamaschi, Ingrid T. van der Laan-Luijkx, Maarten C. Krol, Thomas Röckmann, Wouter Peters

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

The triple oxygen isotope signature Δ17O in atmospheric CO2, also known as its “17O excess,” has been proposed as a tracer for gross primary production (the gross uptake of CO2 by vegetation through photosynthesis). We present the first global 3-D model simulations for Δ17O in atmospheric CO2 together with a detailed model description and sensitivity analyses. In our 3-D model framework we include the stratospheric source of Δ17O in CO2 and the surface sinks from vegetation, soils, ocean, biomass burning, and fossil fuel combustion. The effect of oxidation of atmospheric CO on Δ17O in CO2 is also included in our model. We estimate that the global mean Δ17O (defined as Δ17O = ln(δ17O+1)−λRL·ln(δ18O+1) with λRL = 0.5229) of CO2 in the lowest 500 m of the atmosphere is 39.6 per meg, which is ∼20 per meg lower than estimates from existing box models. We compare our model results with a measured stratospheric Δ17O in CO2 profile from Sodankylä (Finland), which shows good agreement. In addition, we compare our model results with tropospheric measurements of Δ17O in CO2 from Göttingen (Germany) and Taipei (Taiwan), which shows some agreement but we also find substantial discrepancies that are subsequently discussed. Finally, we show model results for Zotino (Russia), Mauna Loa (United States), Manaus (Brazil), and South Pole, which we propose as possible locations for future measurements of Δ17O in tropospheric CO2 that can help to further increase our understanding of the global budget of Δ17O in atmospheric CO2.

Original languageEnglish
JournalJournal of Geophysical Research: Atmospheres
DOIs
Publication statusE-pub ahead of print - 19 Jun 2019

Fingerprint

Oxygen Isotopes
oxygen isotopes
oxygen isotope
isotopes
signatures
oxygen
simulation
Upper atmosphere
vegetation
global budgets
Loa
fuel combustion
biomass burning
fossil fuels
Finland
photosynthesis
Photosynthesis
combustion
Taiwan
Brazil

Keywords

  • O excess (ΔO)
  • carbon cycle
  • carbon dioxide (CO)
  • gross primary production (GPP)
  • mass-independent fractionation (MIF)
  • stable isotopes

Cite this

Koren, Gerbrand ; Schneider, Linda ; van der Velde, Ivar R. ; van Schaik, Erik ; Gromov, Sergey S. ; Adnew, Getachew A. ; Mrozek Martino, Dorota J. ; Hofmann, Magdalena E.G. ; Liang, Mao Chang ; Mahata, Sasadhar ; Bergamaschi, Peter ; van der Laan-Luijkx, Ingrid T. ; Krol, Maarten C. ; Röckmann, Thomas ; Peters, Wouter. / Global 3-D Simulations of the Triple Oxygen Isotope Signature Δ17O in Atmospheric CO2. In: Journal of Geophysical Research: Atmospheres. 2019.
@article{0120aae783ed40ec83aa5442f9dec7cb,
title = "Global 3-D Simulations of the Triple Oxygen Isotope Signature Δ17O in Atmospheric CO2",
abstract = "The triple oxygen isotope signature Δ17O in atmospheric CO2, also known as its “17O excess,” has been proposed as a tracer for gross primary production (the gross uptake of CO2 by vegetation through photosynthesis). We present the first global 3-D model simulations for Δ17O in atmospheric CO2 together with a detailed model description and sensitivity analyses. In our 3-D model framework we include the stratospheric source of Δ17O in CO2 and the surface sinks from vegetation, soils, ocean, biomass burning, and fossil fuel combustion. The effect of oxidation of atmospheric CO on Δ17O in CO2 is also included in our model. We estimate that the global mean Δ17O (defined as Δ17O = ln(δ17O+1)−λRL·ln(δ18O+1) with λRL = 0.5229) of CO2 in the lowest 500 m of the atmosphere is 39.6 per meg, which is ∼20 per meg lower than estimates from existing box models. We compare our model results with a measured stratospheric Δ17O in CO2 profile from Sodankyl{\"a} (Finland), which shows good agreement. In addition, we compare our model results with tropospheric measurements of Δ17O in CO2 from G{\"o}ttingen (Germany) and Taipei (Taiwan), which shows some agreement but we also find substantial discrepancies that are subsequently discussed. Finally, we show model results for Zotino (Russia), Mauna Loa (United States), Manaus (Brazil), and South Pole, which we propose as possible locations for future measurements of Δ17O in tropospheric CO2 that can help to further increase our understanding of the global budget of Δ17O in atmospheric CO2.",
keywords = "O excess (ΔO), carbon cycle, carbon dioxide (CO), gross primary production (GPP), mass-independent fractionation (MIF), stable isotopes",
author = "Gerbrand Koren and Linda Schneider and {van der Velde}, {Ivar R.} and {van Schaik}, Erik and Gromov, {Sergey S.} and Adnew, {Getachew A.} and {Mrozek Martino}, {Dorota J.} and Hofmann, {Magdalena E.G.} and Liang, {Mao Chang} and Sasadhar Mahata and Peter Bergamaschi and {van der Laan-Luijkx}, {Ingrid T.} and Krol, {Maarten C.} and Thomas R{\"o}ckmann and Wouter Peters",
year = "2019",
month = "6",
day = "19",
doi = "10.1029/2019JD030387",
language = "English",
journal = "Journal of Geophysical Research: Atmospheres",
issn = "2169-897X",
publisher = "American Geophysical Union",

}

Global 3-D Simulations of the Triple Oxygen Isotope Signature Δ17O in Atmospheric CO2. / Koren, Gerbrand; Schneider, Linda; van der Velde, Ivar R.; van Schaik, Erik; Gromov, Sergey S.; Adnew, Getachew A.; Mrozek Martino, Dorota J.; Hofmann, Magdalena E.G.; Liang, Mao Chang; Mahata, Sasadhar; Bergamaschi, Peter; van der Laan-Luijkx, Ingrid T.; Krol, Maarten C.; Röckmann, Thomas; Peters, Wouter.

In: Journal of Geophysical Research: Atmospheres, 19.06.2019.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Global 3-D Simulations of the Triple Oxygen Isotope Signature Δ17O in Atmospheric CO2

AU - Koren, Gerbrand

AU - Schneider, Linda

AU - van der Velde, Ivar R.

AU - van Schaik, Erik

AU - Gromov, Sergey S.

AU - Adnew, Getachew A.

AU - Mrozek Martino, Dorota J.

AU - Hofmann, Magdalena E.G.

AU - Liang, Mao Chang

AU - Mahata, Sasadhar

AU - Bergamaschi, Peter

AU - van der Laan-Luijkx, Ingrid T.

AU - Krol, Maarten C.

AU - Röckmann, Thomas

AU - Peters, Wouter

PY - 2019/6/19

Y1 - 2019/6/19

N2 - The triple oxygen isotope signature Δ17O in atmospheric CO2, also known as its “17O excess,” has been proposed as a tracer for gross primary production (the gross uptake of CO2 by vegetation through photosynthesis). We present the first global 3-D model simulations for Δ17O in atmospheric CO2 together with a detailed model description and sensitivity analyses. In our 3-D model framework we include the stratospheric source of Δ17O in CO2 and the surface sinks from vegetation, soils, ocean, biomass burning, and fossil fuel combustion. The effect of oxidation of atmospheric CO on Δ17O in CO2 is also included in our model. We estimate that the global mean Δ17O (defined as Δ17O = ln(δ17O+1)−λRL·ln(δ18O+1) with λRL = 0.5229) of CO2 in the lowest 500 m of the atmosphere is 39.6 per meg, which is ∼20 per meg lower than estimates from existing box models. We compare our model results with a measured stratospheric Δ17O in CO2 profile from Sodankylä (Finland), which shows good agreement. In addition, we compare our model results with tropospheric measurements of Δ17O in CO2 from Göttingen (Germany) and Taipei (Taiwan), which shows some agreement but we also find substantial discrepancies that are subsequently discussed. Finally, we show model results for Zotino (Russia), Mauna Loa (United States), Manaus (Brazil), and South Pole, which we propose as possible locations for future measurements of Δ17O in tropospheric CO2 that can help to further increase our understanding of the global budget of Δ17O in atmospheric CO2.

AB - The triple oxygen isotope signature Δ17O in atmospheric CO2, also known as its “17O excess,” has been proposed as a tracer for gross primary production (the gross uptake of CO2 by vegetation through photosynthesis). We present the first global 3-D model simulations for Δ17O in atmospheric CO2 together with a detailed model description and sensitivity analyses. In our 3-D model framework we include the stratospheric source of Δ17O in CO2 and the surface sinks from vegetation, soils, ocean, biomass burning, and fossil fuel combustion. The effect of oxidation of atmospheric CO on Δ17O in CO2 is also included in our model. We estimate that the global mean Δ17O (defined as Δ17O = ln(δ17O+1)−λRL·ln(δ18O+1) with λRL = 0.5229) of CO2 in the lowest 500 m of the atmosphere is 39.6 per meg, which is ∼20 per meg lower than estimates from existing box models. We compare our model results with a measured stratospheric Δ17O in CO2 profile from Sodankylä (Finland), which shows good agreement. In addition, we compare our model results with tropospheric measurements of Δ17O in CO2 from Göttingen (Germany) and Taipei (Taiwan), which shows some agreement but we also find substantial discrepancies that are subsequently discussed. Finally, we show model results for Zotino (Russia), Mauna Loa (United States), Manaus (Brazil), and South Pole, which we propose as possible locations for future measurements of Δ17O in tropospheric CO2 that can help to further increase our understanding of the global budget of Δ17O in atmospheric CO2.

KW - O excess (ΔO)

KW - carbon cycle

KW - carbon dioxide (CO)

KW - gross primary production (GPP)

KW - mass-independent fractionation (MIF)

KW - stable isotopes

U2 - 10.1029/2019JD030387

DO - 10.1029/2019JD030387

M3 - Article

JO - Journal of Geophysical Research: Atmospheres

JF - Journal of Geophysical Research: Atmospheres

SN - 2169-897X

ER -