Palaeoclimate reconstructions reveal a strong link between El niño-southern oscillation and tropical pacific mean state

Aleksey Yu Sadekov, Raja Ganeshram, Laetitia Pichevin, Rose Berdin, Erin McClymont, Henry Elderfield, Alexander W. Tudhope

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

The El Niño-Southern Oscillation (ENSO) is one of the most important components of the global climate system, but its potential response to an anthropogenic increase in atmospheric CO 2 remains largely unknown. One of the major limitations in ENSO prediction is our poor understanding of the relationship between ENSO variability and long-term changes in Tropical Pacific oceanography. Here we investigate this relationship using palaeorecords derived from the geochemistry of planktonic foraminifera. Our results indicate a strong negative correlation between ENSO variability and zonal gradient of sea-surface temperatures across the Tropical Pacific during the last 22 ky. This strong correlation implies a mechanistic link that tightly couples zonal sea-surface temperature gradient and ENSO variability during large climate changes and provides a unique insight into potential ENSO evolution in the future by suggesting enhanced ENSO variability under a global warming scenario.

Original languageEnglish
Article number2692
JournalNature Communications
Volume4
DOIs
Publication statusPublished - 2013
Externally publishedYes

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Pacific States
Southern Oscillation
Oceans and Seas
Oceanography
Foraminifera
Global Warming
Temperature
Geochemistry
Climate Change
Global warming
Carbon Monoxide
Climate
Climate change
Thermal gradients
sea surface temperature
oceanography
global warming
climate change
geochemistry
climate

Cite this

Sadekov, Aleksey Yu ; Ganeshram, Raja ; Pichevin, Laetitia ; Berdin, Rose ; McClymont, Erin ; Elderfield, Henry ; Tudhope, Alexander W. / Palaeoclimate reconstructions reveal a strong link between El niño-southern oscillation and tropical pacific mean state. In: Nature Communications. 2013 ; Vol. 4.
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abstract = "The El Ni{\~n}o-Southern Oscillation (ENSO) is one of the most important components of the global climate system, but its potential response to an anthropogenic increase in atmospheric CO 2 remains largely unknown. One of the major limitations in ENSO prediction is our poor understanding of the relationship between ENSO variability and long-term changes in Tropical Pacific oceanography. Here we investigate this relationship using palaeorecords derived from the geochemistry of planktonic foraminifera. Our results indicate a strong negative correlation between ENSO variability and zonal gradient of sea-surface temperatures across the Tropical Pacific during the last 22 ky. This strong correlation implies a mechanistic link that tightly couples zonal sea-surface temperature gradient and ENSO variability during large climate changes and provides a unique insight into potential ENSO evolution in the future by suggesting enhanced ENSO variability under a global warming scenario.",
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Palaeoclimate reconstructions reveal a strong link between El niño-southern oscillation and tropical pacific mean state. / Sadekov, Aleksey Yu; Ganeshram, Raja; Pichevin, Laetitia; Berdin, Rose; McClymont, Erin; Elderfield, Henry; Tudhope, Alexander W.

In: Nature Communications, Vol. 4, 2692, 2013.

Research output: Contribution to journalArticle

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AU - Sadekov, Aleksey Yu

AU - Ganeshram, Raja

AU - Pichevin, Laetitia

AU - Berdin, Rose

AU - McClymont, Erin

AU - Elderfield, Henry

AU - Tudhope, Alexander W.

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