What are the units for the pollen population models shown?

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The discussion centers around a pollen viewer tool that displays historical plant populations from 21,000 BC to the present. Participants inquire about the units used in the models, with clarification provided that pollen diagrams typically measure pollen count per cubic centimeter. A specific diagram is highlighted for its interest, with a note on a dating discrepancy of 34 years that affects the transition to the Younger Dryas period. The corrected dating aligns closely with the GISP ice core data, although the error margin diminishes the perceived accuracy of the findings.
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Can't see the link So I'm not sure what exactly you want to know. Pollen diagrams like http://home.wanadoo.nl/bijkerk/meerfelder.GIF show the pollen count per cubic centimeter. You see filled black graphs and open white, that's a difference in order of magnitude. This specific one is extremely interesting. I have to write the others sometimes that their dating is 34 years off. The correction would bring their transition to the Younger Dryas to 11,654 years ago, whereas the transitition in the GISP ice core is 11,652 years. Unfortunately the error margin (+29 -26 years) spoils the apparent accuracy.
 
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http://img212.imageshack.us/img212/1760/snapshot200603041157516tz.png
Here it is.
 
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