Artículos de revistas
Joint diagnostic of the surface air temperature in southern South America and the Madden–Julian oscillation
Fecha
2010-08Registro en:
Naumann, Gustavo; Vargas, Walter Mario; Joint diagnostic of the surface air temperature in southern South America and the Madden–Julian oscillation; American Meteorological Society; Weather And Forecasting; 75; 8-2010; 1275-1280
0882-8156
Autor
Naumann, Gustavo
Vargas, Walter Mario
Resumen
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.