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dc.contributor.authorKOREN GERBRANDen_GB
dc.contributor.authorSCHNEIDER LINDAen_GB
dc.contributor.authorVAN DER VELDE IVAR R.en_GB
dc.contributor.authorVAN SCHAIK ERIKen_GB
dc.contributor.authorGROMOV SERGEY S.en_GB
dc.contributor.authorADNEW GETACHEW A.en_GB
dc.contributor.authorMROZEK DOROTA J.en_GB
dc.contributor.authorHOFMANN MAGDALENA E.G.en_GB
dc.contributor.authorLIANG MAO-CHANGen_GB
dc.contributor.authorMAHATA SASADHARen_GB
dc.contributor.authorBERGAMASCHI PETERen_GB
dc.contributor.authorVAN DER LAAN-LUIJKX INGRID T.en_GB
dc.contributor.authorKROL M.en_GB
dc.contributor.authorROECKMANN THOMASen_GB
dc.contributor.authorPETERS W.en_GB
dc.identifier.citationJOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES vol. 124 no. 15 p. 8808-8836en_GB
dc.identifier.issn2169-897X (online)en_GB
dc.description.abstractThe 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 urn:x-wiley:jgrd:media:jgrd55562:jgrd55562-math-0001 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.en_GB
dc.description.sponsorshipJRC.C.5-Air and Climateen_GB
dc.titleGlobal 3‐D Simulations of the Triple Oxygen Isotope Signature Δ17O in Atmospheric CO2en_GB
dc.typeArticles in periodicals and booksen_GB
dc.identifier.doi10.1029/2019JD030387 (online)en_GB
JRC Directorate:Energy, Transport and Climate

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