Holocene history of the El Niño phenomenon as recorded in flood sediments of northern coastal Peru

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 extre...

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Published in:Geology (Boulder) 1990-11, Vol.18 (11), p.1134-1137
Main Author: Wells, Lisa E
Format: Article
Language:English
Subjects:
absolute age
alluvium
Casma
Cenozoic
charcoal
clastic sediments
Climate
dates
El Nino
floodplains
Floods
fluvial features
geochronology
Holocene
Marine
northern Peru
ocean circulation
oceanography
Oceans
Pacific Ocean
paleo-oceanography
paleocirculation
paleoclimatology
paleocurrents
paleogeography
Peru
Quaternary
Quaternary geology
Rio Casma
Rio Sechin
sediments
South America
Weather
Wind
wood
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creator Wells, Lisa E
description 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.
doi_str_mv 10.1130/0091-7613(1990)018<1134:HHOTEN>2.3.CO;2
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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.</abstract><cop>Boulder</cop><pub>Geological Society of America (GSA)</pub><doi>10.1130/0091-7613(1990)018&lt;1134:HHOTEN&gt;2.3.CO;2</doi><tpages>4</tpages><oa>free_for_read</oa></addata></record>
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identifier ISSN: 0091-7613
ispartof Geology (Boulder), 1990-11, Vol.18 (11), p.1134-1137
issn 0091-7613
1943-2682
language eng
recordid cdi_proquest_miscellaneous_21023873
source GeoScienceWorld
subjects absolute age
alluvium
Casma
Cenozoic
charcoal
clastic sediments
Climate
dates
El Nino
floodplains
Floods
fluvial features
geochronology
Holocene
Marine
northern Peru
ocean circulation
oceanography
Oceans
Pacific Ocean
paleo-oceanography
paleocirculation
paleoclimatology
paleocurrents
paleogeography
Peru
Quaternary
Quaternary geology
Rio Casma
Rio Sechin
sediments
South America
Weather
Wind
wood
title Holocene history of the El Niño phenomenon as recorded in flood sediments of northern coastal Peru
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