Globally strong geomagnetic field intensity circa 3000 years ago

Hong, Hoabin; Yu, Yongjae; Lee, Chan Hee; Kim, Ran Hee; Park, Jingyu; Doh, Seong Jae; Kim, Wonnyon; Sung, Hyongmi

doi:10.1016/j.epsl.2013.09.043

Cited by 34 publications

(35 citation statements)

References 75 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It would be difficult to explain this following increase in 14 C production (resulting in a younger apparent age) at a time of high geomagnetic field, if it were due only to geomagnetic field variations, but a significant contribution to an explanation of 14 C offsets is possible. Hong et al (2013) note several rapid decreases in VADM at approximately 800-700 BC and AD 700. The VADM maximum varies by location of measurement and is an estimate of the global dipole based on that location.…”

Section: Geomagnetic Field Effectsmentioning

confidence: 99%

“…The period 1000-500 BC is characterized by a high VADM with average values higher than today (see Figure 5 of Shaar et al 2016), Various geomagnetic proxy records show rapid "spikes" in the geomagnetic signal at certain locations of the Northern Hemisphere. Schaar et al (2016) discuss geomagnetic phenomena beginning about 1300 BC, which appears to be a precursor to other spikes observed in Chinese and other Far Eastern archeomagnetic samples from East Asia at around 1000 BC (Hong et al 2013;Cai et al 2017). Ben Yosef et al (2009) andSchaar et al (2011) also found geomagnetic "spikes" in 14 C carbondated slag mounds from southern Israel dated to~980 and 890 BC.…”

Section: Geomagnetic Field Effectsmentioning

confidence: 99%

See 1 more Smart Citation

More Rapid ¹⁴C Excursions in the Tree-Ring Record: A Record of Different Kind of Solar Activity at About 800 BC?

et al. 2018

View full text Add to dashboard Cite

ABSTRACT. Two radiocarbon ( 14 C) excursions are caused by an increase of incoming cosmic rays on a short time scale found in the Late Holocene , which are widely explained as due to extreme solar proton events (SPE). In addition, a larger event has also been reported at 5480 BC (Miyake et al. 2017a), which is attributed to a special mode of a grand solar minimum, as well as another at 660 BC (Park et al. 2017). Clearly, other events must exist, but could have different causes. In order to detect more such possible events, we have identified periods when the 14 C increase rate is rapid and large in the international radiocarbon calibration (IntCal) data (Reimer et al. 2013). In this paper, we follow on from previous studies and identify a possible excursion starting at 814-813 BC, which may be connected to the beginning of a grand solar minimum associated with the beginning of the Hallstatt period, which is characterized by relatively constant 14 C ages in the period from 800-400 BC. We compare results of annual 14 C measurements from tree rings of sequoia (California) and cedar (Japan), and compare these results to other identified excursions, as well as geomagnetic data. We note that the structure of the increase from 813 BC is similar to the increase at 5480 BC, suggesting a related origin. We also assess whether there are different kinds of events that may be observed and may be consistent with different types of solar phenomena, or other explanations.

show abstract

Section: Geomagnetic Field Effectsmentioning

confidence: 99%

Section: Geomagnetic Field Effectsmentioning

confidence: 99%

More Rapid ¹⁴C Excursions in the Tree-Ring Record: A Record of Different Kind of Solar Activity at About 800 BC?

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Here we used the GEOMAGIA50.v3 database (Donadini et al 2006;Korhonen et al 2008;Brown et al 2015) to which we added recent archeo-and paleointensity results (Cai et al 2014(Cai et al , 2015Cromwell et al 2015;de Groot et al 2015;Di Chiara et al 2014;Gallet et al 2008Gallet et al , 2009Gallet & Al Maqdissi 2010;Hong et al 2013;Kapper et al 2015;Kissel et al 2015;Osete et al 2015;Shaar et al 2015;Stillinger et al 2015). Concerning the data compiled in this version of GEOMAGIA, the Mesopotamian data from Nachasova & Burakov (1995 were modified according to .…”

Section: Appendix A: Gmag9k Axial Dipole Evolutionmentioning

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

131

183

View full text Add to dashboard Cite

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.

show abstract

“…Ben-Yosef et al (2009) and Shaar et al (2011) reported high field intensity fluctuations in the southern Levant (Israel and Jordan) during the 10th and the 9th century BCE that they referred to as "geomagnetic spikes". The "spikes" are the extreme climax of a high field maximum (>160 ZAm 2 ) in the Levant that appears in close approximation to other unusually high paleointensity values seen in Turkey (Ertepinar et al, 2012) and Georgia (Shaar et al., 2013), and to other local maxima with lower values seen, for example, in France (Herve et al, 2013), and SE Asia (Hong et al, 2013). Thus, at least at a continental scale, the high-field episode is likely associated with a complicated field structure Kovacheva et al, 2009;Tema and Kondopoulou, 2011;Tema et al, 2012;Kovacheva et al, 2014), suggesting a complex global deviation from a simple dipole configuration (de Groot et al, 2013(de Groot et al, , 2015 that calls for further investigation.…”

Section: Introductionmentioning

confidence: 99%

Large geomagnetic field anomalies revealed in Bronze to Iron Age archeomagnetic data from Tel Megiddo and Tel Hazor, Israel

Shaar

Tauxe

Ron

et al. 2016

Earth and Planetary Science Letters

170

View full text Add to dashboard Cite

Globally strong geomagnetic field intensity circa 3000 years ago

Cited by 34 publications

References 75 publications

More Rapid ¹⁴C Excursions in the Tree-Ring Record: A Record of Different Kind of Solar Activity at About 800 BC?

More Rapid ¹⁴C Excursions in the Tree-Ring Record: A Record of Different Kind of Solar Activity at About 800 BC?

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

Large geomagnetic field anomalies revealed in Bronze to Iron Age archeomagnetic data from Tel Megiddo and Tel Hazor, Israel

Contact Info

Product

Resources

About

Globally strong geomagnetic field intensity circa 3000 years ago

Cited by 34 publications

References 75 publications

More Rapid 14C Excursions in the Tree-Ring Record: A Record of Different Kind of Solar Activity at About 800 BC?

More Rapid 14C Excursions in the Tree-Ring Record: A Record of Different Kind of Solar Activity at About 800 BC?

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

Large geomagnetic field anomalies revealed in Bronze to Iron Age archeomagnetic data from Tel Megiddo and Tel Hazor, Israel

Contact Info

Product

Resources

About

More Rapid ¹⁴C Excursions in the Tree-Ring Record: A Record of Different Kind of Solar Activity at About 800 BC?

More Rapid ¹⁴C Excursions in the Tree-Ring Record: A Record of Different Kind of Solar Activity at About 800 BC?