Temporal variability in the Holocene marine radiocarbon reservoir effect for the Tropical and South Pacific

Simple item page
dc.contributor.authorHua, Qen_AU
dc.contributor.authorUlm, Sen_AU
dc.contributor.authorYu, Ken_AU
dc.contributor.authorClark, TRen_AU
dc.contributor.authorNothdurft, LDen_AU
dc.contributor.authorLeonard, NDen_AU
dc.contributor.authorPandolfi, JMen_AU
dc.contributor.authorJacobsen, GEen_AU
dc.contributor.authorZhao, JXen_AU
dc.date.accessioned2021-07-28T01:54:19Zen_AU
dc.date.available2021-07-28T01:54:19Zen_AU
dc.date.issued2020-12-01en_AU
dc.date.statistics2021-07-14en_AU
dc.description.abstractUnderstanding the marine radiocarbon reservoir effect (i.e., marine radiocarbon reservoir age (R) and/or correction (ΔR)) is important for the construction of robust radiocarbon chronologies for marine archives for various research areas including archaeology, palaeoecology, paleoceanography, Quaternary research and climate change studies. In this study, we examined temporal ΔR variability for the South China Sea (SCS) and the Great Barrier Reef (GBR) during the past ∼8.1 ka based on 14C analysis of 230Th-dated corals. Results show large ΔR variations of ∼410 yr and ∼490 yr for the SCS and the northern GBR for ∼5.5–8.1 ka and ∼5.5–7 ka, respectively, and a smaller ΔR variability of ∼200 yr for the SCS for ∼2–3.5 ka. Our data, together with those previously published for the Tropical and South Pacific, indicate that variability in ocean upwelling bringing old subsurface waters to the surface and/or changes in the sources (or 14C level) of the upwelled waters are responsible for seeing large ΔR variations in coastal areas along the eastern Pacific and the Tropical East Pacific (TEP) of several hundred to a thousand years mostly during the Early to Middle Holocene. ΔR variations in the central and western Pacific of several and a couple of hundred years during the Middle and Late Holocene, respectively, might be due to variability in Pacific-wide ocean circulation associated with climatic changes controlling the spread of upwelled waters from the TEP to the west. This mechanism together with local/regional effects, such as changes in ocean upwelling in the SCS resulting from East Asian monsoon variability and changes in upwelling and/or horizontal advection in the northern GBR associated with variability in the El Niño Southern Oscillation, might be responsible for the observed ΔR variations in these areas. The results of our study also indicate the need for regional marine radiocarbon calibration curves for improved radiocarbon dating of marine samples as the observed Holocene ΔR values for the Tropical and South Pacific are not fully reproduced by a recent modelling work using a 3D ocean model, which takes into account climate change effects. Ocean circulation changes were included in the model for the period of 11.5–50 cal kyr BP but possibly not considered or not well represented for the Holocene, which might explain the differences between the observed and modelled ΔR values. Crown Copyright©2020 Published by Elsevier Ltden_AU
dc.identifier.articlenumber106613en_AU
dc.identifier.citationHua, Q., Ulm, S., Yu, K., Clark, T. R., Nothdurft, L. D., Leonard, N. D., Pandolfi, J. M., Jacobsen, G. E. & Zhao, J.-X. (2020). Temporal variability in the Holocene marine radiocarbon reservoir effect for the Tropical and South Pacific. Quaternary Science Reviews, 249, 106613. doi:10.1016/j.quascirev.2020.106613en_AU
dc.identifier.issn0277-3791en_AU
dc.identifier.journaltitleQuaternary Science Reviewsen_AU
dc.identifier.urihttps://doi.org/10.1016/j.quascirev.2020.106613en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11130en_AU
dc.identifier.volume249en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectQuaternary perioden_AU
dc.subjectPacific Oceanen_AU
dc.subjectUraniumen_AU
dc.subjectThoriumen_AU
dc.subjectCarbon 14en_AU
dc.subjectWater currentsen_AU
dc.subjectClimatic changeen_AU
dc.subjectCoralsen_AU
dc.titleTemporal variability in the Holocene marine radiocarbon reservoir effect for the Tropical and South Pacificen_AU
dc.typeJournal Articleen_AU
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
1-s2.0-S0277379120305758-main.pdf
Size:
3.37 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.63 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Journal Articles