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In:
XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Publication Date:
2023-07-18
Description:
Low-frequency oscillation plays a vital role in interpreting sea-level change and its acceleration. This presentation designed a novel objective analyzing scheme based on non-uniform time series processing methods and analyzed low-frequency sea-level change signals (〉10yr) on a global scale from tide gauge records. According to the frequency distribution and the average amplitude spectrum, a significant oscillation of about 60 years is verified to exist at many tide gauges. The spatial distribution of the signal's amplitude and phase was drawn and found to be in moderate agreement with the newly proposed theoretical formula. Through analysis of a great number of long-term geophysical time series, we support the conclusion that this 60yr oscillation is more likely from the Earth's internal motion than the sun and spread into global climate systems by angular momentum exchange.
Language:
English
Type:
info:eu-repo/semantics/conferenceObject
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