Regional Climates
    Impacts of El Niño, National Oceanic and Atmospheric Administration
    Atmospheric Consequences of El Niño, University of Illinois at Urbana-Champaign
    The Relationship Between El Niño and California Rainfall, Golden Gate Weather Services

Ecosystems
    Effects of ENSO on Sea Birds, Wesleyan University
    Effects of ENSO on Coral Reefs, Wesleyan University

Economy
    Economic Consequences of El Niño, University of Illinois at Urbana-Champaign