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

Rampelotto, Pabulo Henrique; Rigozo, Nivaor Rodolfo; Rosa, Marcelo Barcellos da; Prestes, A.; Frigo, Everton; Echer, M.P. Souza; Nordemann, D. J. R.

doi:10.1016/j.jastp.2011.12.012

Cited by 23 publications

(11 citation statements)

References 75 publications

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“…The Hale solar magnetic cycle signal was persistent during the entire period for all analyzed locations, in agreement with Souza Echer et al (2008) and Rampelotto et al (2012), who used data from a single location. The four temperature maxima in the time interval between 1933 and 2008 occurred simultaneously at all weather stations, which are separated by 2 degrees of latitude.…”

Section: Discussionsupporting

confidence: 90%

“…Furthermore, there is no noticeable common standard relationship for all locations in terms of the time-series phase angles. This intermittence of the 11 yr signal was also observed by Souza Echer et al (2008) and by Rampelotto et al (2012) and might be related to a non-linear local climatic response to solar variations. However, the most striking factor affecting the temperature records for the investigated locations appears to be the 22 yr solar cycle, as indicated by the temperature maxima, the ARIST spectral analysis and the high amplitudes in the wavelet coherence spectrum, which agrees with previous work by Souza Echer et al (2008) and Rampeloto et al (2012).…”

Section: Discussionsupporting

confidence: 82%

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Evidence for cosmic ray modulation in temperature records from the South Atlantic Magnetic Anomaly region

Frigo

Pacca²,

Filho³

et al. 2013

Ann. Geophys.

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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.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionsupporting

confidence: 82%

Evidence for cosmic ray modulation in temperature records from the South Atlantic Magnetic Anomaly region

Frigo

Pacca²,

Filho³

et al. 2013

Ann. Geophys.

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“…This fact indicates that during the El Niño events (SOI neg- ative) there is an increasing temperature tendency due to the highest precipitation levels. Rampelotto et al (2012) showed that the rainfall and the temperature variability in Santa Maria, RS (29 • 41 S, 53 • 48 W) is related to the SOI variation, especially during El Niño events. Souza Echer et al (2008) also found that the precipitation at Pelotas, RS (31 • 46 19 S, 52 • 20 33 W) is strongly influenced by the ENSO phenomenon.…”

Section: Climate Influencesmentioning

confidence: 99%

Araucaria growth response to solar and climate variability in South Brazil

et al. 2018

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Abstract. In this work, the Sun-Earth-climate relationship is studied using tree growth rings of Araucaria angustifolia (Bertol.) O. Kuntze collected in the city of Passo Fundo, located in the state of Rio Grande do Sul (RS), Brazil. These samples were previously studied by Rigozo et al. (2008); however, their main interest was to search for the solar periodicities in the tree-ring width mean time series without interpreting the rest of the periodicities found. The question arises as to what are the drivers related to those periodicities. For this reason, the classical method of spectral analysis by iterative regression and wavelet methods are applied to find periodicities and trends present in each tree-ring growth, in Southern Oscillation Index (SOI), and in annual mean temperature anomaly between the 24 and 44 • S. In order to address the aforementioned question, this paper discusses the correlation between the growth rate of the tree rings with temperature and SOI. In each tree-ring growth series, periods between 2 and 7 years were found, possibly related to the El Niño/La Niña phenomena, and a ∼ 23-year period was found, which may be related to temperature variation. These novel results might represent the tree-ring growth response to local climate conditions during its lifetime, and to nonlinear coupling between the Sun and the local climate variability responsible to the regional climate variations.

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“…Also, Rampelotto et al (2012) used the cross wavelet between rainfall and temperature versus the ENSO and reported periodicities of 2-8 years; the cross wavelet of rainfall and temperature versus sunspot number allowed them to find the periodicity of the solar cycle (11 years). By applying the wavelet analysis of the total annual precipitation falling on Pelotas in southern Brazil, Souza Echer et al (2008) reported periodicities of around 2-6 years.…”

Section: Resultsmentioning

confidence: 99%

Mexican forest fires and their decadal variations

Herrera

2016

Advances in Space Research

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A high forest fire season of two to three years is regularly observed each decade in Mexican forests. This seems to be related to the presence of the El Niñ o phenomenon and to the amount of total solar irradiance. In this study, the results of a multi-cross wavelet analysis are reported based on the occurrence of Mexican forest fires, El Niñ o and the total solar irradiance for the period 1970-2014. The analysis shows that Mexican forest fires and the strongest El Niñ o phenomena occur mostly around the minima of the solar cycle. This suggests that the total solar irradiance minima provide the appropriate climatological conditions for the occurrence of these forest fires. The next high season for Mexican forest fires could start in the next solar minimum, which will take place between the years 2017 and 2019. A complementary space analysis based on MODIS active fire data for Mexican forest fires from 2005 to 2014 shows that most of these fires occur in cedar and pine forests, on savannas and pasturelands, and in the central jungles of the Atlantic and Pacific coasts.

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

Cited by 23 publications

References 75 publications

Evidence for cosmic ray modulation in temperature records from the South Atlantic Magnetic Anomaly region

Evidence for cosmic ray modulation in temperature records from the South Atlantic Magnetic Anomaly region

Araucaria growth response to solar and climate variability in South Brazil

Mexican forest fires and their decadal variations

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