Through the empirical mode decomposition (EMD), we extrapolated the seasonal component of monthly temperature oscillation of N = 1,167 distributed on whole USA covering a period of 110 years from 1898 to 2008. We found an occasional destabilization of the phase of the seasonal component; moreover, the time distribution of these anomaly events is strongly correlated in time with a dominant periodicity remarkably close to the 18.6-year period of the Earth’s nutation that represents the stronger modulation to the Earth’s precession. Probably, phase-shift effect of seasonal oscillation is due to an orbit-climate relationship related to nutational forcing.

Empirical Mode Decomposition detects a phase-shift of seasonal oscillation / Capparelli, V.; Vecchio, A.; Carbone, Vincenzo. - In: ADVANCES IN ADAPTIVE DATA ANALYSIS. - ISSN 1793-7175. - 4:1-2(2012), p. 1250007.

Empirical Mode Decomposition detects a phase-shift of seasonal oscillation

CARBONE, Vincenzo
2012

Abstract

Through the empirical mode decomposition (EMD), we extrapolated the seasonal component of monthly temperature oscillation of N = 1,167 distributed on whole USA covering a period of 110 years from 1898 to 2008. We found an occasional destabilization of the phase of the seasonal component; moreover, the time distribution of these anomaly events is strongly correlated in time with a dominant periodicity remarkably close to the 18.6-year period of the Earth’s nutation that represents the stronger modulation to the Earth’s precession. Probably, phase-shift effect of seasonal oscillation is due to an orbit-climate relationship related to nutational forcing.
Empirical mode decomposition ; surface temperature ; seasonal oscillation ; phase-shift
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.11770/142632
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