Version 1
: Received: 20 December 2022 / Approved: 22 December 2022 / Online: 22 December 2022 (03:27:04 CET)
Version 2
: Received: 17 January 2023 / Approved: 17 January 2023 / Online: 17 January 2023 (02:24:26 CET)
How to cite:
Taylor, S. Atmospheric CO2 Two Box Model Accurately Tracks 14C and 13C without Requiring the "Revelle Isotopic Exception". Preprints2022, 2022120413. https://doi.org/10.20944/preprints202212.0413.v1
Taylor, S. Atmospheric CO2 Two Box Model Accurately Tracks 14C and 13C without Requiring the "Revelle Isotopic Exception". Preprints 2022, 2022120413. https://doi.org/10.20944/preprints202212.0413.v1
Taylor, S. Atmospheric CO2 Two Box Model Accurately Tracks 14C and 13C without Requiring the "Revelle Isotopic Exception". Preprints2022, 2022120413. https://doi.org/10.20944/preprints202212.0413.v1
APA Style
Taylor, S. (2022). Atmospheric CO<sub>2</sub> Two Box Model Accurately Tracks 14C and 13C without Requiring the "Revelle Isotopic Exception". Preprints. https://doi.org/10.20944/preprints202212.0413.v1
Chicago/Turabian Style
Taylor, S. 2022 "Atmospheric CO<sub>2</sub> Two Box Model Accurately Tracks 14C and 13C without Requiring the "Revelle Isotopic Exception"" Preprints. https://doi.org/10.20944/preprints202212.0413.v1
Abstract
Although nett CO2 flows can be estimated with reasonable accuracy, the contributing gross fluxes between the atmosphere and the earth's surface are poorly understood. This paper presents a means by which the global outflow and inflow of CO2 between atmosphere and "mixing reservoirs" can be calculated, using the radiocarbon isotopes 14CO2 and 13CO2 as a tracer. It has been asserted that isotopic CO2 cannot be directly used as a tracer in flow studies because Δ14C is not subject to the Revelle factor; evidence is provided showing that this view is mistaken. The model contains 7 key parameters which are used to provide outputs of Δ14C and d13C as a function of time. By optimising the fit of these two outputs with historical records spanning 200 years or more, including during the bomb pulse, the key parameters are determined. The quality of fit of Δ14C and d13C is excellent and the internal parameters optimise at reasonable values. The global flux to and from the effective mixing reservoir, whose size is six times that of the atmosphere, is currently 58 GTC/yr in 2020, not including annually cycled carbon.
Keywords
CO2 residence-time; CO2 lifetime; anthropogenic emissions; global warming
Subject
Environmental and Earth Sciences, Atmospheric Science and Meteorology
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
