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          Institute: MPI für Meteorologie     Collection: IMPRS     Display Documents



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ID: 442451.0, MPI für Meteorologie / IMPRS
Continuum climate variability: long-term memory, scaling, and 1/F-noise
Authors:Fraedrich, K.; Blender, R.; Zhu, X.
Language:English
Date of Publication (YYYY-MM-DD):2009-11
Title of Journal:International Journal of Modern Physics B
Volume:23
Start Page:5403
End Page:5416
Review Status:Peer-review
Audience:Not Specified
Abstract / Description: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.
External Publication Status:published
Document Type:Article
Communicated by:Kauhs
Affiliations:MPI für Meteorologie/Ocean in the Earth System
MPI für Meteorologie/IMPRS Earth System Modelling
External Affiliations:University of Hamburg, Meteorological Institute
Identifiers:DOI:10.1142/S0217979209063729
URL:http://www.worldscinet.com/ijmpb/23/2328n29/S02179...
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