Lisa E. Wells; Holocene history of the El Niño phenomenon as recorded in flood sediments of northern coastal Peru. Geology ; 18 (11): 1134–1137. doi: https://doi.org/10.1130/0091-7613(1990)018<1134:HHOTEN>2.3.CO;2
Download citation file:
Significant precipitation along the north-central coast of Peru (lat 5°-10°S) occurs exclusively during El Niño incursions of warm water into the Peruvian littoral. Flood deposits from this region therefore provide a proxy record of extreme El Niño events. I present a 3500 yr chronology of the extreme events based on radiocarbon dating of overbank flood sediments from the Rio Casma (lat 9.2°S).The flood-plain stratigraphy suggests that the El Niño phenomenon has occurred throughout the Holocene and that flood events much larger than that which occurred during 1982-1983 occur here at least once every 1000 yr.