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| Titel |
Wavelet Correlation and Multi-scale Coupling in Geophysical Systems |
| VerfasserIn |
Erik Casagrande, Brigitte Mueller, Diego Miralles, Dara Entekhabi, Annalisa Molini |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250111161
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| Publikation (Nr.) |
 EGU/EGU2015-11247.pdf |
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| Zusammenfassung |
| Multiscale interactions and their inference from observations are the main focus of this
contribution. We investigate the potential of continuous wavelet decomposition and wavelet
cross-correlation for identifying multiscale interactions, feedback loops and regime shifts
characteristic of geophysical systems displaying coupling over a range of different temporal
scales. The ability of wavelet cross-correlation to resolve the fast and slow components of
coupled systems is tested on synthetic processes of known directionality, and then applied to
a classic case-study of interaction between land and atmosphere – the coupling
between soil moisture and near ground air temperature. The impact of residual
auto-correlation and wavelet localization on the inference of multiscale couplings is also
discussed, together with possible extensions of this method to the study of causal
relationships. |
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