Hyperthermals are transient global warming events that share many similarities to the future climate change. These hyperthermal events are often associated with major perturbations in the biogeochemical cycles of carbon, nitrogen, phosphorus and many other elements. Understanding the mechanism(s) that drives the initiation and termination requires an integrative inter-disciplinary approach. This session aims to bring together researchers that study hyperthermal events from both marine and terrestrial substrates to improve our understanding of how Earth’s climate responds to extreme forcings. We encourage contributions in investigating the cause(s) and consequence(s) of the hyperthermals, geochronology, terrestrial-marine comparisons, paleoclimate reconstructions using various proxies, and carbon cycle modeling.