EMD analysis of solar insolation |
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Authors: | Z S Lin S G Wang |
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Institution: | (1) Jiangsu Key Laboratory of Environmental Change and Ecological Construction, Nanjing Normal University, Nanjing, China;(2) The Department of Geography, Nanjing Normal University, Nanjing, China;(3) The Department of Atmospheric Sciences, Nanjing University, Nanjing, China |
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Abstract: | Summary A new time series analysis technique, Empirical Mode Decomposition (EMD), which has been successfully applied to nonlinear
and nonstationary data, is used to examine paleoclimate cycles in the Pleistocene (1 Ma bp–20 Ka bp). The purpose of this
study is to improve knowledge of the climatic significance of solar insolation. The results show that the eccentricity band
signal is much larger than previously estimated, having an amplitude of about 1% of solar irradiance which is comparable to
the amplitude of the precession and obliquity band signals. This finding implies the need to reconsider the role of solar
radiation on the formation and maintenance of quaternary ice sheet cycles. |
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Keywords: | |
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