Re: Cloudworld

John Park (af250@xxxxxxxxxxxxxxxxxxx) writes:
[...]
(But are there solid CO2 clouds on Venus? I suspect the
temperature/pressure combinations for CO2 clouds may be a bit tricky to
satisfy, though I'd have to look into it.)

It seems that Venus' atmosphere never gets cold enough to form CO2
clouds. But then neither does Earth's. Carbon dioxide sublimes at -78.5 C
at one atmosphere. Our troposhere gets down to about minus fifty, the
stratosphere to a bit above minus sixty, and then it gets warmer with
increasing altitude.

Somewhere around 80 km altitude the temperature bottoms out again, this
time near -80 C, but then the pressure is only about 10^-5 atm.


--John Park
.