final_program_abstracts[1]

11 IMSC Session Program
Joint diagnostic of the surface air temperature in South
America and Madden-Julian Oscillation
Wednesday - Poster Session 5
Gustavo Naumann and Walter M. Vargas
National Scientific and Technological Research Council (CONICET), Department of
Atmospheric and Oceanic Sciences, University of Buenos Aires, Argentina
The objective of this research is to explore the relationship between maximum and
minimum temperatures, daily precipitation, and the Madden-Julian Oscillation (MJO).
It was found that the different phases of the MJO show a consistent signal on winter
temperature variability and precipitation in southeastern South America. Additionally,
this paper explores the spatial-temporal variations of mutual information and joint
entropy between temperature and the MJO. A defined spatial pattern was observed
with an increased signal in northeastern Argentina and southern Brazil. In the local
mutual information analysis, periods in which the mutual information doubled the
average values were observed over the entire region. These results indicate that these
connections can be used to forecast winter temperatures with a better skill score in
situations where both variables covary.
Abstracts 207