Recent Variability in the Southern Oscillation - Isotopic Results from a Tarawa Atoll Coral

Publication Status is "Submitted" Or "In Press: 
LDEO Publication: 
Publication Type: 
Year of Publication: 
1993
Editor: 
Journal Title: 
Science
Journal Date: 
Jun 18
Place Published: 
Tertiary Title: 
Volume: 
260
Issue: 
5115
Pages: 
1790-1793
Section / Start page: 
Publisher: 
ISBN Number: 
0036-8075
ISSN Number: 
Edition: 
Short Title: 
Accession Number: 
ISI:A1993LH20500045
LDEO Publication Number: 
Call Number: 
Abstract: 

In the western tropical Pacific, the interannual migration of the Indonesian Low convective system causes changes in rainfall that dominate the regional signature of the El Nino-Southern Oscillation (ENSO) system. A 96-year oxygen isotope record from a Tarawa Atoll coral (1-degrees-N, 172-degrees-E) reflects regional convective activity through rainfall-induced salinity changes. This monthly resolution record spans twice the length of the local climatological record and provides a history of ENSO variability comparable in quality with those derived from instrumental climate data. Comparison of this coral record with a historical chronology of El Nino events indicates that climate anomalies in coastal South America are occasionally decoupled from Pacific-wide ENSO extremes. Spectral analysis suggests that the distribution of variance in this record has shifted among annual to interannual periods during the present century, concurrent with observed changes in the strength of the Southern Oscillation.

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Lh205Times Cited:141Cited References Count:44

DOI: