Interdecadal variability of the upwelling season off southern-central Chile (37ºS): impact on common sardine (Strangomera bentincki). ALDO MONTECINOS 1,* AND FABIÁN GÓMEZ 1,2 1 Departamento de Geofísica, Universidad de Concepción, Chile 2 Departamento de Oceanografía, Universidad de Concepción, Chile * Correspondence: Aldo Montecinos, Departamento de Geofísica, Universidad de Concepción, Casilla 160-C, Concepción, Chile. (Phone: 56-41-2207278; Fax: 56-41-2220104; e-mail: amonteci@dgeo.udec.cl) Running title: Interdecadal upwelling season variability and fishery