Article
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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
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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