Wavelet analysis of Amazon hydrological regime variability

Wavelet analysis of Amazon hydrological regime variability

Wavelet analysis allows for an insightful examination of the temporal variability of Amazon basin hydrology and highlights intermittent interannual and interdecadal fluctuations. Two main conclusions arise. Interannual fluctuations appear as closely related to equatorial Pacific forcings whereas 15‐...

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Veröffentlicht in:Geophysical research letters 2004-01, Vol.31 (2), p.L02501.1-n/a
Hauptverfasser: Labat, David, Ronchail, Josyane, Callede, Jacques, Guyot, Jean Loup, De Oliveira, Eurides, Guimarães, Waldemar
Format: Artikel
Sprache:eng
Schlagworte:
Amazon hydrology
Atlantic SST
climatic forcings
Earth, ocean, space
ENSO
Exact sciences and technology
Freshwater
Marine
wavelet analyses
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Zusammenfassung:Wavelet analysis allows for an insightful examination of the temporal variability of Amazon basin hydrology and highlights intermittent interannual and interdecadal fluctuations. Two main conclusions arise. Interannual fluctuations appear as closely related to equatorial Pacific forcings whereas 15‐year and bi‐decadal fluctuations are strongly correlated with Pacific and tropical Atlantic long term forcings. The 1970's climate shift affects the Amazon basin, implying a correlation between both NATL and SOI and hydrological proxies after that decade.
ISSN:0094-8276
1944-8007
DOI:10.1029/2003GL018741