New paper finds evidence of Svensmark's cosmic ray theory of climate on a regional scale

A new paper published in Annales Geophysicae finds "an indirect indication of possible relationships between the variability of galactic cosmic rays and climate change on a regional scale," supportive of Svensmark's cosmic ray theory of climate. The authors find climate patterns in southern Brazil correlated to 11-22 year solar cycles and El Nino Southern Oscillation [ENSO] cycles. ENSO, in turn, has been linked to solar activity and lunisolar cycles.



Svenmark's cosmic ray theory of climate is only one of many solar amplification mechanisms described in the peer-reviewed literature. 

Ann. Geophys., 31, 1833-1841, 2013 www.ann-geophys.net/31/1833/2013/ doi:10.5194/angeo-31-1833-2013 Evidence for cosmic ray modulation in temperature records from the South Atlantic Magnetic Anomaly region

E. Frigo^1,2, I. G. Pacca¹, A. J. Pereira-Filho³, P. H. Rampelloto⁴, and N. R. Rigozo<sup>5

1</sup>Departamento de Geofísica, Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Universidade de São Paulo, São Paulo, Brazil
²Universidade Federal do Pampa, Campus Caçapava do Sul, Caçapava do Sul, Brazil
³Departamento de Ciências Atmosféricas, Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Universidade de São Paulo, São Paulo, Brazil
⁴Universidade Federal do Pampa, Campus São Gabriel, São Gabriel, Brazil
⁵Divisão de Geofísica Espacial, Instituto Nacional de Pesquisas Espaciais, São José dos Campos, Brazil

Abstract. Possible direct or indirect climatic effects related to solar variability and El Niño–Southern Oscillation (ENSO) were investigated in the southern Brazil region by means of the annual mean temperatures from four weather stations 2 degrees of latitude apart over the South Atlantic Magnetic Anomaly (SAMA) region. Four maximum temperature peaks are evident at all stations in 1940, 1958, 1977 and 2002. A spectral analysis indicates the occurrence of periodicities between 2 and 7 yr, most likely associated with ENSO, and periodicities of approximately 11 and 22 yr, normally associated with solar variability. Cross-wavelet analysis indicated that the signal associated with the 22 yr solar magnetic cycle was more persistent in the last decades, while the 11 yr sunspot cycle and ENSO periodicities were intermittent. Phase-angle analysis revealed that temperature variations and the 22 yr solar cycle were in anti-phase near the SAMA center. Results show an indirect indication of possible relationships between the variability of galactic cosmic rays and climate change on a regional scale.