Nonlinear statistics reveals stronger ties between ENSO and the tropical hydrological cycle

Details Nonlinear statistics reveals stronger ties between ENSO and the tropical hydrological cycle Nonlinear statistics reveals stronger ties between ENSO and the tropical hydrological cycle

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3324402k&link_type=abstract

Geophysical Research Letters, Volume 33, Issue 24, CiteID L24402

Physics

Geophysics

5

Global Change: Atmosphere (0315, 0325), History Of Geophysics: Nonlinear Geophysics, Hydrology: Hydroclimatology, Hydrology: Streamflow

Scientific paper

Cross-spectrum analysis based on linear correlations in the time domain suggested a coupling between large river flows and the El Niño-Southern Oscillation (ENSO) cycle. A nonlinear measure based on mutual information (MI) reveals extrabasinal connections between ENSO and river flows in the tropics and subtropics, that are 20-70% higher than those suggested so far by linear correlations. The enhanced dependence observed for the Nile, Amazon, Congo, Paraná, and Ganges rivers, which affect large, densely populated regions of the world, has significant impacts on inter-annual river flow predictabilities and, hence, on water resources and agricultural planning.

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