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PALEOCEANOGRAPHY

Indian Ocean Sea Surface Temperature Reconstruction for last 150,000 years
Map of data site
Bard, E., F. Rostek, and C. Sonzogni. 1997. Interhemispheric synchrony of the last deglaciation inferred from alkenone palaeothermometry. Nature 385, 707-710.
Data Coverage North: 13.7 * South: -20.4
West: 36.33 * East: 53.25
Altitude: -4875 m

Start Year: 152600 14C yr BP * End Year: 0 14C yr BP

Data:     Please Cite Data Contributors!
 SynTraCE(development): md85674-sytr-tab.txt
 SynTraCE(development): t93929-p-sytr-tab.txt
 SynTraCE(development): m85668eb-sytr-tab.txt
 SynTraCE(development): md79257-sytr-tab.txt
  m85668eb-tab.txt
  md85674-tab.txt
  md79257-tab.txt
  t93929-p-tab.txt
  md90963-tab.txt
 bard1997

Summary:

The relative timings of the last deglacial warming in the Southern and Northern hemispheres are not well constrained, but are a crucial component in understanding the mechanisms of deglaciation. A clearer picture of the degree of interhemispheric synchrony has been obscured by a dearth of high-resolution temperature records that can be tied to the absolute calendar timescale. Moreover, the quantification of tropical temperatures during the last glacial cycle is controversial. Here we apply the alkenone method of sea surface temperature reconstruction to several high-resolution sediment cores recovered from the tropical Indian Ocean between 20° N and 20° S. The inferred initial sea surface temperature warming ~15,000 calendar years ago at 20° S is in phase with Northern Hemisphere sea (this study) and air temperature changes, but lags Antarctic warming by several millennia. This finding, along with the results of recent modelling studies provides strong support for the idea that changes in the ocean's global thermohaline circulation were not the only cause of interhemispheric climate teleconnection during the last deglaciation.
More Info on Paleoceanography Data

Parameters:

radiocarbon years before 1950AD; Sea Surface Temperature from Uk'37; calendar years before 1950AD

Complete XML Record:

noaa-ocean-9040  (Last Revised: 2010-03-04 )

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