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.

极地冰芯气泡中封存的空气，是重建全球碳循环以及探究过往温室气体与气候关联的珍贵档案。南极冰芯的高分辨率记录显示，在最近三次冰消期的变暖事件发生后600±400年期间，大气二氧化碳体积百万分比浓度（parts per million by volume）上升了80至100ppm。尽管冰期内气温持续显著降低，高浓度的二氧化碳仍可维持数千年；这种相位滞后的时长，大概率与此前暖期的持续时间相关——而暖期时长会调控陆地冰盖的变化与陆地生物圈的发育扩张。