Variability of rainfall and temperature (1912-2008) parameters measured from Santa Maria (29 degrees 41 ' S, 53 degrees 48 ' W) and their connections with ENSO and solar activity


Autoria(s): Rampelotto, P. H.; Rigozo, N. R.; da Rosa, M. B.; Prestes, A.; Frigo, E.; Souza Echer, M. P.; Nordemann, D. J. R.
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

06/11/2013

06/11/2013

2012

Resumo

In this work, we analyze the long term variability of rainfall and temperature (1912-2008) of Santa Maria (29 degrees S, 53 degrees W) and its possible connection with natural influences such as solar activity and ENSO. Temperature and rainfall present similar frequencies as revealed by spectral analyses. This analysis shows a large number of short periods between 2-8 years and periods of 11.8-12.3, 19.1-21.0, and 64.3-82.5 years. The cross correlation for rainfall and temperature versus Southern Oscillation Index (SOI) have higher cross-power around 2-8 yr. Rainfall and temperature versus sunspot number (Rz) showed higher cross-power around the 11-yr solar cycle period. A high and continuous cross correlation was observed for Rz-22 yr versus rainfall and temperature. Furthermore, the power between 22-yr solar cycle and meteorological parameters was higher than that obtained with the 11-yr solar cycle, suggesting that the effect of Hale cycle on climate may be stronger than the Schwabe cycle effect. These results indicate that the variability of rainfall and temperature is closely related to the variation of the Southern Oscillation Index and solar activity, and that the El Nino Southern Oscillation and solar activity probably play an important role in the climate system over Southern Brazil. (C) 2011 Elsevier Ltd. All rights reserved.

CNPq [APQ470252/2009-0, APQ470455/2010-1, 301033/2009-9, 151609/2009-8]

FAPERGS [1013273]

FAPESP [2009/02907-8]

CAPES

Identificador

JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS, OXFORD, v. 77, n. 4, pp. 152-160, MAR, 2012

1364-6826

http://www.producao.usp.br/handle/BDPI/42657

10.1016/j.jastp.2011.12.012

http://dx.doi.org/10.1016/j.jastp.2011.12.012

Idioma(s)

eng

Publicador

PERGAMON-ELSEVIER SCIENCE LTD

OXFORD

Relação

JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS

Direitos

closedAccess

Copyright PERGAMON-ELSEVIER SCIENCE LTD

Palavras-Chave #SOLAR ACTIVITY #ENSO #CLIMATE #SURFACE AIR-TEMPERATURE #GALACTIC COSMIC-RAYS #WAVELET ANALYSIS #CLIMATE-CHANGE #EL-NINO #SOUTH-AMERICA #CYCLE #BRAZIL #EVOLUTION #SIGNALS #GEOCHEMISTRY & GEOPHYSICS #METEOROLOGY & ATMOSPHERIC SCIENCES
Tipo

article

original article

publishedVersion