Spectral characteristics and ENSO relationship of the Paraná river streamflow

Authors

  • R. P. KANE Instituto Nacional de Pesquisas Espacias – INPE C. P. 515, 12245-970 – São José dos Campos, SP, Brazil

DOI:

https://doi.org/10.54302/mausam.v56i2.939

Keywords:

QBO, El Niño, SST anomalies

Abstract

A spectral analysis of the Paraná river stream flow for 1904-1999 for 3 seasons indicated a periodicity of ~8.5 years in all seasons, with extra periodicities at ~17, ~5, ~3.7 and ~2.8 (QBO) years in JFMA months, at ~29, ~13, ~4.7, ~3.7, ~2.4 and ~2.1(QBO) years in MAMJ months, and at ~27 and ~3.4 years (no QBO) in SOND months. El Niños were associated with positive anomalies (floods) of the stream flow, with lags of few months. Pacific SST anomalies were of the same peak magnitude in the giant El Niño events of 1982 and 1997, but the stream flow anomalies were much larger in 1983 as compared to 1997. The rise and fall of the stream flow anomalies was oscillatory with peak separation of ~5 months.

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Published

01-04-2005

How to Cite

[1]
R. P. KANE, “Spectral characteristics and ENSO relationship of the Paraná river streamflow”, MAUSAM, vol. 56, no. 2, pp. 367–374, Apr. 2005.

Issue

Vol. 56 No. 2 (2005): MAUSAM

Section

Research Papers

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