[battlecry]

I wonder why they are not thinking it could be dry ice. With so much CO2 in the atmosphere.

[LibWhacker]

Good question. I don’t know. Is dry ice stable at minus 60 and very low atmospheric pressures?

[o_zarkman44]

“I wonder why they are not thinking it could be dry ice. With so much CO2 in the atmosphere.”

Your question just raised a question for me. If CO2 is present in large quantities in Earths Atmosphere, and the atmosphere is cold at the Earths Polar Regions, would we have dry ice formations on Earth instead of global warming?

[Greysard]

I wonder why they are not thinking it could be dry ice

If posters on Slashdot are correct, it's too hot for dry ice to remain. Only a thin frost-like film can form, and only during coldest nights. In any case I'm sure NASA folks can tell a difference between water ice and dry ice (and if not, we are in trouble.)

[DB]

I wonder that too. Frozen CO2 is white and evaporates readily.