An Oxidation Gradient Straddling the Small Planet Radius Valley
We present a population-level view of volatile gas species (H _2 , He, H _2 O, O _2 , CO, CO _2 , CH _4 ) distribution during the sub-Neptune to rocky planet transition, revealing in detail the dynamic depileve easy clean nature of small planet atmospheric compositions.Our novel model couples the atmospheric escape model IsoFATE with the magma ocea