A Short note on marine reservoir age simulations used in INTCAL20.

Butzin, Martin, Heaton, Timothy J, Köhler, Peter and Lohmann, Gerrit (2020) A Short note on marine reservoir age simulations used in INTCAL20. Open Access Radiocarbon, 62 (4). pp. 865-871. DOI 10.1017/RDC.2020.9.

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Beyond ~13.9 cal kBP, the IntCal20 radiocarbon ( 14 C) calibration curve is based upon combining data across a range of different archives including corals and planktic foraminifera. In order to reliably incorporate such marine data into an atmospheric curve, we need to resolve these records into their constituent atmospheric signal and marine reservoir age. We present results of marine reservoir age simulations enabling this resolution, applying the LSG ocean general circulation model forced with various climatic background conditions and with atmospheric radiocarbon changes according to the Hulu Cave speleothem record. Simulating the spatiotemporal evolution of reservoir ages between 54,000 and 10,700 cal BP, we find reservoir ages between 500 and 1400 yr in the low- and mid-latitudes, but also more than 3000 yr in the polar seas. Our results are broadly in agreement with available marine radiocarbon reconstructions, with the caveat that continental margins, marginal seas, or tropical lagoons are not properly resolved in our coarse-resolution model.

Document Type: Article
Keywords: marine reservoir age, modeling
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1017/RDC.2020.9
ISSN: 0033-8222
Projects: PalMod
Date Deposited: 23 Mar 2020 12:50
Last Modified: 08 Jan 2021 11:15
URI: http://oceanrep.geomar.de/id/eprint/49290

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