Comparison of El Niño-Southern Oscillation Measurement Parameters Through Its Influences on Tree Growth Rings

Abstract

ResumoThis work analyzed the relationship between two El Niño-Southern Oscillation (ENSO) parameters, the Southern Oscillation Index (SOI) and the sea surface temperature in the NIÑO 3.4 region (NIÑO 3.4), with a ring width index (RWI) obtained from trees of Araucaria angustifolia species in Canela City (Southern Brazil). The chronology quality was calculated by series mean intercorrelation (rbt), expressed population signal (EPS), and signal-to-noise ratio (SNR). The findings show that ENSO does influence the climate in the Canela city region since both parameters gave very similar non-linear responses in the cross-wavelet coherence (WTC) analysis. Palavras-chave: Dendrocronologia. Dendroclimatologia. EL NIÑO 3.4. SOI. ENSO. Área do Conhecimento: Ciências Exatas e da Terra -Geociências.