RADIOCARBON IN GLOBAL TROPOSPHERIC CARBON DIOXIDE. Issue 4 (23rd August 2022)

• Record Type: Journal Article
• Authors: Levin, Ingeborg; Hammer, Samuel; Kromer, Bernd; Preunkert, Susanne; Weller, Rolf; Worthy, Douglas E
• Is Part Of: Radiocarbon. Volume 64:Issue 4(2022)
• Page Start: 781
• Page End: 791
• Publication Date: 2022-08-23
• Subjects: anthropogenic 14CO2 perturbations -- bomb radiocarbon -- global carbon cycle -- tropospheric 14CO2 data; Radiocarbon dating -- Periodicals; 930.1028505
• DOI: 10.1017/RDC.2021.102
• Languages: English
• ISSNs: 0033-8222

Abstract

ABSTRACT: Since the 1950s, observations of radiocarbon ( 14 C) in tropospheric carbon dioxide (CO2 ) have been conducted in both hemispheres, documenting the so-called nuclear "bomb spike" and its transfer into the oceans and the terrestrial biosphere, the two compartments permanently exchanging carbon with the atmosphere. Results from the Heidelberg global network of Δ 14 C-CO2 observations are revisited here with respect to the insights and quantitative constraints they provided on these carbon exchange fluxes. The recent development of global and hemispheric trends of Δ 14 C-CO2 are further discussed in regard to their suitability to continue providing constraints for 14 C-free fossil CO2 emission changes on the global and regional scale.