Abstract Sea level fluctuation is common in the stratigraphical record and is partly explained by periodic polar glaciation. Such fluctuation in the absence of polar glaciation, during the warm periods of Earth's history, is poorly understood and currently under discussion. Here, I reconsider the palaeo-environmental information extracted from the variation in the carbon-isotope record and explain the phenomenon by coupling the levels of marine and fresh-water reservoirs through long-term wet and arid climate modes. The arido-eustasy model produces a standard anti-covariation pattern of marine organic and carbonate carbon-isotope records, which may appear throughout the geochemical record of the last 200 Myr. Under the model, orbitally forced periods of extremely wet climate result in environmental crisis, sea level falls, and carbon cycle perturbations, during which negative excursions in the marine organic carbon-isotope record of sediments containing matter from terrestrial vegetation should be understood as a proxy reporting periods of high precipitation rather than changes in the global carbon reservoir. I propose that the early Toarcian oceanic anoxic event is an example of arido-eustasy.

中文翻译：

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Arido-eustasy：非冰川海平面变化的新例子

摘要 海平面波动在地层记录中很常见，部分原因是周期性的极地冰川作用。在地球历史的温暖时期，在没有极地冰川作用的情况下，人们对这种波动知之甚少，目前正在讨论中。在这里，我重新考虑从碳同位素记录的变化中提取的古环境信息，并通过长期潮湿和干旱气候模式耦合海洋和淡水水库的水平来解释这一现象。arido-eustasy 模型产生了海洋有机和碳酸盐碳同位素记录的标准反共变模式，这可能出现在过去 200 Myr 的整个地球化学记录中。在该模型下，轨道强迫的极端潮湿气候会导致环境危机、海平面下降、和碳循环扰动，在此期间，含有陆地植被物质的沉积物的海洋有机碳同位素记录的负偏移应被理解为高降水量的替代报告期，而不是全球碳库的变化。我认为早期托阿尔西亚海洋缺氧事件是 aido-eustasy 的一个例子。