• Using the Late Paleozoic Ice Age as an Analog for Present Day Climate

  • Mar 8 2025
  • Length: 30 mins
  • Podcast

Using the Late Paleozoic Ice Age as an Analog for Present Day Climate

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  • Summary

  • The late Paleozoic ice age began in the Late Devonian and ended in the Late Permian, occurring from 360 to 255 million years ago. It was similar to the present day in two key respects: rising atmospheric CO2 and recurrent major ice sheets. In the podcast, Isabel Montañez explains how we can use proxies to learn about the climate and ocean conditions that prevailed then. And with the help of a model, she says that we can also learn about sensitivities and feedbacks of Earth systems to rising CO2. Among other things, the model suggests that when the atmosphere reaches the present day level of CO2, significant parts of the ocean may become anoxic and ocean circulation patterns alter.

    Montañez is a Distinguished Professor in the Department of Earth and Planetary Sciences at the University of California, Davis.
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