Explore groundbreaking research challenging established theories on Earth's atmospheric oxygenation in this 37-minute AGU Fall Meeting 2019 press conference. Delve into new findings that question the sources of Earth's 'oxygenation events' from two billion years ago, and examine their implications for understanding oxygen history on Earth and other planets. Learn from experts Joshua Krissansen-Totton, Benjamin Mills, and Noah Planavsky as they discuss nutrient mechanisms, modeling approaches, and the role of escaping hydrogen and mantle chemistry in oxygen production. Gain insights into the gradual increase of oxygen sources, the importance of phosphorus, and engage with questions from reporters and educators on this pivotal topic in Earth's history.
Overview
Syllabus
Introduction
Welcome
The rise of atmospheric oxygen
The emerging view
Nutrients
mechanistic model
questions
events
how has the Earth become oxygenated
simple model
model
primary interest
natural human tendency
previous modeling work
what makes this study unique
escaping hydrogen to space
chemistry of the mantle
gradual increase in oxygen sources
phosphorus
questions from reporters
high school biology teacher
reporters questions
Taught by
AGU
