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 Δ

SUBMITTER: Koren G 

PROVIDER: S-EPMC6774299 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature