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Climate 2017, 5(1), 17; doi:10.3390/cli5010017

The Influence of the Antarctic Oscillation (AAO) on Cold Waves and Occurrence of Frosts in the State of Santa Catarina, Brazil

Applied Climatology Laboratory (LabClima), Federal University of Santa Catarina (UFSC), Trindade, Florianópolis 88040-900, Brazil
Agricultural Climatology Laboratory (Labclimagri), Federal University of Santa Catarina (UFSC), Admar Gonzaga Str., Itacorubi, Florianópolis 88034-000, Brazil
Author to whom correspondence should be addressed.
Academic Editors: Valdir Adilson Steinke, Charlei Aparecido da Silva and Yang Zhang
Received: 1 November 2016 / Revised: 20 February 2017 / Accepted: 24 February 2017 / Published: 2 March 2017
(This article belongs to the Special Issue Studies and Perspectives of Climatology in Brazil)
View Full-Text   |   Download PDF [1116 KB, uploaded 2 March 2017]   |  


This paper examines the relationship between the Antarctic Oscillation (AAO), cold waves and occurrence of frosts in the state of Santa Catarina, Brazil, during the winter quarter. Research on this topic can assist different spheres of society, such as public health and agriculture, since cold waves can influence and/or aggravate health problems and frosts can inflict economic losses especially in the agricultural sector. For the purpose of this paper, cold wave is considered as the event in which the daily average surface air temperature was at least two standard deviations below the average value of the series on the day and for two consecutive days or more. The data on the average air temperature and frost occurrences are provided by the Company of Agricultural Research and Rural Extension of Santa Catarina/Center for Environmental Information and Hydrometeorology (EPAGRI/CIRAM). The AAO was subjected to statistical analysis using significance tests for the averages (Student’s t-test) and variances (F-test) with a significance level of α = 5%. The results show that cold waves are unevenly distributed in the agroecological zones of Santa Catarina. It is found that the AAO is associated with the occurrence of frosts (in the agroecological zones represented by the municipalities of Itajaí and São José) in the state of Santa Catarina. View Full-Text
Keywords: cold waves; frost; winter; Antarctic Oscillation; Santa Catarina; Brazil cold waves; frost; winter; Antarctic Oscillation; Santa Catarina; Brazil

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Alves, M.P.A.; Brito Silveira, R.; Boligon Minuzzi, R.; Elvino Franke, A. The Influence of the Antarctic Oscillation (AAO) on Cold Waves and Occurrence of Frosts in the State of Santa Catarina, Brazil. Climate 2017, 5, 17.

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