We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
An approximately 15,000-year record of El Nino-driven alluviation in southwestern ecuador
- Authors
Rodbell DT; Seltzer GO; Anderson DM; Abbott MB; Enfield DB; Newman JH
- Abstract
Debris flows have deposited inorganic laminae in an alpine lake that is 75 kilometers east of the Pacific Ocean, in Ecuador. These storm-induced events were dated by radiocarbon, and the age of laminae that are less than 200 years old matches the historic record of El Nino events. From about 15,000 to about 7000 calendar years before the present, the periodicity of clastic deposition is greater than or equal to 15 years; thereafter, there is a progressive increase in frequency to periodicities of 2 to 8.5 years. This is the modern El Nino periodicity, which was established about 5000 calendar years before the present. This may reflect the onset of a steeper zonal sea surface temperature gradient, which was driven by enhanced trade winds.
- Publication
Science (New York, N.Y.), 1999, Vol 283, Issue 5401, p516
- ISSN
1095-9203
- Publication type
Journal Article
- DOI
10.1126/science.283.5401.516