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Cross-dating tree-ring series of living European beech by isochronic weather records

Denisa Sedmáková
Denisa Sedmáková
, 
Róbert Sedmák
Róbert Sedmák
, 
Michal Bosel’a
Michal Bosel’a
, 
Marek Ježík
Marek Ježík
, 
Roman Sitko
Roman Sitko
, 
Tomáš Hlásny
Tomáš Hlásny
 and 
Miroslav Blaženec
Miroslav Blaženec
   | May 20, 2016
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Article Category: Research Article
Published Online: May 20, 2016
Page range: 48 - 58
Received: Feb 02, 2015
Accepted: Jan 22, 2016
DOI: https://doi.org/10.1515/geochr-2015-0030
Keywords
© 2016 D. Sedmáková et al
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Location of Slovakia in CE Europe, enlargement of the study area and location of the two study sites Predná Poľana (dataset PP) and Zadná Poľana (dataset ZP), © EEA, Copenhagen, 2012.
Location of Slovakia in CE Europe, enlargement of the study area and location of the two study sites Predná Poľana (dataset PP) and Zadná Poľana (dataset ZP), © EEA, Copenhagen, 2012.

Interpolated CRU TS3.21 mean temperature data (solid line) to the point of the meteorological station Sliač compared to mean SHMI (Slovak Hydrometeorological Institute) temperature data (dashed line). JJA (June, July and August) temperature was calculated as arithmetic mean of monthly mean temperatures.
Interpolated CRU TS3.21 mean temperature data (solid line) to the point of the meteorological station Sliač compared to mean SHMI (Slovak Hydrometeorological Institute) temperature data (dashed line). JJA (June, July and August) temperature was calculated as arithmetic mean of monthly mean temperatures.

Monthly circumference increments (%) of beech trees at PP as measured with dendrometers during the vegetation periods 2007–2013. 50% (38–59%) of annual increment is produced in July and near by 100% (93–98%) of the annual increment is produced from June, July and August.
Monthly circumference increments (%) of beech trees at PP as measured with dendrometers during the vegetation periods 2007–2013. 50% (38–59%) of annual increment is produced in July and near by 100% (93–98%) of the annual increment is produced from June, July and August.

Interpolated CRU TS3.21 mean JJA temperature series and indexed chronology for the PP site; a) arrows indicate a one-year shift in the chronology when comparing the cross-dating of the same material with the common graphical method (PP-common; Rbar = 0.408, EPS = 0.884) and with the proposed combined dating method (PP-combined; Rbar = 0.479, EPS = 0.902); there is an agree-ment between cross-dating by both methods up to approximately 1956 from there on, discrepancies in dating are evident. b) Comparison of indexed chronology for the PP site established by two independent dendrochronologists through appli-cation of the combined dating method (PP-combined-independent; Rbar = 0.482, EPS = 0.903).
Interpolated CRU TS3.21 mean JJA temperature series and indexed chronology for the PP site; a) arrows indicate a one-year shift in the chronology when comparing the cross-dating of the same material with the common graphical method (PP-common; Rbar = 0.408, EPS = 0.884) and with the proposed combined dating method (PP-combined; Rbar = 0.479, EPS = 0.902); there is an agree-ment between cross-dating by both methods up to approximately 1956 from there on, discrepancies in dating are evident. b) Comparison of indexed chronology for the PP site established by two independent dendrochronologists through appli-cation of the combined dating method (PP-combined-independent; Rbar = 0.482, EPS = 0.903).

Indexed chronologies for the ZP site compared to a) a mean JJA temperature series, and b) to inde-pendent reference chronology from Dittmar et al. (2003).
Indexed chronologies for the ZP site compared to a) a mean JJA temperature series, and b) to inde-pendent reference chronology from Dittmar et al. (2003).

Indexed mean series for VP site compared to a) a mean JJA precipitation series, and b) to an independent reference chronology from Dittmar et al. (2003). The green curve in (a) shows 30-year running correlations between mean series (VP site) and JJA precipitation sum records reaching on aver-age r = 0.5 with a range of values from 0.61 to 0.29 (at the end of the series).
Indexed mean series for VP site compared to a) a mean JJA precipitation series, and b) to an independent reference chronology from Dittmar et al. (2003). The green curve in (a) shows 30-year running correlations between mean series (VP site) and JJA precipitation sum records reaching on aver-age r = 0.5 with a range of values from 0.61 to 0.29 (at the end of the series).

a) Common beech TRW series 7_12 (on top) and established mean chronology (below), (TRW in 1/100 mm); b) since it was impossible to identify the true number of rings with a digital positiometer, micro-sections were used to verify the correct number of rings in problematic seg-ments of the core; within a distance of about 1.5 mm eight micro-rings were detected; TRW —tree ring width, scale 200 μm; c) beech tree of about 120 years old (pith age at coring height) with a diameter of 19 cm and a height of 19.5 m experienced repeated growth depressions lasting for about 5 years.
a) Common beech TRW series 7_12 (on top) and established mean chronology (below), (TRW in 1/100 mm); b) since it was impossible to identify the true number of rings with a digital positiometer, micro-sections were used to verify the correct number of rings in problematic seg-ments of the core; within a distance of about 1.5 mm eight micro-rings were detected; TRW —tree ring width, scale 200 μm; c) beech tree of about 120 years old (pith age at coring height) with a diameter of 19 cm and a height of 19.5 m experienced repeated growth depressions lasting for about 5 years.

Basic descriptive statistics of the raw European beech tree-ring site chronologies.

Dataset

PP — site Predná Poľana, ZP — site Zadná Poľana, VP — site Veľké Pole

Period

Period and length of chronology with sample depth over 4 series; TRW — tree-ring width (1/100 mm); N — number of series, in parenthesis mean number of series in chronology; SD — standard deviation; AC(1) — 1st order autocorrelation; GLK% — coefficient of coincidence Gleichläufigkeit; MSc% — mean sensitivity of the chronology; MSs% — mean sensitivity of individual series in %; R-bar — series inter-correlation; EPS — expressed population signal.

 Length		TRW Mean Min-MaxNSDAC(1)GLK%MSs% Mean Min-MaxMSc%R-barEPS
PP1940–20122471171.50.357934270.480.90
7391–383(10)26–53
ZP1857–20121481050.40.567738270.560.92
15645–302(9)34–50
VP1957–20142101352.40.218231260.480.92
5878–328(13)26–37
eISSN:
1897-1695
Language:
English
Publication timeframe:
Volume Open
Journal Subjects:
Geosciences, other
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