A 200-year record of Caribbean and tropical North Atlantic hydrographic variability

David E. Black, Robert C. Thunell, Alexey Kaplan, Larry C Peterson, Eric J. Tappa

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

Here we present near-annually resolved oxygen isotope records from two species of planktic foraminifera from the Cariaco Basin that reflect sea surface temperature (SST) and Intertropical Convergence Zone (ITCZ) precipitation-related salinity variations over the Caribbean and tropical North Atlantic spanning the last 2000 years. A strong, broad spatial pattern of correlation exists between foraminiferal δ18O and SSTs over the period of instrumental overlap, but the correlations weaken as they are extended back in time and instrumental SST records become discontinuous. A long-term trend in the Globigerinoides ruber δ18O record can be explained by two different but equally plausible scenarios. First, the increase in δ18O may indicate that tropical summer-fall SSTs have cooled by as much as 2°C over the last 2000 years, possibly as a result of a long-term increase in upwelling intensity. Alternately, comparisons to other studies of ITCZ and regional evaporation/precipitation variability suggest that much of the δ18O record is influenced by decadal- to centennial-scale variations in the mean annual position of the ITCZ and associated rainfall patterns. Similarities between the G. bulloides δ18O record and the 11-year sunspot cycle support prior studies that suggest solar variability plays a role in influencing the hydrologic balance of the circum-Caribbean.

Original languageEnglish (US)
JournalPaleoceanography
Volume19
Issue number2
DOIs
StatePublished - Jun 2004

Fingerprint

intertropical convergence zone
sea surface temperature
sunspot
foraminifera
oxygen isotope
upwelling
evaporation
salinity
rainfall
summer
basin

Keywords

  • Late Holocene climate variability
  • Oxygen isotopes
  • Tropical paleoceanography

ASJC Scopus subject areas

  • Oceanography
  • Palaeontology

Cite this

A 200-year record of Caribbean and tropical North Atlantic hydrographic variability. / Black, David E.; Thunell, Robert C.; Kaplan, Alexey; Peterson, Larry C; Tappa, Eric J.

In: Paleoceanography, Vol. 19, No. 2, 06.2004.

Research output: Contribution to journalArticle

Black, David E. ; Thunell, Robert C. ; Kaplan, Alexey ; Peterson, Larry C ; Tappa, Eric J. / A 200-year record of Caribbean and tropical North Atlantic hydrographic variability. In: Paleoceanography. 2004 ; Vol. 19, No. 2.
@article{d5340cc3fe754d5ba668c9b65d9f013c,
title = "A 200-year record of Caribbean and tropical North Atlantic hydrographic variability",
abstract = "Here we present near-annually resolved oxygen isotope records from two species of planktic foraminifera from the Cariaco Basin that reflect sea surface temperature (SST) and Intertropical Convergence Zone (ITCZ) precipitation-related salinity variations over the Caribbean and tropical North Atlantic spanning the last 2000 years. A strong, broad spatial pattern of correlation exists between foraminiferal δ18O and SSTs over the period of instrumental overlap, but the correlations weaken as they are extended back in time and instrumental SST records become discontinuous. A long-term trend in the Globigerinoides ruber δ18O record can be explained by two different but equally plausible scenarios. First, the increase in δ18O may indicate that tropical summer-fall SSTs have cooled by as much as 2°C over the last 2000 years, possibly as a result of a long-term increase in upwelling intensity. Alternately, comparisons to other studies of ITCZ and regional evaporation/precipitation variability suggest that much of the δ18O record is influenced by decadal- to centennial-scale variations in the mean annual position of the ITCZ and associated rainfall patterns. Similarities between the G. bulloides δ18O record and the 11-year sunspot cycle support prior studies that suggest solar variability plays a role in influencing the hydrologic balance of the circum-Caribbean.",
keywords = "Late Holocene climate variability, Oxygen isotopes, Tropical paleoceanography",
author = "Black, {David E.} and Thunell, {Robert C.} and Alexey Kaplan and Peterson, {Larry C} and Tappa, {Eric J.}",
year = "2004",
month = "6",
doi = "10.1029/2003PA000982",
language = "English (US)",
volume = "19",
journal = "Paleoceanography and Paleoclimatology",
issn = "2572-4517",
publisher = "American Geophysical Union",
number = "2",

}

TY - JOUR

T1 - A 200-year record of Caribbean and tropical North Atlantic hydrographic variability

AU - Black, David E.

AU - Thunell, Robert C.

AU - Kaplan, Alexey

AU - Peterson, Larry C

AU - Tappa, Eric J.

PY - 2004/6

Y1 - 2004/6

N2 - Here we present near-annually resolved oxygen isotope records from two species of planktic foraminifera from the Cariaco Basin that reflect sea surface temperature (SST) and Intertropical Convergence Zone (ITCZ) precipitation-related salinity variations over the Caribbean and tropical North Atlantic spanning the last 2000 years. A strong, broad spatial pattern of correlation exists between foraminiferal δ18O and SSTs over the period of instrumental overlap, but the correlations weaken as they are extended back in time and instrumental SST records become discontinuous. A long-term trend in the Globigerinoides ruber δ18O record can be explained by two different but equally plausible scenarios. First, the increase in δ18O may indicate that tropical summer-fall SSTs have cooled by as much as 2°C over the last 2000 years, possibly as a result of a long-term increase in upwelling intensity. Alternately, comparisons to other studies of ITCZ and regional evaporation/precipitation variability suggest that much of the δ18O record is influenced by decadal- to centennial-scale variations in the mean annual position of the ITCZ and associated rainfall patterns. Similarities between the G. bulloides δ18O record and the 11-year sunspot cycle support prior studies that suggest solar variability plays a role in influencing the hydrologic balance of the circum-Caribbean.

AB - Here we present near-annually resolved oxygen isotope records from two species of planktic foraminifera from the Cariaco Basin that reflect sea surface temperature (SST) and Intertropical Convergence Zone (ITCZ) precipitation-related salinity variations over the Caribbean and tropical North Atlantic spanning the last 2000 years. A strong, broad spatial pattern of correlation exists between foraminiferal δ18O and SSTs over the period of instrumental overlap, but the correlations weaken as they are extended back in time and instrumental SST records become discontinuous. A long-term trend in the Globigerinoides ruber δ18O record can be explained by two different but equally plausible scenarios. First, the increase in δ18O may indicate that tropical summer-fall SSTs have cooled by as much as 2°C over the last 2000 years, possibly as a result of a long-term increase in upwelling intensity. Alternately, comparisons to other studies of ITCZ and regional evaporation/precipitation variability suggest that much of the δ18O record is influenced by decadal- to centennial-scale variations in the mean annual position of the ITCZ and associated rainfall patterns. Similarities between the G. bulloides δ18O record and the 11-year sunspot cycle support prior studies that suggest solar variability plays a role in influencing the hydrologic balance of the circum-Caribbean.

KW - Late Holocene climate variability

KW - Oxygen isotopes

KW - Tropical paleoceanography

UR - http://www.scopus.com/inward/record.url?scp=4544282387&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=4544282387&partnerID=8YFLogxK

U2 - 10.1029/2003PA000982

DO - 10.1029/2003PA000982

M3 - Article

AN - SCOPUS:4544282387

VL - 19

JO - Paleoceanography and Paleoclimatology

JF - Paleoceanography and Paleoclimatology

SN - 2572-4517

IS - 2

ER -