[sit-rep]

how is it there can be water ice clouds with no evidence of water evaporation points? whered the vapor come from?

[Paul R.]

Sublimation off the ice caps, for one. Excellent article, here:

https://marsed.asu.edu/mep/water#:~:text=Like%20Earth,%20Mars%20today%20has,lies%20underground%20in%20the%20subsurface.