Oxygen isotope anomaly in tropospheric CO₂ and implications for CO₂ residence time in the atmosphere and gross primary productivity.

ABSTRACT: The abundance variations of near surface atmospheric CO₂ isotopologues (primarily ¹⁶O¹²C¹⁶O, ¹⁶O¹³C¹⁶O, ¹⁷O¹²C¹⁶O, and ¹⁸O¹²C¹⁶O) represent an integrated signal from anthropogenic/biogeochemical processes, including fossil fuel burning, biospheric photosynthesis and respiration, hydrospheric isotope exchange with water, and stratospheric photochemistry. Oxygen isotopes, in particular, are affected by the carbon and water cycles. Being a useful tracer that directly probes governing processes in CO₂ biogeochemical cycles, Δ¹⁷O (=ln(1 + δ¹⁷O) - 0.516 × ln(1 + δ¹⁸O)) provides an alternative constraint on the s

SUBMITTER: Liang MC 

PROVIDER: S-EPMC5640618 | biostudies-literature | 2017 Oct

REPOSITORIES: biostudies-literature