Methane analyzed in the Byrd ice core

The Methane records from Byrd, Vostok and GRIP have been used to establish coherent timescales for the Antarctic cores with respect to the GRIP timescale over the period from 50...来自伯德（Byrd）、沃斯托克（Vostok）与GRIP的甲烷记录，已被用于构建50……时段内以GRIP时间标尺为参照的南极冰芯统一时间标尺。