Core Insights - The research team led by researcher Chen Jitao from the Nanjing Institute of Geology and Palaeontology has discovered that global warming, under current icehouse climate and high oxygen conditions, may lead to widespread ocean deoxygenation, similar to the Late Paleozoic Ice Age [1][2] Group 1: Research Findings - The Late Paleozoic Ice Age is noted as the longest icehouse climate period since the establishment of terrestrial higher plants and ecosystems, with atmospheric CO2 levels spanning from pre-industrial levels to future high carbon emission scenarios [2] - The exceptionally high oxygen environment during this period may be linked to the gigantism of marine and terrestrial animals and could have triggered the major marine biological radiation event from the mid-Carboniferous to the early Permian [2] - The research team studied carbonate rock sediment sequences from 310 to 290 million years ago in the Guizhou Luodian Basin, integrating carbon isotope data, atmospheric CO2 concentration, volcanic activity, and vegetation evolution to analyze global carbon cycling and ocean redox states [2] Group 2: Implications of Findings - The study found that increased organic carbon burial in the ocean during the research period likely led to a decrease in atmospheric CO2 concentration and an increase in oxygen concentration [2] - Intermittent massive carbon emissions could trigger repeated climate warming and seabed deoxygenation, potentially expanding the area of ocean deoxygenation to 4%-12%, which may lead to stagnation or decline in marine biodiversity [2]

△ 晚石炭世–早二叠世地质事件、海洋生物多样性及地球化学记录。 △基于贝叶斯马尔可夫链蒙特卡洛（MCMC）方法的碳-磷-铀模型结果及其与相关地化指标的对比。 尽管此时大气—海洋整体氧化水平很高，但间歇性的巨量碳排放也可以引起重复发生的气候变暖和海底缺氧，导致全球海洋缺氧面积扩张至4%—12%，甚 至可能导致海洋生物多样性停滞或下降。 △石炭–二叠纪之交古地理与华南罗甸盆地纳庆剖面柱状图。 这项研究表明，在当前的冰室气候和高氧化状态下，全球变暖可能会导致广泛的海洋缺氧。这一发现有助于我们更好地理解地球气候系统内部的关联与反馈 机制，为预测当前全球变暖背景下海洋环境的变化趋势具有重要参考价值。 记者从中国科学院南京地质古生物研究所获悉，该研究所陈吉涛研究员领衔的国际研究团队，联合南京大学、美国、新西兰、丹麦等国内外同行，近期开展 的一项关于高氧环境下全球变暖对海洋影响的研究成果，于北京时间6月24日在期刊《美国科学院院报》（PNAS）发表。 △古生代海洋生物多样性、大气成分与海洋氧化状态。 距今3.6–2.6亿年的晚古生代大冰期，是地球自陆生高等植物及陆地生态系统建立以来持续时间最长的冰室气候时期。这一时期，大气 ...