Earth and Planetary Science

On the Millennial-scale Variability in Climate of the Northern Hemisphere

Maxim G. Ogurtsov

1. Ioffe Physico-Technical Institute, St. Petersburg, 194021, Russia
2. Central Astronomical Observatory at Pulkovo, 196140, Russia

DOI: https://doi.org/10.36956/eps.v2i1.828

Received: 19 March 2023; Revised: 10 April 2023; Accepted: 23 April 2023; Published Online: 26 April 2023

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Abstract

The question of the existence of millennial-scale climate variability and its possible impacts is important for interpreting long-term climate changes and predicting its future. In the present work a statistical analysis of the seven most recent annual reconstructions of the Northern Hemisphere temperature, covering time intervals with a length from 1260 to 2016 years, was carried out. The analysis included data of different types - both tree-ring paleo reconstructions and multi-proxies. The study was carried out using both methods of Fourier and wavelet analysis. It is shown that the yearly resolved modern temperature reconstructions indicate that in the temperature of the Northern Hemisphere of the Earth in the last 1-2 millennia there is a strong variation with a period close to 900 years. The 1400-year variation appears only in a few temperature reconstructions. Thus, the presence of a weaker 1400-year variation in the temperature of the Northern Hemisphere is not excluded but this is uncertain. The obtained difference in the spectral compositions of different data sets can be associated with: (a) the difference in the geographical location of the individual temperature indicators used, (b) the difference in the methods of standardization and generalization of the used individual proxies, (c) the difference in the seasonality of the temperature reconstructions. Although the evidence obtained for the existence of the millennial-scale variability in the climate of the Northern Hemisphere is sufficiently convincing, a concluding answer to the question of its character requires the analysis of more reconstructions that: (a) are at least several millennia-long, (b) have high time resolution, (c) use a network of individual indicators covering the largest part of the Northern Hemisphere.

Keywords: Climatic change, Paleoclimatology, Dendrochronology

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References

[1] Bond, G.C., Showers, W., Cheseby, M., et al., 1997. A pervasive millennial-scale cycle in North Atlantic Holocene and glacial climates. Science. 278(5341), 1257-1266.

[2] Bond, G.C., Kromer, B., Beer, J., et al., 2001. Persistent solar influence on North Atlantic climate during the Holocene. Science. 294(5549), 2130-2136.

[3] Braun, H., Cyristl, M., Ramhstorf, S., et al., 2005. Possible solar origin of the 1,470-year glacial climate cycle demonstrated in a coupled model. Nature. 438(7065), 208-211.

[4] Obrochta, S.P., Miyahara, H., Yokoyama, Y., et al., 2012. A re-examination of evidence for the North Atlantic “1500-year cycle” at Site 609. Quaternary Science Reviews. 55, 23-33.

[5] Loehle, C., Singer, F., 2010. Holocene temperature records show millennial-scale periodicity. Canadian Journal of Earth Sciences. 47(10), 1327-1336.

[6] Kelsey, A., 2022. Abrupt climate change and millennial-scale cycles: An astronomical mechanism. Climate of the Past Discussions. (preprint), 1-19. DOI: https://doi.org/10.5194/cp-2022-49

[7] Alley, R.B., Anandakrishnan, S., Jung, P., 2001. Stochastic resonance in the North Atlantic. Paleoceanography. 16, 190-198.

[8] Ditlevsen, P.D., Andersen, K.K., Svensson, A., 2007. The DO-climate events are probably noise induced: Statistical investigation of the claimed 1470 years cycle. Climate of the Past. 3(1), 129-134.

[9] Clemens, S.C., 2005. Millennial-band climate spectrum resolved and linked to centennial-scale solar cycles. Quaternary Science Reviews. 24(5-6), 521-531.

[10] Loehle, C., 2007. A 2000-year global temperature reconstruction on non-tree ring proxies. Energy and Environment. 18(7), 1049-1058.

[11] Moberg, A., Sonechkin, D.M., Holmgren, K., et al., 2005. Highly variable Northern Hemisphere temperatures reconstructed from low- and high-resolution proxy data. Nature. 433(7026), 613-617.

[12] Christiansen, B., Ljungqvist, F.C., 2012. The extra-tropical Northern Hemisphere temperature in the last two millennia: Reconstructions of low-frequency variability. Climate of the Past. 8(2), 765-786.

[13] Schneider, L., Smerdon, J.E., Büntgen, U., et al., 2015. Revising midlatitude summer temperatures back to A.D. 600 based on a wood density network. Geophysical Research Letters. 42(11), 4556-4562.

[14] Wilson, R., Anchukaitis, K., Briffa, K., et al., 2016. Last millennium northern hemisphere summer temperatures from tree rings: Part I: The long term context. Quaternary Science Reviews. 134, 1-18.

[15] Guillet, S., Corona, C., Stoffel, M., et al., 2017. Climate response to the Samalas volcanic eruption in 1257 revealed by proxy records. Nature Geoscience. 10(2), 123-128.

[16] Büntgen, U., Allen, K., Anchukaitis, K.J., et al., 2021. The influence of decision-making in tree ring-based climate reconstructions. Nature Communications. 12(1), 3411.

[17] Torrence, C., Compo, G.P., 1998. A practical guide to wavelet analysis. Bulletin of the American Meteorological Society. 79(1), 61-78.

[18] Lau, K.M., Weng, H., 1995. Climate signal detection using wavelet transform: How to make a time series sing. Bulletin of the American Meteorological Society. 76(12), 2391-2402.

[19] Mann, M., Park, J., Bradley, R., 1995. Global interdecadal and century-scale climate oscillations during the past five centuries. Nature. 378(6554), 266-270.

[20] Ogurtsov, M., 2021. Decadal and di-decadal periodicities in temperature of Southern Scandinavia: Manifestations of natural variability or climatic response to solar cycles? Atmosphere. 12(6), 676.