Hot or cold: how Earth’s greatest volcanic phenomena impacted the carbon cycle and climate

Lawrence Percival, enseignant-chercheur à l’université libre d’Amsterdam, présentera ses travaux sur l’impact du volcanisme sur le cycle du carbone et le climat au cours des temps géologiques.

Jeudi 23 octobre 2025 à 13 heures, salle 303

Volcanic activity has had a major influence on Earth’s carbon cycle and overall climate since the planet’s earliest history, over both geologically long and short timescales. In the last 500 million years of the Phanerozoic, numerous (geologically) abrupt events occurred during which the global carbon cycle and climate were perturbed. Many of these intervals coincided with huge volcanic episodes during the formation of Large Igneous Provinces, some of which led to mass extinctions of animal life, and a few events have been linked with both. In recent decades, the impact of modern anthropogenic CO₂ emissions on the global climate and environment has led to increased interest into these times from Earth’s history that featured similar (to some extent) environmental changes. Studying past climate changes related to Large Igneous Provinces in this context relies on understanding the causal links between volcanism and the carbon cycle, however. In this talk I present some of my past and ongoing work on how these huge volcanic events impacted Earth’s carbon cycle in different ways, focussing on the rising application of sedimentary geochemical tools such as mercury concentrations and osmium isotopes over recent years.

extrait:

lien_externe:

titre:

Hot or cold: how Earth's greatest volcanic phenomena impacted the carbon cycle and climate

intervenant:

Lawrence Percival

date:

jeudi 23 octobre 2025

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Hot or cold: how Earth's greatest volcanic phenomena impacted the carbon cycle and climate

Lawrence Percival, enseignant-chercheur à l’université libre d’Amsterdam, présentera ses travaux sur l’impact du volcanisme sur le cycle du carbone et le climat au cours des temps géologiques.

Jeudi 23 octobre 2025 à 13 heures, salle 303

 

Volcanic activity has had a major influence on Earth’s carbon cycle and overall climate since the planet’s earliest history, over both geologically long and short timescales. In the last 500 million years of the Phanerozoic, numerous (geologically) abrupt events occurred during which the global carbon cycle and climate were perturbed. Many of these intervals coincided with huge volcanic episodes during the formation of Large Igneous Provinces, some of which led to mass extinctions of animal life, and a few events have been linked with both. In recent decades, the impact of modern anthropogenic CO₂ emissions on the global climate and environment has led to increased interest into these times from Earth’s history that featured similar (to some extent) environmental changes. Studying past climate changes related to Large Igneous Provinces in this context relies on understanding the causal links between volcanism and the carbon cycle, however. In this talk I present some of my past and ongoing work on how these huge volcanic events impacted Earth’s carbon cycle in different ways, focussing on the rising application of sedimentary geochemical tools such as mercury concentrations and osmium isotopes over recent years.