Climate and carbon dioxide during the end-Permian hyperthermal biosphere crisis

对未来气候变化的预测是高度不确定和不受约束的，预测的全球平均温度是数百万年来没有见过的。过去的高温事件，全球过度变暖的时期，可以提供一些答案。我们建议探索二叠纪末的超高温事件，这导致了2.52亿年前地球历史上最大的大规模灭绝。以前的调查集中在对海洋的反应和影响上，但对陆地的后果知之甚少。大陆盆地出现了广泛的“红层”积累，其程度在任何其他时期都没有见过，温度比最新的二叠纪水平高出15摄氏度。我们的目标是模拟足以产生这些陆地温度和热带“死区”的气候，从而确定注入大气的二氧化碳量，因为目前的估计在最大危机时的百万分之856-2568之间变化很大。将这些数字缩小到一个现实的、可测试的古代危机水平，将使我们能够更准确地调整未来气候变化的模型。

Predictions of future climate change are highly uncertain and unconstrained, with projected global average temperatures not seen for many millions of years . Past hyperthermal events, times of excessive global warming, can provide some answers. We propose to explore the end-Permian hyperthermal event which drove the largest mass extinction in Earth's history, 252 million years ago. Previous investigation has focused on the response and impact on the ocean, but less is known about consequences on land. Continental basins saw extensive accumulation of 'red beds', to an extent not seen at any other time, and temperatures rose as much as 15 degrees C above latest Permian levels. We aim to model climates sufficient to generate these terrestrial temperatures and the tropical 'dead zone' and thereby determine the amount of carbon dioxide injected into the atmosphere, as current estimates vary wildly from 856-2568 parts per million at the time of maximum crisis. Narrowing down these figures to a realistic, and testable level for the ancient crisis will allow us to tune the models for future climate change more accurately.