Annual Beech (Fagus sylvatica) Growth Rings and Solar-Related Climate Variations in the Central and Western Balkans in the 18th–21st Centuries

Komitov, B.; Кафтан, В. И.

doi:10.1134/s001679321907017x

Cited by 4 publications

(15 citation statements)

References 18 publications

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“…The extracted calibration functions were used for the extrapolation of climate parameters (temperatures and precipitations) of corresponding regions for the nearest future (until 2045 AD). The corresponding results have been described by Komitov and Kaftan [41].…”

Section: Two Stage Tree Samples Selection Proceduressupporting

confidence: 73%

“…The present work is a continuation of our cited earlier works [39][40][41]. That is why in a significant degree of it is based on results that are already described in the above mentioned manuscripts.…”

supporting

confidence: 53%

“…In the 6 oldest beech samples time series a trend of quasi-periodic type with a period 200 ≤ T ≤ 230 year has been established [41]. All they are from sites in Stara Planina.…”

Section: Preliminary Data Processing and General Trends The~200 Year Cycle In The Longest Beech Tree Ring Widths Data Seriesmentioning

confidence: 99%

“…Another important circumstance is that unlike the other five time series, the phase shifting (delay) of 'Dm' to temperatures and precipitations is negligible for "Gurkovo-01" and "Rositsa-01" (0 to 1 year) [41]. This helps for better and more certain interpretation of the results in relation to climate changes, as well as to "Sun-climate" connection.…”

mentioning

confidence: 93%

“…However, a large part of these descriptions are in the Bulgarian language. Other part from the used there results and their analysis, which relates to seven old beech samples (age ≥ 200 years) are presented of compact type in [41] due to volume limit requirements for the manuscript.…”

mentioning

confidence: 99%

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The European Beech Annual Tree Ring Widths Time Series, Solar–Climatic Relationships and Solar Dynamo Regime Changes

Komitov

2021

Atmosphere

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In this study, the results from the analysis of annual ring widths (‘Dm’) time series of two “very sensitive” to the climate and solar–climate relationships of long lived European beech (Fagus sylvatica) samples (on age of 209 ± 1 and 245 ± 5 years correspondingly) are discussed. Both series are characterized by very good expressed and relating to the solar magnetic Hale cycle 20–22-year oscillations. A good coincidence between the changes of ‘Dm’ and the growth or fading of the solar magnetic cycle is found. The transition effects at the beginning and ending of the grand Dalton (1793–1833) and Gleissberg minima (1898–1933) are very clearly visible in the annual tree ring width data for the one of beech samples. Some of these effects are also detected in the second sample. The problem for the possible “lost” sunspot cycle at the end of 18th century is also discussed. A prediction for a possible “phase catastrophe” during the future Zurich sunspot cycles 26 and 27 between 2035–2040 AD as well as for general precipitation upward and temperature fall tendencies in Central Bulgaria, more essential after 2030 AD, are brought forth.

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Section: Two Stage Tree Samples Selection Proceduressupporting

confidence: 73%

supporting

confidence: 53%

“…In the 6 oldest beech samples time series a trend of quasi-periodic type with a period 200 ≤ T ≤ 230 year has been established [41]. All they are from sites in Stara Planina.…”

Section: Preliminary Data Processing and General Trends The~200 Year Cycle In The Longest Beech Tree Ring Widths Data Seriesmentioning

confidence: 99%

mentioning

confidence: 93%

mentioning

confidence: 99%

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The European Beech Annual Tree Ring Widths Time Series, Solar–Climatic Relationships and Solar Dynamo Regime Changes

Komitov

2021

Atmosphere

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Climate Oscillations in Southern Bulgaria and Solar Activity: Analysis of Annual Rings of Needle Samples

Komitov

Кафтан

2020

Geomagn. Aeron.

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Finding an imprint of solar and climatic cycles in tree rings of European beech (Fagus sylvatica L.)

Šimůnek¹,

Prokůpková²,

Gallo³

2021

J. For. Sci.

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The present study is focused on European beech (Fagus sylvatica L.) growth in eastern Bohemia in the Broumovské stěny National Nature Reserve, Czech Republic. The objective of this research was to develop an evaluation of European beech radial growth in relation to solar activity (number of sunspots), air temperature in the growing season, annual precipitation and air pollution (SO<sub>2</sub> depositions). The highest positive significant correlation coefficient was found between radial growth of European beech and number of sunspots, followed by the correlation with air temperature in the growing season. The radial growth showed a negative significant correlation with SO<sub>2</sub> depositions. The correlation of the radial growth indicates that precipitation and sunspots have a lower correlation coefficient with beech growth than seasonal temperature during an air pollution disaster in the 21st solar cycle. Radial growth, precipitation total and air temperature in the growing season were processed by spectral analysis for the evaluation of periodic cycles. The 7.5- to 11-year cycles were observed in air temperature and in sunspot cycles. Precipitation and air temperature in the growing season indicate a higher frequency at 3.7-year cycles. The long-term periodicity of radial growth was influenced by both solar activity and fluctuations of growing-season air temperature.

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Annual Beech (Fagus sylvatica) Growth Rings and Solar-Related Climate Variations in the Central and Western Balkans in the 18th–21st Centuries

Cited by 4 publications

References 18 publications

The European Beech Annual Tree Ring Widths Time Series, Solar–Climatic Relationships and Solar Dynamo Regime Changes

The European Beech Annual Tree Ring Widths Time Series, Solar–Climatic Relationships and Solar Dynamo Regime Changes

Climate Oscillations in Southern Bulgaria and Solar Activity: Analysis of Annual Rings of Needle Samples

Finding an imprint of solar and climatic cycles in tree rings of European beech (Fagus sylvatica L.)

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