Originally Posted by
cyccommute
I have named a source of liquid water. See post 161. Depending on the starting and ending temperature, the amount of water that air can carry varies widely and in a nonlinear fashion. Air at the freezing point can hold 4 g/cubic meter. Air at 0°F can hold 1g/ cubic meter. The water has to go somewhere.
You can see where I live. We are no strangers to winter weather. I've seen real-life demonstration of winter for many years. You can't show me a "real life" demonstration of car exhaust freezing on a road way at an intersection because it can not happen. Something else is happening but the car exhaust isn't causing it.
The conversation with you is indeed pointless because it is devolving into insults made only by you. If you don't agree with my calculations, do you own. Show me where I am wrong. Otherwise, at this point, you are doing what you accused me of...being a troll.
Insults, not really, just talking with somebody that doesn't want believe the facts and testimony of multiple posters. Calculations are fine in the classroom, but real-world life experience is what I'm talking about.
I know Denver has winter, however, the Twin Cities are unique in the US (last winter):
...
temperatures during the winter months are colder in the Twin Cities than in any other major metropolitan area in the continental United States, and are about equal to those in Anchorage, Alaska, which is around 1,000 miles closer to the North Pole.
Climate of the Twin Cities - Wikipedia, the free encyclopedia
Therefore, we have more experience with sub-zero temps that most places in the US. With temps staying below 0F for days-on-end, there is very little moisture in the air (the air is drier than a dessert). There is far less moisture in the air than what is coming from the tailpipe of hundreds of cars. It would be very odd that the tiny amount of moisture left in the air would only form ice at places where cars are stopped, idling. Wouldn't that ice would form on sidewalks and trees and other surfaces? But it does not, it only forms on roadways where cars are stopped idling. The source of the moisture that is forming ice on the road surface is the cars exhaust. There are dozens of source that state the exact same thing I'm saying. It's OK to say you don't have a calculation to explain this, we won't judge you, just stop saying we are wrong - that is insulting.