Sunspot area as unexplored trend inside radial growth of European beech in Krkonoše Mountains: a forest science from different perspective

Šimůnek, Václav; Sharma, Ram P.; Vacek, Zdeněk; Vacek, Stanislav; Hůnová, Iva

doi:10.1007/s10342-020-01302-7

Cited by 21 publications

(15 citation statements)

References 82 publications

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“…Tree rings of beech in the Apennines are associated with the NAO [51], and even the NAO is influenced by the solar cycle [37,49]. It is also important to mention that there is a link between fluctuations in the radial growth of European beech in the mountains of the northeast Czech Republic and solar activity [52,53]. Some research in the field of dendrochronology proves the influence of solar cycles on the radial growth of trees, which is well described by research from northwestern Russia [54,55], Chile [56] and the Tibetan Plateau [57].…”

Section: Introductionmentioning

confidence: 99%

“…The first time period (1st period) indicates the phase of man-managed stands of European beech. The second time period (2nd period) indicates the air pollution calamity on research plots in the Czech Republic [23,52], and the same time period was also marked out for Italian research plots in order to maintain comparability of time periods. The third time period (3rd period) denotes the phase without human harvesting interventions, when the beech stands developed naturally and spontaneously.…”

Section: Introductionmentioning

confidence: 99%

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Tree Rings of European Beech (Fagus sylvatica L.) Indicate the Relationship with Solar Cycles during Climate Change in Central and Southern Europe

Šimůnek

Vacek

et al. 2021

Forests

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The impact of solar cycles on forest stands, while important in the development of the forest environment during climate change, has not yet been sufficiently researched. This work evaluates the radial growth of European beech (Fagus sylvatica L.) in the mountain areas of southern Italy and central Europe (Czech Republic, Poland) in correlation to solar cycles (sunspot number), extreme climatic events, air temperatures and precipitation totals. This research is focused on the evaluation of the radial growth of beech (140 dendrochronological samples with 90–247 years of age) from 1900 to 2019. The time span was divided into the following three periods: 1) a period of regular harvesting (1900–1969), 2) a period of air pollution crisis (1970–1985) and 3) a period of forest protection (1986–2019). The results indicate that the solar cycle was significantly involved in radial growth on all research plots. With regard to the evaluated precipitation totals, seasonal temperatures and the sunspot number, the latter was the most significant. Temperatures had a positive effect and precipitation had a negative effect on the radial increment of beech in central Europe, while in southern Italy, the effect of temperature and precipitation on the increment is reversed. In general, the limiting factor for beech growth is the lack of precipitation during the vegetation season. The number of negative pointer years (NPY) with an extremely low increment rose in relation to the decreasing southward latitude and the increasing influence of climate change over time, while a higher number of NPY was found in nutrient-richer habitats compared to nutrient-poorer ones. Precipitation and temperature were also reflected in the cyclical radial growth of European beech. The relationship between solar cycles and the tree ring increment was reversed in southern Italy and central Europe in the second and third (1970–2019) time periods. In the first time period (1900–1969), there was a positive relationship of the increment to solar cycles on all research plots. In the tree rings of European beech from southern Italy and central Europe, a relationship to the 11-year solar cycle has been documented. This study will attempt to describe the differences in beech growth within Europe, and also to educate forest managers about the relevant influence of solar cycles. Solar activity can play an important role in the growth of European beech in central and southern Europe, especially during the recent years of global climate change.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tree Rings of European Beech (Fagus sylvatica L.) Indicate the Relationship with Solar Cycles during Climate Change in Central and Southern Europe

Šimůnek

Vacek

et al. 2021

Forests

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“…It is interesting also to note some extremely powerful SEP events in the past (most probably near to 11 year sunspot maxima epochs), which seriously affected the GCR -flux during the corresponding calendar epochs (in 665-663 BC, 775 AD, and 993 AD). They are detected on the basis of high precise mass-spectrometric measurements of 14 C tree rings concentrations [75][76][77].…”

Section: Discussionmentioning

confidence: 99%

“…Relative new dendrochrinological studies, which are oriented to "Sun-climate" problematic have been published by Rasspopov et.al [5], Wang et al [6] and well as Shumilov et al [7]. It needs to be especially noted there a large number of studies from the last~20 years, which relate to the European beech or pinopsida samples and in many of them, in light of "Sun-climate" connection [8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

“…A large number of epochs by typical duration from 2-3 to few decades when the sunspot (~11 year) Schwabe-Wolf's cycles are characterized by relatively low or very low amplitudes (grand sunspot minima). They have been detected during the last~10,000 years (the postglacial Holocene epoch) on the basis of time series analysis over so called "historical" indirect data sets such as the Schove's series [2,3], the "cosmogenic" isotopes (mainly 14 C and 10 Be) series [15][16][17][18][19][20], the naked eye visible giant sunspots, and/or sunspot groups [21], and so forth. They are related according to the viewpoint of many authors, namely to the quasi secular multiplet of oscillations by duration in the range of 50-120 years, where the 80-90 year Gleissberg cycle [22] is only one of them [23,24], the bi-centurial 170-230 year (the Vries/Suess) cycle [16], the 2200-2500 year (Hallstadt) cycle [18], as well as other oscillations in the super centurial or super millennial range.…”

Section: Introductionmentioning

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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Afforestation suitability and production potential of five tree species on abandoned farmland in response to climate change, Czech Republic

Vacek

Bílek

Remeš

et al. 2022

Trees

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Sunspot area as unexplored trend inside radial growth of European beech in Krkonoše Mountains: a forest science from different perspective

Cited by 21 publications

References 82 publications

Tree Rings of European Beech (Fagus sylvatica L.) Indicate the Relationship with Solar Cycles during Climate Change in Central and Southern Europe

Tree Rings of European Beech (Fagus sylvatica L.) Indicate the Relationship with Solar Cycles during Climate Change in Central and Southern Europe

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

Afforestation suitability and production potential of five tree species on abandoned farmland in response to climate change, Czech Republic

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