To: Elsie; PatrickHenry
It's done electronically. The pH of ice varies between summer and winter thus leading to a difference in conduction across a core.
The core sections are compared with tree sections (visit Lone Pine and go up the mountain about 10,000 feet) and with varves. All are in agreement. For short periods (like back to the Age of the Pyramids) written evidence also agrees.
914 posted on
03/01/2006 9:43:51 AM PST by
Doctor Stochastic
(Vegetabilisch = chaotisch ist der Charakter der Modernen. - Friedrich Schlegel)
To: Doctor Stochastic
The pH of ice ...That's from the bad side of the family.
930 posted on
03/01/2006 10:29:50 AM PST by
PatrickHenry
(Virtual Ignore for trolls, lunatics, dotards, scolds, & incurable ignoramuses.)
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