Mechanisms of southern Caribbean SST variability over the last two millennia

Jennifer B. Wurtzel, David E. Black, Robert C. Thunell, Larry C Peterson, Eric J. Tappa, Shaily Rahman

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

We present a high-resolution Mg/Ca reconstruction of tropical Atlantic sea surface temperatures (SSTs) spanning the last 2000 years using seasonally representative foraminifera from the Cariaco Basin. The range of summer/fall SST over this interval is restricted to 1.5°C, while winter/spring SST varies by 4.5°C over the same time period suggesting that boreal winter variations control interannual SST variability in the tropical North Atlantic. Antiphasing between the two data sets, including a large divergence in the seasonal records circa 900 Common Era, can be explained by changes in Atlantic meridional overturning circulation and associated changes in surface/subsurface temperatures in the tropical North Atlantic as well as resultant changes in trade wind belt location and intensity. A statistically significant but nonlinear relation exists between reconstructed winter/spring temperatures and solar variability.

Original languageEnglish (US)
Pages (from-to)5954-5958
Number of pages5
JournalGeophysical Research Letters
Volume40
Issue number22
DOIs
StatePublished - Nov 28 2013

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Caribbean Sea
sea surface temperature
winter
trade wind
meridional circulation
foraminifera
surface temperature
summer
divergence
temperature
intervals
high resolution
basin

Keywords

  • Mg/Ca thermometry
  • multidecadal variability
  • paleoclimate
  • planktonic foraminifera
  • solar variability
  • tropical Atlantic SST

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Geophysics

Cite this

Mechanisms of southern Caribbean SST variability over the last two millennia. / Wurtzel, Jennifer B.; Black, David E.; Thunell, Robert C.; Peterson, Larry C; Tappa, Eric J.; Rahman, Shaily.

In: Geophysical Research Letters, Vol. 40, No. 22, 28.11.2013, p. 5954-5958.

Research output: Contribution to journalArticle

Wurtzel, JB, Black, DE, Thunell, RC, Peterson, LC, Tappa, EJ & Rahman, S 2013, 'Mechanisms of southern Caribbean SST variability over the last two millennia', Geophysical Research Letters, vol. 40, no. 22, pp. 5954-5958. https://doi.org/10.1002/2013GL058458
Wurtzel, Jennifer B. ; Black, David E. ; Thunell, Robert C. ; Peterson, Larry C ; Tappa, Eric J. ; Rahman, Shaily. / Mechanisms of southern Caribbean SST variability over the last two millennia. In: Geophysical Research Letters. 2013 ; Vol. 40, No. 22. pp. 5954-5958.
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