climate

406

Many of the bluffs here have layers of sandstone that tilt up and down at different angles. What caused that?

Melting Icebergs

This week's experiment comes from a report I recently heard on National Public Radio. Unfortunately, I was driving and could not write down the fellow's name, so I could give him proper credit. He was talking about the facts and fictions of global warming. One point that he mentioned was one that I had heard many times and had never thought all the way through. What would happen if the global temperature rose enough for the polar ice caps to melt? All of that extra water would cause worldwide flooding, right? Lets investigate. You will need:

924

Trees with yellow leaves
Although we have had several freezes, the leaves here are just starting to change. Every year, the leaves start changing colors in the North first, and then the color change spreads South. This is not due to the temperature. What causes it?

925

Sandstone cliff
As winter approaches here in Johnson Canyon, I will be paying close attention to katabatic winds. Without looking it up, what are katabatic winds, and why would they be important to us in the canyon?

928

Snow on trees
We have already had our first snow of the year. The day it snowed, the low was only 36°F. If the temperature is above freezing, why did the precipitation not fall as rain?

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