Unprecedented recent warming of surface temperatures in the eastern tropical Pacific Ocean

Jessica L. Conroy, Alejandra Restrepo, Jonathan Overpeck, Miriam Steinitz-Kannan, Julia Cole, Mark B. Bush, Paul A. Colinvaux

Research output: Contribution to journalArticle

86 Citations (Scopus)

Abstract

Through its intimate connection with the El Nĩo/Southern Oscillation system, climate variability in the tropical PacificOcean influences climate across much of the planet. But the history of temperature change in the tropical Pacific Ocean during recent millennia is poorly known: the available annually resolved records are discontinuous and rarely span more than a few centuries. Longer records at coarser temporal resolution suggest that significant oceanographic changes, observed at multi-year to multi-century resolution, have had important effects on global climate. Here we use a diatom record from El Junco Lake, Galápagos, to produce a calibrated, continuous record of sea surface temperature in the eastern tropical Pacific Ocean at subdecadal resolution, spanning the past 1,200 years. Our reconstruction reveals that the most recent 50 years are the warmest 50-year period within the record. Because our diatom-based sea surface temperature index resembles Northern Hemisphere temperature reconstructions, we suggest that with continued anthropogenic warming, the eastern tropical Pacific Ocean may continue to warm.

Original languageEnglish (US)
Pages (from-to)46-50
Number of pages5
JournalNature Geoscience
Volume2
Issue number1
DOIs
StatePublished - Jan 2009

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surface temperature
warming
ocean
diatom
sea surface temperature
Southern Oscillation
climate
global climate
Northern Hemisphere
planet
temperature
lake
history

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)

Cite this

Unprecedented recent warming of surface temperatures in the eastern tropical Pacific Ocean. / Conroy, Jessica L.; Restrepo, Alejandra; Overpeck, Jonathan; Steinitz-Kannan, Miriam; Cole, Julia; Bush, Mark B.; Colinvaux, Paul A.

In: Nature Geoscience, Vol. 2, No. 1, 01.2009, p. 46-50.

Research output: Contribution to journalArticle

Conroy, JL, Restrepo, A, Overpeck, J, Steinitz-Kannan, M, Cole, J, Bush, MB & Colinvaux, PA 2009, 'Unprecedented recent warming of surface temperatures in the eastern tropical Pacific Ocean', Nature Geoscience, vol. 2, no. 1, pp. 46-50. https://doi.org/10.1038/ngeo390
Conroy, Jessica L. ; Restrepo, Alejandra ; Overpeck, Jonathan ; Steinitz-Kannan, Miriam ; Cole, Julia ; Bush, Mark B. ; Colinvaux, Paul A. / Unprecedented recent warming of surface temperatures in the eastern tropical Pacific Ocean. In: Nature Geoscience. 2009 ; Vol. 2, No. 1. pp. 46-50.
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