Dynamics and synoptic characteristics of extreme dry periods over the Southeast of Brazil and its relation to the South Atlantic SST - characterization of dry extreme events and simulations with climate models in IPCC scenarios

• Grant number: 12/14316-7
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• Effective date (Start): January 07, 2013
• Effective date (End): July 06, 2013
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Meteorology
• Principal Investigator: Tercio Ambrizzi
• Grantee: Luana Albertani Pampuch Bortolozo
• Supervisor: Luis Gimeno Presa
• Host Institution: Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Research place: Universidade de Vigo, Spain
• Associated to the scholarship: 11/08191-4 - Synoptic and Dynamics Features of Extreme Dry Periods on the Southeast of Brazil and its Relation to the South Atlantic SST, BP.DR

Abstract

In analyzes conducted until now in the PhD project, it was found through analysis of linear correlations between SST anomalies in predetermined regions in the Atlantic Ocean and precipitation anomalies in southeastern Brazil, there is a relationship between dry extreme events and SST variability in the South Atlantic Ocean in winter (June, July and August).Analysis using the method of Singular Value Decomposition (SVD) also showed that this relationship exists. The analysis of heterogeneous correlation maps from the calculation of the SVD using precipitation anomalies and SST anomalies show where these relationships occur. Negative precipitation anomalies in southeastern Brazil appear to be associated with positive SST anomalies in the region 35 ° S - 50 º S and 60 º W-35 ° W.Clearly, a better characterization of the extreme dry events it becomes necessary to improve the work, as well as the use of a global climate model simulations to evaluate the findings. The same model can be used with projections of future climate to assess and compare the occurrence of these events in future periods. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

PAMPUCH, LUANA ALBERTANI; DRUMOND, ANITA; GIMENO, LUIS; AMBRIZZI, TERCIO. Anomalous patterns of SST and moisture sources in the South Atlantic Ocean associated with dry events in southeastern Brazil. INTERNATIONAL JOURNAL OF CLIMATOLOGY, v. 36, n. 15, p. 4913-4928, DEC 2016. (11/08191-4, 12/14316-7, 08/58101-9, 08/57719-9)