Land surface area, weathering and habitability

Indication of insensitivity of planetary weathering behavior and habitable zone to surface land fraction

Finds the weathering rate is similar for planets with land surface areas down to ~1%. The climate on waterworlds may be unstable because of the lack of negative feedback from the silicate carbonate cycle, but they could potentially halt a moist greenhouse effect once enough water is removed to expose the continents (waterworld self-arrest).