Les « sauts » passés de CO2 atmosphérique
一项由IGE（法国国家科学研究中心/国家农业食品与环境研究院/发展研究所/格勒诺布尔-阿尔卑斯大学/格勒诺布尔理工学院）主导的Hotclim项目，联合LSCE（法国原子能和替代能源委员会/国家科学研究中心/凡尔赛大学）等国际研究团队，揭示了在过去50万年中大气二氧化碳浓度曾多次出现被称为“二氧化碳跃升”的快速变化事件。
研究发现，这些历史上发生的重大浓度跃升事件，其变化速率仍仅为当前人类活动导致的二氧化碳浓度增速的十分之一。这一对比凸显了工业化以来人类排放对大气成分影响的剧烈程度已远超自然变率。
New research from the international Hotclim project, led by the Institute of Environmental Geosciences (IGE) and involving the Laboratory of Climate and Environmental Sciences (LSCE), has identified rapid fluctuations in atmospheric carbon dioxide concentrations over the past 500,000 years. These events, termed "CO2 jumps," represent significant natural variations in the climate record.
The study reveals that these historical jumps, while substantial, occurred at a rate approximately ten times slower than the current anthropogenic-driven increase in CO2 levels. This stark comparison underscores the unprecedented pace of modern carbon emissions compared to natural variability over the last half-million years.
De nouvelles variations rapides des concentrations de dioxyde de carbone dans l'atmosphère au cours des 500 000 dernières années, appelées « sauts de CO2 », ont été mises en évidence par le projet Hotclim de l’IGE (CNRS/Inrae/IRD/UGA/Grenoble INP). Associant le LSCE (CEA/CNRS/UVSQ), l’étude internationale montre que ces évènements pourtant majeurs sont dix fois inférieurs au taux d’augmentation actuel des concentrations de CO2 d’origine anthropique.
A French-led climate study found past rapid atmospheric CO2 “jumps” over the last 500,000 years, but they were still about 10x slower than today’s human-driven rise, underscoring the severity of current emissions.
IGE — climate and environmental research institute, Grenoble, France.
CNRS — French national research organization, France.
Inrae — French agricultural and environmental research institute, France.
IRD — French research institute for sustainable development, France.
UGA — Université Grenoble Alpes, Grenoble, France.
Grenoble INP — engineering school group, Grenoble, France.
LSCE — climate and environmental sciences lab, France.
CEA — French alternative energies and atomic energy commission, France.
UVSQ — Université de Versailles Saint-Quentin-en-Yvelines, France.
Monitor — important for climate-policy and energy-transition context, but not a direct tech or market event.