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敦德冰芯上部９５ｍ的１２个样品记录了近８００ａ来冰内气泡包裹气体中甲烷的浓度变化，结果表明，最近２００ａ来该冰芯记录的甲烷浓度急剧上升，与南极及格棱兰的甲烷记录反映的趋势相一致，但与两极同时代样品相比，其浓度总体上要高出０．５×１００－６～０．６×１０－６ｍｏｌ／ｍｏｌ．在这之前，３者基本保持一致，在０７×１０－６～０．８×１０－６ｍｏｌ／ｍｏｌ之间波动．
Twelve samples from 95m above the core of Dundee ice core recorded the concentration of methane in the air bubble entrapped gas in the past 800 years. The results showed that the concentration of methane recorded in the ice core increased sharply in the past 200 years, compared with that of Antarctic and Gelianland Reflect the trend of the same, but compared with the bipolar samples of the same period, its overall concentration higher than 0.5 × 100-6 ~ 0.6 × 10-6mol / mol. Prior to this, the three basically the same, fluctuating between 07 × 10-6 ~ 0.8 × 10-6mol / mol.