View Full Version : Ocean-Land % on other planets

2013-Feb-05, 08:10 PM
The Earth is 70% ocean and 30% land.

How critical is this ratio for life on another Earth-like planet in hydrology, weather, wind and temperature? ie can life beyond viruses and bacteria akin to what we know it evolve/appear/be sustained on a planet 50/50 or 80/20?

And 10% water, 90% land?

2013-Feb-06, 01:26 AM
There are likely many other factors besides the ocean-land ratio. with some other things optimised, some kinds of simple land life can likely thrive from 99% ocean to 1% ocean. Very advanced humans can likely thrive almost anywhere.
With 1% ocean and rare surface water, such as lakes, swamps, rivers, streams and puddles, there will be rare or zero rainfall that reaches the surface. Dew, snow and frost will also be rare. Neil

2013-Feb-06, 12:35 PM
Most of our oxygen comes from water borne life. On low ocean world that still have oxygenated atmospheres, I wonder what the equivalent would be.