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Global Peak in Atmospheric Radiocarbon Provides a Potential Definition for the Onset of the Anthropocene Epoch in 1965

Urheber*innen

Turney,  Chris S. M.
External Organizations;

Palmer,  Jonathan
External Organizations;

Maslin,  Mark A.
External Organizations;

Hogg,  Alan
External Organizations;

Fogwill,  Christopher J.
External Organizations;

Southon,  John
External Organizations;

Fenwick,  Pavla
External Organizations;

/persons/resource/ghelle

Helle,  G.
5.2 Climate Dynamics and Landscape Evolution, 5.0 Geoarchives, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Wilmshurst,  Janet M.
External Organizations;

McGlone,  Matt
External Organizations;

Bronk Ramsey,  Christopher
External Organizations;

Thomas,  Zoë
External Organizations;

Lipson,  Mathew
External Organizations;

Beaven,  Brent
External Organizations;

Jones,  Richard T.
External Organizations;

Andrews,  Oliver
External Organizations;

Hua,  Quan
External Organizations;

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Volltexte (frei zugänglich)

3039890.pdf
(Verlagsversion), 2MB

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Zitation

Turney, C. S. M., Palmer, J., Maslin, M. A., Hogg, A., Fogwill, C. J., Southon, J., Fenwick, P., Helle, G., Wilmshurst, J. M., McGlone, M., Bronk Ramsey, C., Thomas, Z., Lipson, M., Beaven, B., Jones, R. T., Andrews, O., Hua, Q. (2018): Global Peak in Atmospheric Radiocarbon Provides a Potential Definition for the Onset of the Anthropocene Epoch in 1965. - Scientific Reports, 8, 3293.
https://doi.org/10.1038/s41598-018-20970-5


Zitierlink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_3039890
Zusammenfassung
Anthropogenic activity is now recognised as having profoundly and permanently altered the Earth system, suggesting we have entered a human-dominated geological epoch, the ‘Anthropocene’. To formally define the onset of the Anthropocene, a synchronous global signature within geological-forming materials is required. Here we report a series of precisely-dated tree-ring records from Campbell Island (Southern Ocean) that capture peak atmospheric radiocarbon (14C) resulting from Northern Hemisphere-dominated thermonuclear bomb tests during the 1950s and 1960s. The only alien tree on the island, a Sitka spruce (Picea sitchensis), allows us to seasonally-resolve Southern Hemisphere atmospheric 14C, demonstrating the ‘bomb peak’ in this remote and pristine location occurred in the last-quarter of 1965 (October-December), coincident with the broader changes associated with the post-World War II ‘Great Acceleration’ in industrial capacity and consumption. Our findings provide a precisely-resolved potential Global Stratotype Section and Point (GSSP) or ‘golden spike’, marking the onset of the Anthropocene Epoch.