Deutsch
 
Benutzerhandbuch Datenschutzhinweis Impressum Kontakt
  DetailsucheBrowse

Datensatz

DATENSATZ AKTIONENEXPORT

Freigegeben

Zeitschriftenartikel

Variability regimes of simulated Atlantic MOC

MPG-Autoren
/persons/resource/persons37390

Zhu,  X.
Max Planck Fellows, MPI for Meteorology, Max Planck Society;
The Land in the Earth System, MPI for Meteorology, Max Planck Society;

/persons/resource/persons37148

Fraedrich,  K.
Max Planck Fellows, MPI for Meteorology, Max Planck Society;

Externe Ressourcen
Es sind keine Externen Ressourcen verfügbar
Volltexte (frei zugänglich)
Es sind keine frei zugänglichen Volltexte verfügbar
Ergänzendes Material (frei zugänglich)
Es sind keine frei zugänglichen Ergänzenden Materialien verfügbar
Zitation

Zhu, X., Fraedrich, K., & Blender, R. (2006). Variability regimes of simulated Atlantic MOC. Geophysical Research Letters, 33: 21603. doi:10.1029/2006GL027291.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0011-FDD7-7
Zusammenfassung
The spectral variability structure of the meridional overturning circulation (MOC) of the Atlantic Ocean is determined in 500 year simulations with state-of-the-art coupled atmosphere-ocean general circulation models (GFDL and ECHAM5/MPIOM). The power spectra of the monthly stream function are compared with trend-eliminating detrended fluctuation analysis (DFA2). The shapes of the spectra differ substantially between latitudes, depth and the two models with constant (white) behaviour for high frequencies as a single common feature. The most frequent property of the spectra is power-law scaling, S(f) ∼ f −β , with nontrivial exponents, mostly β ≈ 1, in agreement with 1/f or flicker noise; this is mainly found in the interannual to decadal frequency range (1/f spectra observed for sea surface temperature fluctuations are explained by a stochastically forced ocean energy balance model with vertical diffusion). For lowest frequencies, some spectra show stationary long term memory, while others reveal spectra increasing with frequency. None of the spectra can be considered uniquely as red noise explained by an ocean integrating a white stochastic atmospheric forcing.