Radiocarbon; Stable Isotopes; Palaeoclimatology; Dendrochronology; Greenland Stadial 1; Late Glacial; Early Holocene; AMS; Younger Dryas; Environmental Archive
Wacker L., Bollhalder S., Sookdeo A., Synal H.-A. (2019), Re-evaluation of the New Oxalic Acid standard with AMS, in Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and
, in press.
Pauly Maren, Helle Gerhard, Miramont Cécile, Büntgen Ulf, Treydte Kerstin, Reinig Frederick, Guibal Frédéric, Sivan Olivier, Heinrich Ingo, Riedel Frank, Kromer Bernd, Balanzategui Daniel, Wacker Lukas, Sookdeo Adam, Brauer Achim (2018), Subfossil trees suggest enhanced Mediterranean hydroclimate variability at the onset of the Younger Dryas, in Scientific Reports
, 8(1), 13980-13980.
Reinig Frederick, Gärtner Holger, Crivellaro Alan, Nievergelt Daniel, Pauly Maren, Schweingruber Fritz, Sookdeo Adam, Wacker Lukas, Büntgen Ulf (2018), Introducing anatomical techniques to subfossil wood, in Dendrochronologia
, 52, 146-151.
Reinig Frederick, Nievergelt Daniel, Esper Jan, Friedrich Michael, Helle Gerhard, Hellmann Lena, Kromer Bernd, Morganti Sandro, Pauly Maren, Sookdeo Adam, Tegel Willy, Treydte Kerstin, Verstege Anne, Wacker Lukas, Büntgen Ulf (2018), New tree-ring evidence for the Late Glacial period from the northern pre-Alps in eastern Switzerland, in Quaternary Science Reviews
, 186, 215-224.
Lendvay Bertalan, Hartmann Martin, Brodbeck Sabine, Nievergelt Daniel, Reinig Frederick, Zoller Stefan, Parducci Laura, Gugerli Felix, Büntgen Ulf, Sperisen Christoph (2018), Improved recovery of ancient DNA from subfossil wood - application to the world's oldest Late Glacial pine forest, in New Phytologist
, 217(4), 1737-1748.
Sookdeo Adam, Wacker Lukas, Fahrni Simon, McIntyre Cameron P, Friedrich Michael, Reinig Frederick, Nievergelt Daniel, Tegel Willy, Kromer Bernd, Büntgen Ulf (2017), Speed Dating: A Rapid Way to Determine the Radiocarbon Age of Wood by EA-AMS, in Radiocarbon
, 59(3), 933-939.
Hogg Alan, Southon John, Turney Chris, Palmer Jonathan, Ramsey Christopher Bronk, Fenwick Pavla, Boswijk Gretel, Buntgen Ulf, Friedrich Michael, Helle Gerhard, Hughen Konrad, Jones Richard, Kromer Bernd, Noronha Amexandra, Reinig Frederick, Reynard Linda, Staff Richard, Wacker Luckas (2016), Decadally Resolved Lateglacial Radiocarbon Evidence from New Zealand Kauri–CORRIGENDUM, in Radiocarbon
, 58(4), 947-947.
Hogg Alan, Southon John, Turney Chris, Palmer Jonathan, Bronk Ramsey Christopher, Fenwick Pavla, Boswijk Gretel, Friedrich Michael, Helle Gerhard, Hughen Konrad, Jones Richard, Kromer Bernd, Noronha Alexandra, Reynard Linda, Staff Richard, Wacker Lukas (2016), Punctuated Shutdown of Atlantic Meridional Overturning Circulation during Greenland Stadial 1, in Scientific Reports
, 6(1), 25902-25902.
SookdeoAdam, KromerBernd, BüntgenUlf, FriedrichMichael, FriedrichRonny, HelleGerd, PaulyMaren, NievergeltDaniel, ReinigFrederick, TreydteKerstin, SynalHans-Arno, WackerLukas, Quality Dating: A well-defined protocol for quality high-precision 14C-dates tested on Late Glacial wood, in Radiocarbon
Annually resolved and absolutely dated tree-ring chronologies are important paleo-environmental proxy archives, because they can cover several thousands of years and robust master chronologies are available for many different regions around the globe. Moreover, the unique dating accuracy has a strong impact on many fields of application, including paleoclimatology and paleoecology, but also archaeology and radiocarbon dating. Here, we strive to a) consolidate and b) extend the worldwide longest continuous tree-ring width chronology from Hohenheim/Zurich, which currently reaches back to 12 594 before present (BP). An exceptional discovery of 257 individual pine trees within the town of Zurich in 2013 (herein referred to as the Binz material), for which first radiocarbon dates now suggest a time window roughly between 14 000 and 12 1000 BP, implies strong evidence to fill the existing gaps in the Late Glacial tree-ring chronology around 12 600 BP. If indeed successful, the worldwide longest, absolutely dated and continuous tree-ring record would be extended by almost two millennia until around 14 300 BP, thus covering a particularly interesting climatological transition from the Last Ice Age into the Early Holocene - a period for which proxy evidence is generally scarce. Achieving this remarkable task, however, requires joint forces across an international Swiss-German collaboration, which will in addition to ample new dendrochronological ring width and density measurements also generate a unique record of corresponding high-resolution radiocarbon (¹4C) dates as well as stable isotope ratios (d¹³C and d¹8O). The herein proposed multi-parameter approach will not only support and strengthen the chronology development process typically based on ring width measurements alone, but particularly also our palaeoenvironmental understanding of the Late Glacial period surrounding the Younger Dryas, a period during which rapid climatic shifts likely provide a natural analogue to the most recent anthropogenic change.The new multi-parameter tree-ring archive will further allow extending the highly rewarded (tree-ring-based) terrestrial radiocarbon calibration curve for more than 2 000 years into late glacial times improving considerably radiocarbon dating accuracy for archaeologists and geological sciences. In combination with several available marine radiocarbon records and complementary radioisotopic records from polar ice cores (¹°Be, ³6Cl), an exceptionally precise and highly resolved calibration curve will also reveal historical information about changes in and levels of solar activity, as well as mounting evidence for trends and extremes at the putative transition of generally colder to warmer climatic conditions, associated with rapid changes in the Earth’s hydrological cycle. In addition, decadal to centennial ¹4C variations in tree-rings will be compared to the mirror image of ¹°Be in polar ice cores, therefore anchoring the ice core time scale to the tree-ring scale. Employment of the proposed high-resolution stable isotopes (d¹³C and d¹8O) from the same trees will further help us to more accurately capture the full range of synaptic-scale late glacial temperature and likely even also precipitation variability.