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This is the PDF linked from the foornote in the wikipedia article:

If I understand the issue correctly, Oetscher is claiming that diffusion of gas in firn explains the 83-year shift.

We have met the enemy, and he is us — Pogo
by Migeru (migeru at eurotrib dot com) on Mon Jan 28th, 2008 at 11:47:15 AM EST
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