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

Vasiliev, S. S.; Dergachev, V. A.

doi:10.5194/angeo-20-115-2002

Cited by 92 publications

(70 citation statements)

References 32 publications

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“…A 2000-2400-year cycle is also noticeable in radiocarbon data series (see, e.g., Vitinsky et al 1986;Damon and Sonett 1991;Vasiliev and Dergachev 2002).…”

Section: ≈2400-years Hallstatt Cyclementioning

confidence: 99%

“…Sometimes variations with a characteristic time of 600-700 years or 1000-1200 years are discussed (e.g., Vitinsky et al 1986;Sonett and Finney 1990;Vasiliev and Dergachev 2002;Steinhilber et al 2012;Abreu et al 2012), but they are intermittent and can hardly be regarded as a typical feature of solar activity. Sometimes it is called Eddy cycle ).…”

Section: Millennial Eddy Cyclementioning

confidence: 99%

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A history of solar activity over millennia

Usoskin

2017

Living Rev Sol Phys

391

241

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Presented here is a review of present knowledge of the long-term behavior of solar activity on a multi-millennial timescale, as reconstructed using the indirect proxy method. The concept of solar activity is discussed along with an overview of the special indices used to quantify different aspects of variable solar activity, with special emphasis upon sunspot number. Over long timescales, quantitative information about past solar activity can only be obtained using a method based upon indirect proxies, such as the cosmogenic isotopes 14 C and 10 Be in natural stratified archives (e.g., tree rings or ice cores). We give an historical overview of the development of the proxy-based method for past solar-activity reconstruction over millennia, as well as a description of the modern state. Special attention is paid to the verification and cross-calibration of reconstructions. It is argued that this method of cosmogenic isotopes makes a solid basis for studies of solar variability in the past on a long timescale (centuries to millennia) during the Holocene. A separate section is devoted to reconstructions of strong solar energetic-particle (SEP) events in the past, that suggest that the present-day average SEP flux is broadly consistent with estimates on longer timescales, and that the occurrence of extra-strong events is unlikely. Finally, the main features of the long-term evolution of solar magnetic activity, including the

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“…A 2000-2400-year cycle is also noticeable in radiocarbon data series (see, e.g., Vitinsky et al 1986;Damon and Sonett 1991;Vasiliev and Dergachev 2002).…”

Section: ≈2400-years Hallstatt Cyclementioning

confidence: 99%

Section: Millennial Eddy Cyclementioning

confidence: 99%

A history of solar activity over millennia

Usoskin

2017

Living Rev Sol Phys

391

241

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“…It is related to the so-called Hallstatt cycle that is known in Δ 14 C (e.g., Damon & Sonett 1991;Vasiliev & Dergachev 2002;Ma 2007), but has been poorly documented until now in the 10 Be data (McCracken et al 2011;Hanslmeier et al 2013). We also note that the The color code gives the value of the coherence from 0 (blue) to 1 (red).…”

Section: Common Signature Of the Hallstatt Cyclementioning

confidence: 99%

“…3C, although it was not explicitly characterized. This Hallstatt cycle has so far either been ascribed to climate variability (Vasiliev & Dergachev 2002) or to geomagnetic fluctuations, particularly geomagnetic pole migration (Vasiliev et al 2012). However, the fact that the signal we found is in phase and of the same magnitude in the two cosmogenic isotope reconstruction implies that it can hardly be of climatic origin.…”

Section: Common Signature Of the Hallstatt Cyclementioning

confidence: 99%

Solar activity during the Holocene: the Hallstatt cycle and its consequence for grand minima and maxima

Usoskin

Gallet

Lopes

et al. 2016

A&A

136

183

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Aims. Cosmogenic isotopes provide the only quantitative proxy for analyzing the long-term solar variability over a centennial timescale. While essential progress has been achieved in both measurements and modeling of the cosmogenic proxy, uncertainties still remain in the determination of the geomagnetic dipole moment evolution. Here we aim at improving the reconstruction of solar activity over the past nine millennia using a multi-proxy approach. Methods. We used records of the 14 C and 10 Be cosmogenic isotopes, current numerical models of the isotope production and transport in Earth's atmosphere, and available geomagnetic field reconstructions, including a new reconstruction relying on an updated archeo-and paleointensity database. The obtained series were analyzed using the singular spectrum analysis (SSA) method to study the millennial-scale trends. Results. A new reconstruction of the geomagnetic dipole field moment, referred to as GMAG.9k, is built for the last nine millennia. New reconstructions of solar activity covering the last nine millennia, quantified in terms of sunspot numbers, are presented and analyzed. A conservative list of grand minima and maxima is also provided. Conclusions. The primary components of the reconstructed solar activity, as determined using the SSA method, are different for the series that are based on 14 C and 10 Be. This shows that these primary components can only be ascribed to long-term changes in the terrestrial system and not to the Sun. These components have therefore been removed from the reconstructed series. In contrast, the secondary SSA components of the reconstructed solar activity are found to be dominated by a common ≈2400-year quasi-periodicity, the so-called Hallstatt cycle, in both the 14 C and 10 Be based series. This Hallstatt cycle thus appears to be related to solar activity. Finally, we show that the grand minima and maxima occurred intermittently over the studied period, with clustering near lows and highs of the Hallstatt cycle, respectively.

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“…Among them we can find the Sunspots or Schwabe cycles (11 yr; Dean, 2000), Hale cycles (22 yr; Dean, 2000), Gleissberg cycles (88 yr; Braun et al, 2005;Peristykh and Damon, 2003), DeVries-Suess cycles (210 yr; Wagner et al, 2001), Hallstat or Hallstadtzeit cycles (∼2400 yr; Charvátová, 2000;Vasiliev and Dergachev, 2002). Such variability in the radiation from the sun has an effect on the climate dynamics of the Earth and it is the main motor (Rind, 2002).…”

Section: Introductionmentioning

confidence: 99%

Sea surface temperature anomalies, seasonal cycle and trend regimes in the Eastern Pacific coast

Ramos-Rodríguez¹,

Lluch‐Cota

et al. 2012

Ocean Sci.

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Abstract. We used the extended reconstruction of sea surface temperature (ERSST) to analyze the variation of surface temperature and the seasonal cycle along the coast of the eastern Pacific (60 • N-60 • S, 61 pixels alongshore) from 1950 to 2010 (732 months). First, we analyzed the monthly anomalies and looked for a relationship of such anomalies with total solar irradiance (TSI) and then the Regime Shift Detector (RSD) was applied to detect possible temperature regimes in the series. Afterwards, we calculated a yearly temperature range per pixel (amplitude of seasonal cycle) and through the subtraction of a latitudinal theoretical curve of temperature based on solar irradiance, the residuals of the seasonal cycle were obtained. The results showed an almost complete spatial synchrony and dominance of negative anomalies from 1950 to mid-late 1970's, with a switch to near-zero and positive anomalies that lasted up to late 1990's when a new shift to negative values was detected. Such a shift lasted until the early 2000's when positive anomalies appeared again but there was a change to negative anomalies in the late 2000's. These results were supported by the RSD. The TSI variability shows a clear relationship with that of sea surface temperature anomalies and with the regime changes. This is probably due to a difference in the amount of energy received from the sun. Comparing the "cool regime" versus the "warm regime", the second one

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

Cited by 92 publications

References 32 publications

A history of solar activity over millennia

A history of solar activity over millennia

Solar activity during the Holocene: the Hallstatt cycle and its consequence for grand minima and maxima

Sea surface temperature anomalies, seasonal cycle and trend regimes in the Eastern Pacific coast

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