%0 Journal Article
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%@issn 0016-7169
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%3 NivaorENSO2004.pdf
%X Wavelet spectral analysis was made in tree ring width data from Brazil (27°11S, 51°59W) and Chile (49°12S, 73°50W) over the period 1876-1994. Southern Oscillation Index-SOI, representative of ENSO phenomena, and Global mean Surface Air Temperature (GAST) data have been analyzed by wavelet transform. A 2-8 year range was selected. Fluctuations were observed in all data, as expected; these indicate the ENSO imprint on tree-ring data. Strong and weak amplitudes alternate, and frequency shifts in the signal were observed. The strongest signals were observed in the 4-8 year band in Chilean tree ring data, near 1906- 1920 and 1930-1950, and in Brazilian tree ring data in the 6-8 year band near 1906 and 1950. SOI spectrum presented a larger number of intense amplitudes as expected, and GAST spectra showed high intensity only in 1906-1928, in the 5-8 year band. The results show a clear ENSO influence on tree growth.
%N 2
%T ENSO influence on tree ring data from Chile and Brazil
%@secondarytype PRE PN
%K SPACE GEOPHYSICS, Tree ring data, Time series, Wavelet spectral analysis, ENSO phenomenon, GEOFÍSICA ESPACIAL, Análise espectral com ondículas, Fenômeno ENSO.
%@visibility shown
%@group DGE-INPE-MCT-BR
%@group DGE-INPE-MCT-BR
%@group DGE-INPE-MCT-BR
%@group DGE-INPE-MCT-BR
%@secondarykey INPE-11137-PRE/6593
%@copyholder SID/SCD
%2 sid.inpe.br/jeferson/2004/07.28.12.20.43
%@affiliation Instituto Nacional de Pesquisas Espaciais, Divisão de Geofísica Espacial (INPE.DGE)
%@affiliation Instituto Nacional de Pesquisas Espaciais, Divisão de Geofísica Espacial (INPE.DGE)
%@affiliation Instituto Nacional de Pesquisas Espaciais, Divisão de Geofísica Espacial (INPE.DGE)
%@affiliation Instituto Nacional de Pesquisas Espaciais, Divisão de Geofísica Espacial (INPE.DGE)
%@project GEONAT: Geofísica espacial por análise de registros naturais
%B Geofísica Internacional
%P 287-294
%4 sid.inpe.br/jeferson/2004/07.28.12.20
%D 2004
%V 43
%A Rigozo, Nivaor Rodolfo,
%A Nordemann, Daniel Jean Roger,
%A Echer, Ezequiel,
%A Vieira, Luis Eduardo Antunes,
%@dissemination WEBSCI; PORTALCAPES; AGU.
%@area CEA