Search

Your search keyword '"Jacobsen, Geraldine"' showing total 12 results
Start Over Author "Jacobsen, Geraldine" Journal radiocarbon
12 results on '"Jacobsen, Geraldine"'

1. AUSTRALIAN MARINE RADIOCARBON RESERVOIR EFFECTS: ΔR ATLAS AND ΔR CALCULATOR FOR AUSTRALIAN MAINLAND COASTS AND NEAR-SHORE ISLANDS

Author

Ulm, Sean, primary, O’Grady, Damien, additional, Petchey, Fiona, additional, Hua, Quan, additional, Jacobsen, Geraldine, additional, Linnenlucke, Lauren, additional, David, Bruno, additional, Rosendahl, Daniel, additional, Bunbury, Magdalena M E, additional, Bird, Michael I, additional, and Reimer, Paula J, additional

Published
2023
Full Text
View/download PDF

2. THE APPLICATION OF POLLEN RADIOCARBON DATING AND BAYESIAN AGE-DEPTH MODELING FOR DEVELOPING ROBUST GEOCHRONOLOGICAL FRAMEWORKS OF WETLAND ARCHIVES

Author

Cadd, Haidee, primary, Sherborne-Higgins, Bryce, additional, Becerra-Valdivia, Lorena, additional, Tibby, John, additional, Barr, Cameron, additional, Forbes, Matt, additional, Cohen, Tim J, additional, Tyler, Jonathan, additional, Vandergoes, Marcus, additional, Francke, Alexander, additional, Lewis, Richard, additional, Arnold, Lee J, additional, Jacobsen, Geraldine, additional, Marjo, Chris, additional, and Turney, Chris, additional

Published
2022
Full Text
View/download PDF

3. RADIOCARBON PROTOCOLS AND FIRST INTERCOMPARISON RESULTS FROM THE CHRONOS 14CARBON-CYCLE FACILITY, UNIVERSITY OF NEW SOUTH WALES, SYDNEY, AUSTRALIA

Author

Turney, Chris, primary, Becerra-Valdivia, Lorena, additional, Sookdeo, Adam, additional, Thomas, Zoë A, additional, Palmer, Jonathan, additional, Haines, Heather A, additional, Cadd, Haidee, additional, Wacker, Lukas, additional, Baker, Andy, additional, Andersen, Martin S, additional, Jacobsen, Geraldine, additional, Meredith, Karina, additional, Chinu, Khorshed, additional, Bollhalder, Silvia, additional, and Marjo, Christopher, additional

Published
2021
Full Text
View/download PDF

4. RADIOCARBON PROTOCOLS AND FIRST INTERCOMPARISON RESULTS FROM THE CHRONOS 14CARBON-CYCLE FACILITY, UNIVERSITY OF NEW SOUTH WALES, SYDNEY, AUSTRALIA.

Author

Turney, Chris, Becerra-Valdivia, Lorena, Sookdeo, Adam, Thomas, Zoë A, Palmer, Jonathan, Haines, Heather A, Cadd, Haidee, Wacker, Lukas, Baker, Andy, Andersen, Martin S, Jacobsen, Geraldine, Meredith, Karina, Chinu, Khorshed, Bollhalder, Silvia, and Marjo, Christopher

Abstract

The Chronos 14Carbon-Cycle Facility is a new radiocarbon laboratory at the University of New South Wales, Australia. Built around an Ionplus 200 kV MIni-CArbon DAting System (MICADAS) Accelerator Mass Spectrometer (AMS) installed in October 2019, the facility was established to address major challenges in the Earth, Environmental and Archaeological sciences. Here we report an overview of the Chronos facility, the pretreatment methods currently employed (bones, carbonates, peat, pollen, charcoal, and wood) and results of radiocarbon and stable isotope measurements undertaken on a wide range of sample types. Measurements on international standards, known-age and blank samples demonstrate the facility is capable of measuring 14C samples from the Anthropocene back to nearly 50,000 years ago. Future work will focus on improving our understanding of the Earth system and managing resources in a future warmer world. [ABSTRACT FROM AUTHOR]

Published
2021
Full Text
View/download PDF

7. The Radiocarbon Ages of Different Organic Components in the Mires of Eastern Australia.

Author

Martin, Len, Goff, James, Jacobsen, Geraldine, and Mooney, Scott

Abstract

Radiocarbon (14C) dating is widely used to determine the age of organic material in palaeoenvironmental research. Here we compare 14C dates (n=17) resulting from macro-charcoal (>250 μm), short-lived plant macrofossils and pollen-rich residues isolated from two mire environments in eastern Australia. In most samples we found that short-lived plant macrofossils were the youngest organic component, the charcoal samples most often fell into the middle and the pollen-rich residues consistently returned older dates than the other samples. Although pollen-rich residues have been widely used for 14C dating in Australasia we suggest some caution in their use, perhaps because in our fire-prone environments these samples often also contain fine charcoal and other oxidative resistant organic matter that is older than the surrounding sediment matrix. The macro-charcoal samples also often returned older calibrated ages compared to short-lived plant macrofossils from the same depth, although this difference was relatively small (<245 years). Our results demonstrate that 14C dating of short-lived plant macrofossils are likely to yield more accurate chronologies and we advocate their routine use in palaeoenvironmental research when they are available. [ABSTRACT FROM AUTHOR]

Published
2019
Full Text
View/download PDF

11. The Antares AMS Centre: A Status Report

Author

Tuniz, Claudio, primary, Fink, David, additional, Hotchkis, Michael, additional, Jacobsen, Geraldine, additional, Lawson, Ewan, additional, Smith, Andrew, additional, Hua, Quan, additional, Drewer, Peter, additional, Lee, Peter, additional, Levchenko, Vladimir, additional, Bird, Roger, additional, Boldeman, John, additional, Barbetti, Mike, additional, Taylor, Gillian, additional, and Head, John, additional

Published
1995
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results