• Dendrochronological analysis of 19 Norwegian grain chests 

      Thun, Terje; Svarva, Helene Løvstrand (Journal article; Peer reviewed, 2016)
      Nineteen Norwegian grain chests made of Scots pine (Pinus sylvestris L.) were analyzed by measuring tree-ring widths on photographs and scanned pictures. Seventeen of the chests were successfully dated by dendrochronology. ...
    • Dendroclimatology in southern Norway: tree rings, demography and climate 

      Svarva, Helene Løvstrand (Doctoral theses at NTNU;2019:195, Doctoral thesis, 2019)
      Tree rings provide annually resolved palaeoclimate archives. In southern Norway, time series of tree-ring width and maximum latewood density of Scots pine growing at certain high-elevation locations are correlated to ...
    • Little Ice Age summer temperatures in Western Norway from a 700-year tree-ring chronology 

      Svarva, Helene Løvstrand; Thun, Terje; Kirchhefer, Andreas; Nesje, Atle (Journal article; Peer reviewed, 2018)
      A ring-width Pinus sylvestris chronology from Sogndal in western Norway was created, covering the period AD 1240–2008 and allowing for reconstruction of monthly mean July temperatures. This reconstruction is the first of ...
    • 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 ...
    • 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 ...
    • The construction of a dendro-climatological chronology from west Norway 

      Svarva, Helene Løvstrand (Master thesis, 2009)
    • Tree-ring growth shows that the significant population decline in Norway began before the Black Death 

      Thun, Terje; Svarva, Helene Løvstrand (Journal article; Peer reviewed, 2017)
      The Black Death (1349–1350 in Norway) is often cited as the cause of a severe population decline and building hiatus in the middle of the 14th century. This paper analyses this hypothesis by matching the Black Death with ...