Investigating dynamical features in the long-term daily maximum temperature time series recorded at Adrián Jara, Paraguay

Research Article - Solid Earth Sciences
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Abstract

In this study, we analyse the daily series of maximum temperature measured at Adrián Jara, Paraguay, to disclose features possibly linked with climatological indices that are thought to regulate, in general, the climatic variability of South America. This station is well suited to perform this investigation because it is located in a rural not urbanized area. Our findings reveal that the analyzed series is modulated by several cycles: the annual and half-annual cycle; the 8-year cycle that could be driven by 8-year cycle of the baroclinic waves at the Southern Hemisphere; the 2–3-year periodicity, which seems linked with the Pacific Decadal Oscillation; the 15–16 years periodicity that seems to be induced by the low-frequency fluctuations of SST in the North Atlantic. It is also found an apparent shift in the maximum temperature in the late 1989 that seems to be in agreement with similar findings by other studies that documented such potential jump in the climate system.

Keywords

Temperature Paraguay Statistical analysis 

Notes

Acknowledgements

The authors acknowledge the financial support of CNR (Italy) and CONACYT (Paraguay).

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Copyright information

© Institute of Geophysics, Polish Academy of Sciences & Polish Academy of Sciences 2018

Authors and Affiliations

  1. 1.Consiglio Nazionale delle Ricerche, Istituto di Metodologie per l’Analisi AmbientaleTitoItaly
  2. 2.Facultad de Ciencias y Tecnología, Centro de Tecnología ApropiadaUniversidad Católica Nuestra Señora de la AsunciónAsunciónParaguay

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