A cold wave study in 2015 and its relationship with teleconnections patterns: a case study for Bauru city

• Grant number: 17/18805-6
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: December 01, 2017
• End date: November 30, 2018
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Meteorology
• Principal Investigator: Marta Pereira Llopart
• Grantee: Bruno César Capucin
• Host Institution: Faculdade de Ciências (FC). Universidade Estadual Paulista (UNESP). Campus de Bauru. Bauru , SP, Brazil

Abstract

Cold wave does not occur very frequently in the state of São Paulo during the winter, and this is due to the climatic variability that influences the intensity of the air masses when arriving in the Southeast of Brazil. Considered an extreme meteorological condition, the cold wave interfere in the routine of the urban centers and mainly in the rural areas, generating numerous problems, as for example, the occurrence of frosts. This work aims to investigate the teleconnections patterns, such as: Southern Annular Mode (AAO / SAM), El Niño Southern Oscillation (ENSO), sea ice concentration in the Antarctic region and sea surface temperature anomalies (SST), that may have interacted with a cold wave event occurred in Bauru city, associated with the cold front that passed through the region between July 4 to 6, 2015. Interim Era reanalysis will be used in this study, in order to perform a synoptic analysis, and data of the phases of the teleconnection indexes will used, to then relate them to the event of the cold wave observed in Bauru. It is expected that this research find out a relationship between the teleconnection indexes with the cold wave, and it is importance, due to the fact that in the occurrence of similar patterns the predictability of such phenomenon over the region will improved. (AU)