Secular Variation of Δ14C During the Medieval Solar Maximum: A Progress Report

Damon, Paul E.; Eastoe, C. J.; Hughes, M. K.; Kalin, Robert M.; Long, Austin; Peristykh, A. N.

doi:10.1017/s003382220001821x

Cited by 32 publications

(33 citation statements)

References 14 publications

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“…The STD's 49.8 year cycle (near the 0.05 confidence level) may be associated with the 57.9 year periodicity of SSN (correspond to Fourth harmonic of Suess cycle). These periodic signals are also observed and reported by others [18,46,47,51,52]. The important low frequency signals (> 70 y) reported in other studies [33,51], such as the Gleissberg cycle of solar activity (often considered 88 year periodicity) that corresponds to our calculation of SSN's 96 year significant periodicity and Suess cycle (near 200 y) is not clearly detected in our STD.…”

Section: Effects Of Ssn On Tree Ringssupporting

confidence: 88%

“…These fluctuations are present in centurial and decadal time scales [36]. Other researchers have shown that there is good correlation between solar activity and tree rings [18,33,45,47,51,52], and an 11 year cycle was also found with a short lag time in growth ring series in trees [46]. The variation was commonly monitored through indices constructed from SST and air pressure at sea level [42,43].…”

Section: Introductionmentioning

confidence: 99%

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Impact de l’activité solaire, anomalie globale de température de l’air et oscillation décadaire pacifique sur les cernes d’arbres en milieu urbain

Chen

et al. 2007

Ann. For. Sci.

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-A tree ring width chronology developed from 58 samples taken from Chinese pine trees (Pinus tabulaeformis Carr.) growing in Shenyang city was studied to analyze the effects of solar activity, Global Surface Air Temperature Anomalies (GSATA) and the Pacific Decadal Oscillation (PDO) on annual radial growth. An excellent response of tree rings to solar activity and global environmental change was revealed, indicating that these urban Chinese pine trees are a suitable proxy for Sun-Earth system research despite their location in Shenyang, an industrial city. The information derived from annual growth rings of urban Chinese pine trees coincides with records from undisturbed trees in a natural location, and demonstrates significant synchronous response to solar activity in the periodic bands of 5-8, 10-12 and 20-30 years. The wave signal of tree growth was also affected and amplified by the combined effect of the PDO from 1900 to 2004 and GSATA from 1880 to 2004 with a short lag time, revealing 5-8, 11-13, and 20-23 year oscillatory modes. At 20-30 year timescale, Chinese pines validated the strong GSATA influence signal at 20.8 years, and may be the primary cause of the 20 and 23 year periodic waves of tree rings. Shenyang urban tree ring growth also showed high frequency variation (2-4 y) that may be due to low periodicity of solar activity, GSATA, PDO and local climate variations, especially in the 2-4 years band width.urban tree rings / sunspot number / Pacific decadal oscillation / global surface air temperature anomaly / wavelet analysis

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Section: Effects Of Ssn On Tree Ringssupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Impact de l’activité solaire, anomalie globale de température de l’air et oscillation décadaire pacifique sur les cernes d’arbres en milieu urbain

Chen

et al. 2007

Ann. For. Sci.

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“…The periods between 8.1 and 12.4 years were related to solar cycle of 11 years, while the period of 23.0 year was related to the Hale cycle. They suggested that the period of 55.7 years might be related to the fourth harmonic of the Suess cycle as discussed by Damon et al (1997). On the other hand, they suggested that the period of 73.1 years was attributed to the Gleissberg cycle, and the period of 188.6 years was attributed to the Suess cycle of 200 years.…”

Section: Solar Influencesmentioning

confidence: 96%

Araucaria growth response to solar and climate variability in South Brazil

et al. 2018

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Abstract. In this work, the Sun-Earth-climate relationship is studied using tree growth rings of Araucaria angustifolia (Bertol.) O. Kuntze collected in the city of Passo Fundo, located in the state of Rio Grande do Sul (RS), Brazil. These samples were previously studied by Rigozo et al. (2008); however, their main interest was to search for the solar periodicities in the tree-ring width mean time series without interpreting the rest of the periodicities found. The question arises as to what are the drivers related to those periodicities. For this reason, the classical method of spectral analysis by iterative regression and wavelet methods are applied to find periodicities and trends present in each tree-ring growth, in Southern Oscillation Index (SOI), and in annual mean temperature anomaly between the 24 and 44 • S. In order to address the aforementioned question, this paper discusses the correlation between the growth rate of the tree rings with temperature and SOI. In each tree-ring growth series, periods between 2 and 7 years were found, possibly related to the El Niño/La Niña phenomena, and a ∼ 23-year period was found, which may be related to temperature variation. These novel results might represent the tree-ring growth response to local climate conditions during its lifetime, and to nonlinear coupling between the Sun and the local climate variability responsible to the regional climate variations.

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“…Variability of the 14 C Correspondence to: V. A. Dergachev (v.dergachev@pop.ioffe.rssi.ru) concentration is proved by experimental research, see (e.g. Damon et al, 1998;Kromer et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

The ~ 2400-year cycle in atmospheric radiocarbon concentration: bispectrum of 14C data over the last 8000 years

Vasiliev¹,

Dergachev

2002

Ann. Geophys.

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Abstract. We have carried out power spectrum, time-spectrum and bispectrum analyses of the long-term series of the radiocarbon concentrations deduced from measurements of the radiocarbon content in tree rings for the last 8000 years. Classical harmonic analysis of this time series shows a number of periods: 2400, 940, 710, 570, 500, 420, 360, 230, 210 and 190 years. A principle feature of the time series is the long period of ∼ 2400 years, which is well known. The lines with periods of 710, 420 and 210 years are found to be the primary secular components of power spectrum. The complicated structure of the observed power spectrum is the result of ∼ 2400-year modulation of primary secular components. The modulation induces the appearance of two side lines for every primary one, namely lines with periods of 940 and 570 years, of 500 and 360 years, and 230 and 190 years. The bispectral analysis shows that the parameters of carbon exchange system varied with the ∼ 2400-year period during the last 8000 years. Variations of these parameters appear to be a climate effect on the rate of transfer of 14 C between the atmosphere and the the ocean.

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Secular Variation of Δ¹⁴C During the Medieval Solar Maximum: A Progress Report

Cited by 32 publications

References 14 publications

Impact de l’activité solaire, anomalie globale de température de l’air et oscillation décadaire pacifique sur les cernes d’arbres en milieu urbain

Impact de l’activité solaire, anomalie globale de température de l’air et oscillation décadaire pacifique sur les cernes d’arbres en milieu urbain

Araucaria growth response to solar and climate variability in South Brazil

The ~ 2400-year cycle in atmospheric radiocarbon concentration: bispectrum of <sup>14</sup><i>C</i> data over the last 8000 years

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Secular Variation of Δ14C During the Medieval Solar Maximum: A Progress Report

Cited by 32 publications

References 14 publications

Impact de l’activité solaire, anomalie globale de température de l’air et oscillation décadaire pacifique sur les cernes d’arbres en milieu urbain

Impact de l’activité solaire, anomalie globale de température de l’air et oscillation décadaire pacifique sur les cernes d’arbres en milieu urbain

Araucaria growth response to solar and climate variability in South Brazil

The ~ 2400-year cycle in atmospheric radiocarbon concentration: bispectrum of &lt;sup&gt;14&lt;/sup&gt;&lt;i&gt;C&lt;/i&gt; data over the last 8000 years

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Secular Variation of Δ¹⁴C During the Medieval Solar Maximum: A Progress Report

The ~ 2400-year cycle in atmospheric radiocarbon concentration: bispectrum of <sup>14</sup><i>C</i> data over the last 8000 years