Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Evidence for Hemispheric-Scale Bicentennial Periodicity in Northern Hemisphere Temperature

Version 1 : Received: 22 March 2024 / Approved: 27 March 2024 / Online: 27 March 2024 (03:16:48 CET)

How to cite: Ogurtsov, M. Evidence for Hemispheric-Scale Bicentennial Periodicity in Northern Hemisphere Temperature. Preprints 2024, 2024031645. https://doi.org/10.20944/preprints202403.1645.v1 Ogurtsov, M. Evidence for Hemispheric-Scale Bicentennial Periodicity in Northern Hemisphere Temperature. Preprints 2024, 2024031645. https://doi.org/10.20944/preprints202403.1645.v1

Abstract

Eight reconstructions of temperature in the Northern Hemisphere covering 1192-2015 years were analyzed using both Fourier, wavelet and principal component approaches. A hemispheric-scale cyclicity with a period of 170-250 years was found present in Northern Hemisphere temperature for more than the last millennium. It is shown that this variation may have a certain contribution to warming in the first half of the 20th century. However, the last 4-5 decades are most likely a period of decline of this cycle. Possible origins of the revealed bicentennial periodicity are discussed.

Keywords

paleoclimatology; climatic variability; dendrochronology

Subject

Environmental and Earth Sciences, Atmospheric Science and Meteorology

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