Blar i NTNU Open på forfatter "Svarva, Helene Løvstrand"
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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 ... -
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 ... -
Regional Patterns of Late Medieval and Early Modern European Building Activity Revealed by Felling Dates
Ljungqvist, Fredrik Charpentier; Seim, Andrea; Tegel, Willy; Krusic, Paul J.; Baittinger, Claudia; Belingard, Christelle; Bernabei, Mauro; Bonde, Niels; Borghaerts, Paul; Couturier, Yann; Crone, Anne; van Daalen, Sjoerd; Daly, Aoife; Doeve, Petra; Domínguez-Delmás, Marta; Edouard, Jean-Louis; Frank, Thomas; Ginzler, Christian; Grabner, Michael; Gschwind, Friederike M.; Haneca, Kristof; Hansson, Anton; Herzig, Franz; Heussner, Karl-Uwe; Hofmann, Jutta; Houbrechts, David; Kaczka, Ryszard J.; Kolář, Tomáš; Kontic, Raymond; Kyncl, Tomáš; Labbas, Vincent; Lagerås, Per; Le Digol, Yannick; Le Roy, Melaine; Leuschner, Hanns Hubert; Linderson, Hans; Ludlow, Francis; Marais, Axel; Mills, Coralie M.; Neyses-Eiden, Mechthild; Nicolussi, Kurt; Perrault, Christophe; Pfeifer, Klaus; Rybníček, Michal; Rzepecki, Andreas; Schmidhalter, Martin; Seifert, Mathias; Shindo, Lisa; Spyt, Barbara; Susperregi, Josué; Svarva, Helene Løvstrand; Thun, Terje; Walder, Felix; Ważny, Tomasz; Werthe, Elise; Westphal, Thorsten; Wilson, Rob; Büntgen, Ulf (Peer reviewed; Journal article, 2022)Although variations in building activity are a useful indicator of societal well-being and demographic development, historical datasets for larger regions and longer periods are still rare. Here, we present 54,045 annually ... -
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 ... -
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 ...