ORTHOGONAL WAVELET ANALYSIS OF SO AND NAO
Abstract：121-years (1873～1993) seasonal time series of SOI and NAOI areanalyzed by means of orthogonal wavelet transform. It shows that the most significant variation of SOI(NAOI) is in the 2～7-yr(<2-yr) band of period, with 55.1 %(64.3 %) of variability. Interannual and decadal changes of SOI are more distinct before 1920 and after 1960 than in the other period. In the past century and more, SOI (NAOI) dropped (arised) with a trend rate of -0.52(0.25)/century. SOI manifestly negatively correlated with NAOI only in >28-yr band. Recently northern global climate was controlled by high (low) base state, low (high) decadal and interannual variability of SOI(NAOI).
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Publication Date：2001-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 57-64 )