Global 3-D Simulations of the Triple Oxygen Isotope Signature Δ 17 O in Atmospheric CO 2 .

Autor: Koren G; Meteorology and Air Quality Group Wageningen University & Research Wageningen The Netherlands., Schneider L; Institute of Meteorology and Climate Research (IMK-TRO) Karlsruhe Institute of Technology Karlsruhe Germany.; Now at Zentrum für Sonnenenergie- und Wasserstoff-Forschung Baden-Württemberg (ZSW) Stuttgart Germany., van der Velde IR; Earth System Research Laboratory National Oceanic and Atmospheric Administration Boulder CO USA.; Now at Faculty of Science VU University Amsterdam Amsterdam The Netherlands., van Schaik E; Meteorology and Air Quality Group Wageningen University & Research Wageningen The Netherlands., Gromov SS; Atmospheric Chemistry Department Max-Planck Institute for Chemistry Mainz Germany.; Institute of Global Climate and Ecology of Roshydromet and RAS Moscow Russia., Adnew GA; Institute of Marine and Atmospheric Research Utrecht University Utrecht The Netherlands., Mrozek Martino DJ; Institute of Marine and Atmospheric Research Utrecht University Utrecht The Netherlands., Hofmann MEG; Institute of Marine and Atmospheric Research Utrecht University Utrecht The Netherlands.; Now at Picarro B.V. 's-Hertogenbosch The Netherlands., Liang MC; Institute of Earth Sciences Academia Sinica Taipei Taiwan., Mahata S; Institute of Global Environmental Change Xian Jiaotong University Xian China., Bergamaschi P; European Commission Joint Research Centre Ispra (Va) Italy., van der Laan-Luijkx IT; Meteorology and Air Quality Group Wageningen University & Research Wageningen The Netherlands., Krol MC; Meteorology and Air Quality Group Wageningen University & Research Wageningen The Netherlands.; Institute of Marine and Atmospheric Research Utrecht University Utrecht The Netherlands., Röckmann T; Institute of Marine and Atmospheric Research Utrecht University Utrecht The Netherlands., Peters W; Meteorology and Air Quality Group Wageningen University & Research Wageningen The Netherlands.; Centre for Isotope Research University of Groningen Groningen The Netherlands.
Jazyk: angličtina
Zdroj: Journal of geophysical research. Atmospheres : JGR [J Geophys Res Atmos] 2019 Aug 16; Vol. 124 (15), pp. 8808-8836. Date of Electronic Publication: 2019 Aug 04.
DOI: 10.1029/2019JD030387
Abstrakt: The triple oxygen isotope signature Δ 17 O in atmospheric CO 2 , also known as its " 17 O excess," has been proposed as a tracer for gross primary production (the gross uptake of CO 2 by vegetation through photosynthesis). We present the first global 3-D model simulations for Δ 17 O in atmospheric CO 2 together with a detailed model description and sensitivity analyses. In our 3-D model framework we include the stratospheric source of Δ 17 O in CO 2 and the surface sinks from vegetation, soils, ocean, biomass burning, and fossil fuel combustion. The effect of oxidation of atmospheric CO on Δ 17 O in CO 2 is also included in our model. We estimate that the global mean Δ 17 O (defined as Δ 17 O = ln ( δ 17 O + 1 ) - λ RL · ln ( δ 18 O + 1 ) with λ RL = 0.5229) of CO 2 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 Δ 17 O in CO 2 profile from Sodankylä (Finland), which shows good agreement. In addition, we compare our model results with tropospheric measurements of Δ 17 O in CO 2 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 Δ 17 O in tropospheric CO 2 that can help to further increase our understanding of the global budget of Δ 17 O in atmospheric CO 2 .
(©2019. The Authors.)
Databáze: MEDLINE
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