scostep 2010 (stp12) - Leibniz-Institut für Atmosphärenphysik an der ...
scostep 2010 (stp12) - Leibniz-Institut für Atmosphärenphysik an der ...
scostep 2010 (stp12) - Leibniz-Institut für Atmosphärenphysik an der ...
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STP12 Abstracts<br />
Berlin, 12 - 16 July <strong>2010</strong><br />
SCOSTEP Symposium <strong>2010</strong><br />
Solar Activity Signals on Centennial Temperature Time Series from S<strong>an</strong>ta Maria<br />
(29°41'S, 53°48'W), Southern Brazil<br />
Rampelotto Pabulo Henrique 1 , Rigozo Nivaor Rodolfo 1 , Da Rosa Marcelo Barcellos 2 , Prestes Al<strong>an</strong> 3 ,<br />
Souza Echer Mariza Pereira 4 , Nordem<strong>an</strong>n D<strong>an</strong>iel Je<strong>an</strong> Roger 4 , Schuch Nelson Jorge 1 , Dal Lago<br />
Alisson 4<br />
1 Southern Regional Space Research Center (CRS/INPE), 2 Fe<strong>der</strong>al University of S<strong>an</strong>ta Maria<br />
(UFSM), 3 University of Vale do Paraíba (UNIVAP), 4 National <strong>Institut</strong>e for Space Research (INPE)<br />
M<strong>an</strong>y attempts have been made to connect climatic ch<strong>an</strong>ges with variation in solar activity<br />
parameters, which has showed increased levels at the present compared with the Maun<strong>der</strong><br />
Minimum period. In this study we investigate the possible effects of solar activity (Rz <strong>an</strong>d<br />
Rz22) on the surface air temperature (1912 to 2008) from S<strong>an</strong>ta Maria (29°41'S, 53°48'W),<br />
Southern Brazil. Classical spectral <strong>an</strong>alysis for temperature has shown signific<strong>an</strong>t periods of<br />
11.8, 19.1 <strong>an</strong>d 64.3. Cross-wavelet between Rz (11yr) <strong>an</strong>d temperature was signific<strong>an</strong>t in the<br />
11 year signal after 1935, but it was weak around 1970–1980. Furthermore, it was also<br />
observed a high <strong>an</strong>d continuous cross correlation between temperature <strong>an</strong>d Rz22 (22yr) for the<br />
<strong>an</strong>alyzed period. The linear correlation between <strong>an</strong>nual temperature <strong>an</strong>d solar activity was r <<br />
-0.10 for Rz <strong>an</strong>d r = -0.19 for Rz22. These results suggest that, regarding the temperature<br />
variability, minor th<strong>an</strong> 10% c<strong>an</strong> be associated with a linear dependency to 11 year solar cycle<br />
<strong>an</strong>d around 19% to 22 year magnetic cycle. Therefore, it is possible that the effect of Hale<br />
cycle on climate may be stronger th<strong>an</strong> the Schwabe cycle effect.
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