Abstract:Dendroclimatic studies were carried out in the experimental stands composed of many tree species situated in the Polish part of the Baltic sea-coast. Increment cores were taken from a 100-years old trees of 2 native species: Norway spruce (Picea abies (L.) Karst.), and Scots pine (Pinus sylvestris L.) and 3 nonnative species: Douglas fir (Pseudotsuga menziesii (Mirb.) Franco), Sitka spruce (Picea sitchensis (Bong.) Carr.) and Silver fir (Abies alba Mill.). Thirty trees of each species were cored. The relations… Show more
“…A number of recent dendroclimatological investigation have analyzed winter (e.g., Popa and Cheval 2007;Zhu et al 2009) or summer mean temperature (e.g., Li et al 2011), maximum and minimum temperature (Wilson and Luckman 2002) and extremes (Battipaglia et al 2010), based on individual single proxy or the so called all-species chronology (multispecies chronologies as the arithmetic mean of these records) (e.g., Büntgen et al 2005;Feliksik and Wilczyński 2009). In this study, we give an insight into the use of composite models, simultaneously using a number of temperature sensitive species and an additional extreme index.…”
Section: Assessment Of Potential For Climate Reconstructionmentioning
This study aims at investigating pre-instrumental tree-ring based winter thermal conditions from Upper Silesia, southern Poland. The Scots pine, pedunculate oak and sessile oak ring widths and the extreme index were used to reconstruct winter mean temperature back to A.D. 1770. The climate response analysis showed that the pine is the most sensitive to February (0.36) and March (0.41) temperature, the oaks were found to be sensitive to the previous December (0.27) and January (0.23) temperature. It was found out that the combination of temperature sensitive species and an additional extreme index in regression can improve the reconstruction, with an emphasis on more reliable reconstruction of extreme values. The elimination of variance reduction and precise reconstruction of actual values of temperature is possible by scaling. The obtained calibration/verification results suggest that, through the application of the long-term composite chronologies a detailed study of the climate variability in Upper Silesia in past centuries can be provided.
“…A number of recent dendroclimatological investigation have analyzed winter (e.g., Popa and Cheval 2007;Zhu et al 2009) or summer mean temperature (e.g., Li et al 2011), maximum and minimum temperature (Wilson and Luckman 2002) and extremes (Battipaglia et al 2010), based on individual single proxy or the so called all-species chronology (multispecies chronologies as the arithmetic mean of these records) (e.g., Büntgen et al 2005;Feliksik and Wilczyński 2009). In this study, we give an insight into the use of composite models, simultaneously using a number of temperature sensitive species and an additional extreme index.…”
Section: Assessment Of Potential For Climate Reconstructionmentioning
This study aims at investigating pre-instrumental tree-ring based winter thermal conditions from Upper Silesia, southern Poland. The Scots pine, pedunculate oak and sessile oak ring widths and the extreme index were used to reconstruct winter mean temperature back to A.D. 1770. The climate response analysis showed that the pine is the most sensitive to February (0.36) and March (0.41) temperature, the oaks were found to be sensitive to the previous December (0.27) and January (0.23) temperature. It was found out that the combination of temperature sensitive species and an additional extreme index in regression can improve the reconstruction, with an emphasis on more reliable reconstruction of extreme values. The elimination of variance reduction and precise reconstruction of actual values of temperature is possible by scaling. The obtained calibration/verification results suggest that, through the application of the long-term composite chronologies a detailed study of the climate variability in Upper Silesia in past centuries can be provided.
“…A positive correlation between precipitation and increments for May until September was also found in the nearby Drahany Highlands (Rybníček et al, 2012), with a similar character of the summer weather, yet with considerably higher precipitation (over 500 mm on average in MarchSeptember). A positive effect of precipitation in summer or one of summer months on the Norway spruce radial increment has been found in many similar studies in Europe (Feliksik et al, 1994;Desplanque et al, 1999;Vitas, 2004;Koprowski and Zielski, 2006;Feliksik and Wilczyński, 2009;Bouriaud and Popa, 2009;Rybníček et al, 2010a;Affolter et al, 2010). A significant positive correlation was also identified in other conifers, for example pine (Szczepanek et al, 2006;Bouriaud and Popa, 2009).…”
Section: Discussionmentioning
confidence: 53%
“…The relations between the climate and the radial increment of spruce has recently been explored in Europe by e.g. Mäkinen et al (2000;, Vitas (2004), Koprowski and Zielski (2006), Saava et al (2006), Feliksik and Wilczyński (2009), Bouriaud and Popa (2009), Rybníček et al (2009;2010a;, Aakala and Kuuluvainen (2011), Affolter et al (2010) and Gryc et al (2011Gryc et al ( , 2012.…”
Abstract:The research was conducted in selected 80-to 110-year-old spruce stands in the southeastern part of the Českomoravská Upland at altitudes from 350 m a.s.l. to 465 m a.s.l. The regional standard tree-ring chronology shows very low increments for years 1974, 1976and 1992 . After 1992 there is a sharp rise in increments with a climax in 1997. Afterwards, increments gradually decrease, reaching minima in 2003 and 2008. The years with low increments were also confirmed by the analysis of negative pointer years when over 80% of the analysed trees responded by a sharp decrease in increment, mainly in years 1976 and 1992. We can usually find values of monthly precipitation or monthly temperature average which can explain or help explain these falls in the radial growth.
“…Bigler et al, 2004;Gray et al, 2004;Muzika et al, 2004;Büntgen et al, 2006;Carrer and Urbinati, 2006;Koprowski and Zielski, 2006;Esper et al, 2007;Büntgen et al, 2007;Čejková and Kolář, 2009;Feliksik and Wilczyński, 2009;Bijak, 2010;Fang et al, 2010;Bošeľa et al, 2011;Bošeľa et al, 2014;Dittmar et al, 2012;Hökkä et al, 2012), and studies using more than two cores or discs are less frequent (e.g. Brienen and Zuidema, 2005;Ďurský et al, 2006;Van Der MaatenTheunissen et al, 2013) because they are costly and destructive.…”
Extracting cores from a tree using an increment borer has been standard practice in dendrochronological studies for a long time. Although empirical rules exist regarding how many samples to take and which methodology to apply, comparatively few studies provide quantification of the similarity of relative tree-ring-widths (TRW) around the stem circumference. The aim of this study was therefore to precisely measure the similarity of standardised TRWs around the stem circumference and to provide objective suggestions for optimal core sampling of Norway spruce (Picea abies Karst. [L.]) and European beech (Fagus sylvatica L.) growing in Central European temperate forests. A large sample of cross-sectional discs was used from Norway spruce and European beech trees growing on various slopes, at different altitudes and biogeographic regions across the Czech Republic and Slovakia. The similarity of TRWs measured in different coring directions was analysed by testing the relativized TRW around the trunk (rTRW). Comparison of rTRWs revealed no significant differences between coring directions, indicating that the relative increment was the same around the radius. The results also showed the high similarity between the rTRWs to be independent of both slope inclination and altitude. Moreover, the reconstruction of proportional tree diameters and basal areas backward in time from one core sample and one measurement of tree diameter (basal area) at the time of sample extraction is possible with reasonable precision.
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