• Findings from an in-Depth Annual Tree-Ring Radiocarbon Intercomparison 

      Wacker, Lukas; Scott, Ethel Marian; Bayliss, Alex; Brown, David; Bard, Édouard; Bollhalder, Silvia; Friedrich, Michael; Capano, Manuela; Cherkinsky, Alexander; Chivall, David; Culleton, Brendan J.; Dee, Michael W; Friedrich, Ronny; Hodgins, Gregory W.L.; Hogg, Alan G.; Kennett, Douglas J.; Knowles, Timothy D.; Kuitems, Margot; Lange, Todd E.; Miyake, Fusa; Nadeau, Marie-Josée; Nakamura, Toshio; Naysmith, J.P.; Olsen, Jesper; Omori, Toshihiko; Petchey, Fiona; Philippsen, Bente; Ramsey, Christopher Bronk; Prasad, G.V.A.; Seiler, Martin; Southon, John; Staff, Richard A.; Tuna, Thibaut (Peer reviewed; Journal article, 2020)
      The radiocarbon (14C) calibration curve so far contains annually resolved data only for a short period of time. With accelerator mass spectrometry (AMS) matching the precision of decay counting, it is now possible to ...
    • Gas Ion Source Performance of the EnvironMICADAS at HEKAL Laboratory, Debrecen, Hungary 

      Molnar, Mihaly; Meszaros, Marianna; Janovics, Robert; Major, Istvan; Hubay, Katalin; Buro, Botond; Varga, Tamas; Kertesz, Titanilla; Gergely, Virag; Vas, Adam; Orsovszki, Gergely; Molnar, Anita; Veres, Mihaly; Seiler, Martin; Wacker, Lukas; Jull, A J Timothy (Journal article; Peer reviewed, 2021)
      A coupled accelerator mass spectrometer–gas interface system has been successfully operating at the Hertelendi Laboratory of Environmental Studies, Debrecen, Hungary, since 2013. Over the last 6 years more than 500 gas ...
    • HESSEL de VRIES: RADIOCARBON PIONEER from GRONINGEN 

      Grootes, Pieter Meiert; Van Der Plicht, Hans (Journal article; Peer reviewed, 2021)
      Hessel de Vries contributed to radiocarbon (14C) dating for only one short decade. Yet, his development of proportional CO2 counting greatly facilitated 14C measurements, improved their reproducibility, and lowered both ...
    • Radiocarbon calibration around AD 1900 from Scots pine (Pinus sylvestris) tree rings from northern Norway 

      Svarva, Helene Løvstrand; Grootes, Pieter Meiert; Seiler, Martin; Thun, Terje; Værnes, Einar; Nadeau, Marie-Josée (Journal article; Peer reviewed, 2019)
      To resolve an inconsistency around AD 1895 between radiocarbon (14C) measurements on oak from the British Isles and Douglas fir and Sitka spruce from the Pacific Northwest, USA, we measured the 14C content in single-year ...
    • The Radiocarbon Sample Archive of Trondheim 

      Seiler, Martin Thomas; Grootes, Pieter M; Svarva, Helene Løvstrand; Nadeau, Marie-Josee (Peer reviewed; Journal article, 2023)
      Atmospheric CO2 samples have been collected by the Trondheim Radiocarbon Laboratory since the 1960s. The remaining material from the measurements has been precipitated as CaCO3 and stored in glass containers. We investigated ...
    • RADIOCARBON STEP-COMBUSTION OXIDATION METHOD and FTIR ANALYSIS of TRONDHEIM CaCO<inf>3</inf>PRECIPITATES of ATMOSPHERIC CO<inf>2</inf>SAMPLES: FURTHER INVESTIGATIONS and INSIGHTS 

      Santos, Guaciara M.; Leong, Christopher A.; Grootes, Pieter Meiert; Seiler, Martin Thomas; Svarva, Helene Løvstrand; Nadeau, Marie-Josee (Journal article; Peer reviewed, 2023)
      Eight atmospheric carbon dioxide samples (as calcium carbonate—CaCO3—precipitates) from Lindesnes site (58ºN, 7ºE), belonging to 1963 and 1980 (four samples from each year) and stored at the National Laboratory for Age ...
    • Status Report of the Trondheim Radiocarbon Laboratory 

      Seiler, Martin; Grootes, Pieter Meiert; Haarsaker, John Øystein; Lelu, Sylvie; Rzadeczka-Juga, Izabela; Stene, Sølvi; Svarva, Helene Løvstrand; Thun, Terje; Værnes, Einar; Nadeau, Marie-Josée (Journal article; Peer reviewed, 2019)
      The Trondheim radiocarbon (14C) laboratory has evolved from a traditional radiocarbon decay counting laboratory to an accelerator mass spectrometry (AMS) facility primarily measuring 14C. This evolution required adjustments ...
    • The 1953-1965 rise in atmospheric bomb 14C in central Norway 

      Svarva, Helene Løvstrand; Grootes, Pieter Meiert; Seiler, Martin; Stene, Sølvi; Thun, Terje; Værnes, Einar; Nadeau, Marie-Josée (Journal article; Peer reviewed, 2019)
      Sub-annual measurements, eight increments per year, of cellulose in a Scots pine tree growing in central Norway are presented as a proxy for tropospheric 14CO2 at biweekly to monthly resolution. The results are validated ...
    • Unravelling the history of a venetian antiphonary 

      Rzadeczka-Juga, Izabela; Nadeau, Marie-Josee; Juga, Pjotr; Zurbach, Damaris; Grootes, Pieter M; Svarva, Helene Løvstrand; Seiler, Martin Thomas (Journal article; Peer reviewed, 2023)
      We present the results of a multifaceted study of an antiphonary—liturgical song book—presumably made in Venice in 1607, now in the Ringve, National Music Museum of Norway in Trondheim1. The book is hand-sewn on raised ...