NOAA/WDS Paleoclimatology - Vostok Ice Core CO2 Data, 1105-2856m

Air trapped in bubbles in polar ice cores constitutes an archive for the reconstruction of the global carbon cycle and the relation between greenhouse gases and climate in the past. High-resolution records from Antarctic ice cores show that carbon dioxide concentrations increased by 80 to 100 parts per million by volume 600 ± 400 years after the warming of the last three deglaciations. Despite strongly decreasing temperatures, high carbon dioxide concentrations can be sustained for thousands of years during glaciations; the size of this phase lag is probably connected to the duration of the preceding warm period, which controls the change in land ice coverage and the buildup of the terrestrial biosphere.

极地冰芯（ice core）气泡内封存的古大气，是重建全球碳循环以及过去温室气体与气候相互关系的关键档案。南极冰芯的高分辨率记录显示，在末次三次冰消期变暖后的600±400年，二氧化碳体积浓度提升了80至100个百万分比。尽管冰期内温度持续大幅下降，高浓度二氧化碳仍可维持数千年；该相位滞后的时长大概率与此前暖期的持续时间相关，而暖期时长决定了陆地冰覆盖的变化与陆地生物圈的规模扩张。