Supplementary Table 1 Slope parameter μ of the regression line for EN events. Values at the 95% confidence level from a least-squares regression line adjusted from a fixed number of points with dT/dt = 0 between 160° W and 90° W. EN event Slope μ Years month·degree–1 1902 – 1903 1911 – 1912 1914 – 1915 1918 – 1919 1925 – 1926 1930 – 1931 1940 – 1941 1951 – 1952 1957 – 1958 1963 – 1964 1965 – 1966 1968 – 1969 1972 – 1973 1976 – 1977 1979 – 1980 1982 – 1983 1986 – 1987 1991 – 1992 1994 – 1995 1997 – 1998 2002 – 2003 2004 – 2005 2006 – 2007 2009 – 2010 –0.067 –0.037 0.048 –0.065 –0.055 –0.050 0.117 –0.059 –0.019 –0.023 –0.070 0.048 –0.023 –0.080 –0.157 0.064 0.025 –0.010 –0.053 0.026 –0.017 0.070 –0.060 –0.018 ARTICLE TITLE: Changes in the zonal propagation of El Niño-related SST anomalies: A possible link to the PDO Submitted to THEORETICAL AND APPLIED CLIMATOLOGY. Authors: Pablo L. Antico * and Vicente R. Barros * Corresponding author affiliation: Consejo Nacional de Investigaciones Científicas y Técnicas, Argentina. Departamento de Ciencias de la Atmósfera y los Océanos, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Güiraldes 2160, Ciudad Universitaria, C1428EGA, Argentina. Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata, Paseo del Bosque s/n, B1900FWA, Argentina. * Corresponding author: E-mail: antico@at.fcen.uba.ar; Tel: (++54 +11) 4576-3356 ext. 22; Fax: (++54 +11) 4576-3356 ext. 12