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Howie Spero and I, along with a group of amazlingly tallented graduate students in a paleoclimate class, generated stable isotope data on single shells of over 10 species of planktic foraminifera. The data was generated on sediment obtained from two different global locations from the Holocene (core top) and the Last Glacial Maximum. The raw isotope data highlight seasonal/population variability within a species and differences among the species highlight differences in depth habitat AND species offsets in the stable isotopes from equilibrium. We have developed corrections for these offsets and will show how we can use these corrections in the past to gain information about the carbon/oxygen isotope gradient (upper water column structure) in the past in both locations.
Stay tuned, results will be posted here after we submit the paper for peer review. |
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