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Radar image of Venus created by the Solar System Visualization project and the Magellan science team at the JPL Multimission Image Processing Laboratory. Credit: NASA/JPL.
“The Venusian atmosphere requires volcanic outgassing in an early phase of plate-tectonic-like activity,”“Our findings indicate that Venus’s atmosphere results from a great climatic–tectonic transition, from an early phase of active lid tectonics that lasted for at least 1?Gyr , followed by the current stagnant lid-like mode of reduced outgassing rates.”
The researchers modeled what would have had to happen on the planet to get to where it is today. They eventually were able to match the numbers almost exactly when they accounted for limited tectonic movement early in Venus’ history followed by the stagnant lid model that exists today. Comparatively, the movement of the plates in Earth’s crust increased over billions of years, forming new continents and mountains, and leading to chemical reactions that stabilized the planet’s surface temperature, resulting in an environment more conducive to the development of life.
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