ESS5
Prof. Jin-Yi Yu
Peruvian fisherman (1800’s):
named mysterious warm, nutrient-
poor waters “
El Niño
”
Sir Gilbert Walker (1924):
named East-West seesaw in sea
level pressure the “
Southern-
Oscillation
”
Jacob Bjerknes (1969):
explained
ENSO
feedbacks that
link the “El Niño” and “Southern
Oscillation” phenomena