Intensified decadal variability in tropical climate during the late 19th century

Toby R. Ault, Julia Cole, Michael N. Evans, Heidi Barnett, Nerilie J. Abram, Alexander W. Tudhope, Braddock K. Linsley

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

To evaluate and extend the record of decadal climate variability, we present a synthesis of 23 coral oxygen isotope records from the tropical Indo-Pacific that extends back to A.D. 1850. Principal components analysis (PCA) on detrended records reveals a leading pattern of variance with significant interannual (3-5 year) and decadal (9-14 year) variability. The temporal evolution and spatial pattern of this variability closely resembles the El Nino/Southern Oscillation (ENSO) pattern across both time scales, suggesting that this decadal tropical variability is fundamentally related to ENSO. The 19th century experienced stronger decadal tropical climate variability, compared to the 20th. Decadal variability in the tropical oceans thus remains underestimated by analysis of direct observations.

Original languageEnglish (US)
Article numberL08602
JournalGeophysical Research Letters
Volume36
Issue number8
DOIs
StatePublished - Apr 28 2009

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climate
El Nino-Southern Oscillation
Southern Oscillation
el Nino
temporal evolution
oxygen isotope
coral
principal component analysis
timescale
oxygen isotopes
ocean
principal components analysis
tropical climate
oceans
synthesis
analysis

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Geophysics

Cite this

Ault, T. R., Cole, J., Evans, M. N., Barnett, H., Abram, N. J., Tudhope, A. W., & Linsley, B. K. (2009). Intensified decadal variability in tropical climate during the late 19th century. Geophysical Research Letters, 36(8), [L08602]. https://doi.org/10.1029/2008GL036924

Intensified decadal variability in tropical climate during the late 19th century. / Ault, Toby R.; Cole, Julia; Evans, Michael N.; Barnett, Heidi; Abram, Nerilie J.; Tudhope, Alexander W.; Linsley, Braddock K.

In: Geophysical Research Letters, Vol. 36, No. 8, L08602, 28.04.2009.

Research output: Contribution to journalArticle

Ault, TR, Cole, J, Evans, MN, Barnett, H, Abram, NJ, Tudhope, AW & Linsley, BK 2009, 'Intensified decadal variability in tropical climate during the late 19th century', Geophysical Research Letters, vol. 36, no. 8, L08602. https://doi.org/10.1029/2008GL036924
Ault, Toby R. ; Cole, Julia ; Evans, Michael N. ; Barnett, Heidi ; Abram, Nerilie J. ; Tudhope, Alexander W. ; Linsley, Braddock K. / Intensified decadal variability in tropical climate during the late 19th century. In: Geophysical Research Letters. 2009 ; Vol. 36, No. 8.
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