Title:
A view of the possible habitability of ancient Venus and similar exoplanetary worlds

Abstract:
The canonical view of Venus' climate history describes a world that has spent most of its history with surface liquid water, plate tectonics, and a stable temperate climate akin to that of modern Earth. Part of the rationale for this optimistic scenario is due to the high deuterium to hydrogen ratio measured by Pioneer Venus that may imply that Venus had a shallow ocean's worth of water until its global resurfacing event drove it into a runaway greenhouse state (see Figure). However, a dearth of observational data due to a lack of space missions to Venus has made this claim extremely hard to discount or confirm. Via a series of 3-D GCM simulations we demonstrate the viability of the canonical model using the data available to us today. We will also attempt to justify some of the assumptions given for the canonical model's viewpoint and in our 3-D simulations.

Host:
Yuka Fujii