Auxiliary material for Paper [#2014GLXXXXXX] Spring persistence, transition and resurgence of El Niņo Sang-Ki Lee (1,2), Pedro N. DiNezio (3), Eui-Seok Chung (4), Sang-Wook Yeh (5), Andrew T. Wittenberg (6), and Chunzai Wang (2) 1: Cooperative Institute for Marine and Atmospheric Studies, University of Miami, Miami, Florida 2: NOAA Atlantic Oceanographic and Meteorological Laboratory, Miami, Florida 3: International Pacific Research Center, School of Ocean and Earth Science and Technology, University of Hawaii at Manoa, Honolulu, Hawaii 4: Rosenstiel School of Marine and Atmospheric Sciences, University of Miami, Miami, Florida 5: Department of Marine Sciences and Convergent Technology, Hanyang University, Ansan, Korea 6: NOAA Geophysical Fluid Dynamics Laboratory, Princeton, New Jersey Lee, S.-K., P. N. DiNezio, E.-S. Chung, S.-W. Yeh, A. T. Wittenberg and C. Wang: Spring persistence, transition and resurgence of El Niņo, Geophys. Res. Lett., doi:10.1029/2014GLXXXXXX. Introduction The auxiliary material contains two figures. Auxiliary Material Figure S1 shows the time-longitude plots of the tropical Pacific SST anomalies averaged between 5S and 5N for 21 El Ninos that occurred during 1949-2013, derived from ERSST3. Units are degC. Auxiliary Material Figure S2 shows the time-longitude plots of the equatorial Pacific SST (color shade) and rainfall (contour) anomalies averaged between 5S and 5N, for (a) CM, (b) CM+EOF1, (c) CM-EOF1, (e) CM+EOF2, and (f) CM-EOF2 of the 21 El Ninos during 19492013. NOAA's precipitation reconstruction [Chen et al., 2002] is used to compute the rainfall anomalies. The units are degC for SST, and mm/day for rainfall. Lee_etal_2014_supp.pdf This file contains two auxiliary figures.