%0 Journal Article
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%@nexthigherunit 8JMKD3MGPCW/3EU29DP 8JMKD3MGPCW/3EUFCFP
%@archivingpolicy denypublisher denyfinaldraft24
%@issn 1364-6826
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%@resumeid 8JMKD3MGP5W/3C9JGT6
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%@resumeid 8JMKD3MGP5W/3C9JH3D
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%3 solar activity imprints.pdf
%X We have investigated the solar activity signal in tree ring data from two locations in Chile. The tree ring time series extended over a period of 400 yr. Spectral and wavelet analysis techniques were employed. We have found evidence for the presence of the solar activity Schwabe (11 yr), Hale (22 yr), fourth-harmonic of the 208-yr Suess cycle (52 yr) and Gleissberg (80 yr) cycles. The Gleissberg cycle of tree ring data is in anti-phase with solar activity. Wavelet and cross-wavelet techniques revealed that the periods found are intermittent, possibly because solar activity signals observed in tree rings are mostly due to solar influence on local climate (rainfall, temperature, and cloud cover) where trees grow up. Further, cross-wavelet analysis between sunspot and tree ring time series showed that the cross power around the 11 yr solar cycle is more significant during periods of high solar activity (grand maximum) than during periods of low solar activity (grand minimum). As Glaciar Pio XI is practically at the Pacific Ocean level, the tree-ring response may be stronger due to the heating of the Pacific Ocean water following an increase of the solar radiation incidence rather than at the higher altitudes of Osorno region.
%8 July
%N 9
%T Solar activity imprints in tree ring width from Chile (1610-1991)
%@secondarytype PRE PI
%K Solar maximum, Solar minimum, Tree ring data, Spectral analysis, Wavelet analysis.
%@visibility shown
%@group DGE-INPE-MCT-BR
%@group DGE-INPE-MCT-BR
%@group DGE-INPE-MCT-BR
%@group DGE-INPE-MCT-BR
%@group
%@group RSU-INPE-MCT-BR
%@secondarykey INPE-14765-PRE/9736
%@copyholder SID/SCD
%2 sid.inpe.br/mtc-m17@80/2007/06.28.15.31.58
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Laboratório de Radioecologia e Mudanças Globais. Departamento de Biofísica e Biometria. Universidade do Estado do Rio de Janeiro (UERJ.LARAMG)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Universidade do Vale do Paraíba (UNIVAP)
%B Journal of Atmospheric and Solar-Terrestrial Physics
%P 1049-1056
%4 sid.inpe.br/mtc-m17@80/2007/06.28.15.31
%D 2007
%V 69
%A Rigozo, Nivaor Rodolfo,
%A Nordemann, Daniel Jean Roger,
%A Echer, Mariza Pereira de Souza,
%A Echer, Ezequiel,
%A Silva, H. E.,
%A Prestes, A.,
%A Guarnieri, F. L.,
%@dissemination WEBSCI; PORTALCAPES; AGU; MGA; COMPENDEX.
%@area CEA