Theory 104/New facility/Paleoclimate
Old Ice Needs a Core
The claim
The relationship between carbon dioxide and temperature over earlier glacial cycles can only be tested with ice older than the current record, because the existing core does not reach it.
01Mechanism
Proxy records outside ice are indirect; trapped air is direct.
02Prediction
A deeper core should extend the direct record.
03Refutation
Proxy agreement would remove the need.