Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 552827
Title Global 3-D Simulations of the Triple Oxygen Isotope Signature Δ17O in Atmospheric CO2
Author(s) Koren, Gerbrand; Schneider, Linda; Velde, Ivar R. van der; Schaik, Erik van; Gromov, Sergey S.; Adnew, Getachew A.; Mrozek Martino, Dorota J.; Hofmann, Magdalena E.G.; Liang, Mao Chang; Mahata, Sasadhar; Bergamaschi, Peter; Laan-Luijkx, Ingrid T. van der; Krol, Maarten C.; Röckmann, Thomas; Peters, Wouter
Source Journal of Geophysical Research: Atmospheres (2019). - ISSN 2169-897X
DOI https://doi.org/10.1029/2019JD030387
Department(s) Meteorology and Air Quality
WIMEK
Publication type Refereed Article in a scientific journal
Publication year 2019
Keyword(s) O excess (ΔO) - carbon cycle - carbon dioxide (CO) - gross primary production (GPP) - mass-independent fractionation (MIF) - stable isotopes
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.

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