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Global marine temperature variation and the solar magnetic cycle
Author(s) -
Newell Nicholas E.,
Newell Reginald E.,
Hsiung Jane,
Zhongxiang Wu
Publication year - 1989
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl016i004p00311
Subject(s) - amplitude , climatology , fourier transform , period (music) , global temperature , solar cycle , environmental science , fourier analysis , atmospheric sciences , variation (astronomy) , oceanography , geology , physics , climate change , global warming , astrophysics , solar wind , optics , magnetic field , quantum mechanics , acoustics
Global and hemispheric marine temperatures for 1856‐1986 have been subjected to harmonic analysis. We investigated a prominent 22‐year peak in the Fourier Transform by subtracting from the raw data the inverse transform of the periods longer than 26.2 years (the fifth harmonic). The shorter periods that remain are dominated by the 22‐year period the approximate amplitude and phase of which we determined with a 10‐year running mean filter. We suggest that this period may be related to the solar magnetic cycle. The low frequency data show a major dip centered around the period 1905‐1910. These results should be considered in any analysis of global marine temperature for trends.