Hot Clouds on Mars?

This article discusses how the clouds that cover Mars surface at night are five times thicker and hover close to the ground. The thinking behind this is that it keeps the surface of the planet from freezing at night. The discovery of these clouds was made when researchers using the Mars Global Surveyor noticed a temperature anomaly at night and were trying to figure out an explanation for it. Then using a laser altimeter they found out that the surface of Mars they were recording was higher than the surface they recorded during the day leading to the discovery of these clouds. I think this is interesting because if there is a possibility that certain locations avoid freezing temperatures then the possibility of microbial life existing is much more plausible.