This is what happened when I warmed up the car and opened the window.

8 AM Feb 2, 2011 New York City    -  -  Click on photo to enlarge -

We (the UK) have had a lot of snow and sub-zero temperatures recently, followed by brief thaws and then sub-zero temperatures, and the water in the pond has frozen white and then these large dendrite-like structures have appeared - the pond is still frozen solid. There are also what looks like bubbles frozen into the ice below the surface and odd dents in the surface..

An age old debate between my grandfather and my mother.

He insists on hot days to close the house up and pull all the blinds down.

My mother however opens all the blinds and every window to let air through.

Who is right? I know there are many factors but surely one must be generally cooler than the other.

If it helps we live in a humid Queensland climate, would it make any difference if it was a dry hot environment?

If you had stood outside looking up with your mouth open in the UK's worst snowstorm in the past 10 years, how long would it taken for the snow to fill your mouth with 200ml of water?

Would it have been more energy efficient to keep yourself warm all that time or to transport that 200ml of water to a tap in the area that the snowstorm happened?

During the current cold weather I notice that the ice on the windscreen of my car can have different properties from morning to morning when approached with my ice scraper. Sometimes it is powdery and easily removable, sometimes only a certain angle of attack with a scraper will do, and other days the ice has properties closer to that of iron!

Why is this and is there anyway of knowing just what the tired worker will be faced with on his/her windscreen in the morning in advance?

The top is no more than 5 meters higher than the bottom. How is this small difference in height able to make such a remarkable difference in the amount of frost formed?! I have noticed this phenomenon for a couple of days now and am desperate to explain it!

The picture attached shows what I am describing.

Weather across the UK and Western Europe appear to be strongly affected by the position of the jet stream and its involvement in moving storms across the Atlantic.

From what i've read the temperature contrasts between the subtropical and polar air mass along with the corriolis force create a strong wind high up in the atmosphere.  What I want to know is why the jet stream migrates northwards and southwards with the seasons and meanders around a bit?

 I can understand why the jet stream might be slower during the summer as the temperature contrasts between the air massess are lower, but i still dont understand the physics of why it moves.

How do people think the jet stream will respond to climate change?

why does it rain?????

What is the reason having 72 % (I guess) Nitorgen in our environment ? What incident turned having it on perfect balance in ecosystem ?