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Continuum climate variability:long-term memory, scaling, and 1/F-noise

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Zhu,  Xiuhua
MPI for Meteorology, Max Planck Society;

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引用

Fraedrich, K., Blender, R., & Zhu, X. (2009). Continuum climate variability:long-term memory, scaling, and 1/F-noise. International Journal of Modern Physics B, 5403-5416. doi:10.1142/S0217979209063729.


引用: https://hdl.handle.net/21.11116/0000-000B-463B-5
要旨
Continuum temperature variability represents the response of the Earth's climate to deterministic external forcing. Scaling regimes are observed which range from hours to millennia with low frequency fluctuations characterizing long-term memory. The presence of 1/f power spectra in weather and climate is noteworthy: (i) In the tropical atmosphere 1/f scaling ranging from hours to weeks is found for several variables; it emerges as superposition of uncorrelated pulses with individual 1/f spectra. (ii) The daily discharge of the Yangtze shows 1/f within one week to one year, although the precipitation spectrum is white. (iii) Beyond one year mid-latitude sea surface temperatures reveal 1/f scaling in large parts of the global ocean. The spectra can be simulated by complex atmosphere-ocean general circulation models and understood as a two layer heat diffusion process forced by an uncorrelated stochastic atmospheric. Long-term memory on time scales up to millennia are the global sea surface temperatures and the Greenland ice core records (GISP2, GRIP) with delta O-18 temperature proxy data during the Holocene. Complex atmosphere ocean general circulation models reproduce this behavior quantitatively up to millennia without solar variability, interacting land-ice and vegetation components.