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Article
Open AccessForest carbon sink neutralized by pervasive growth-lifespan trade-offs
Land vegetation is currently taking up large amounts of atmospheric CO2, possibly due to tree growth stimulation. Extant models predict that this growth stimulation will continue to cause a net carbon uptake this...
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Article
Open AccessMD dating: molecular decay (MD) in pinewood as a dating method
Dating of wood is a major task in historical research, archaeology and paleoclimatology. Currently, the most important dating techniques are dendrochronology and radiocarbon dating. Our approach is based on mo...
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Article
Open AccessAuthor Correction: Solar superstorm of AD 774 recorded subannually by Arctic tree rings
The authors became aware of a mistake in the data displayed in Fig. 1 and Supplementary Table 2 of the original version of the Article. Specifically, the 14C production values were printed out in the code before ...
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Article
Halistatt Cycle Subarctic Fennoscandian Temperature and Its Possible Link with Solar Activity
Reconstruction of summer temperature at subarctic Fennoscandia (68°–70° N, 20°–30° E), based on tree-ring data, was compared with three solar activity reconstructions, obtained by means of 14C and 10Be. It was sh...
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Article
Open AccessSolar superstorm of AD 774 recorded subannually by Arctic tree rings
Recently, a rapid increase in radiocarbon (14C) was observed in Japanese tree rings at AD 774/775. Various explanations for the anomaly have been offered, such as a supernova, a γ-ray burst, a cometary impact, or...
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Article
Open AccessTree height strongly affects estimates of water-use efficiency responses to climate and CO2 using isotopes
Various studies report substantial increases in intrinsic water-use efficiency (W i ), estimated using carbon isotopes in tree rings, suggesting trees ar...
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Article
Oak decline analyzed using intraannual radial growth indices, δ13C series and climate data from a rural hemiboreal landscape in southwesternmost Finland
Decline of pedunculate oak (Quercus robur L.) was studied in SW Finland. This is a region where the species is growing near its northern distributional limit globally and a recent decline of mature trees has been...
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Article
Evaluating direct and indirect evidence of climatic change by Hölder regularity and order pattern in time series
The several competing reconstructions of Northern Hemisphere temperature variability exists with partly conflicting evidence. Here we considered a specific problem of choosing “the best” reconstruction, in a f...
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Article
Unprecedented low twentieth century winter sea ice extent in the Western Nordic Seas since A.D. 1200
We reconstructed decadal to centennial variability of maximum sea ice extent in the Western Nordic Seas for A.D. 1200–1997 using a combination of a regional tree-ring chronology from the timberline area in Fen...
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Article
Quasisecular cyclicity in the climate of the Earth’s Northern Hemisphere and its possible relation to solar activity variations
Paleoclimatological reconstructions of temperature of the Earth’s Northern Hemisphere for the last thousand years have been studied using the up-to-date methods of statistical analysis. It has bee indicated th...
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Article
Oak decline in Helsinki portrayed by tree-rings, climate and soil data
Oak decline has recently been observed in and around Helsinki. Tree-ring widths of pedunculate oak were used to assess pre-mortem growth patterns, their dependence on climatic factors and linkages to soil thic...
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Article
Mikuláš R. and Dronov A., Palaeoichnology—Introduction to the Study of Trace Fossils, Institute of Geology, Academy of Sciences of Czech Republic, Prague, 2006, 122 pp.
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Detection of climate signal in dendrochronological data analysis: a comparison of tree-ring standardization methods
Tree-ring standardization methods were compared. Traditional methods along with the recently introduced approaches of regional curve standardization (RCS) and power-transformation (PT) were included. The diffi...
