ABC of Weather: Katabatic Winds
I need you to use your imaginations today and substitute the Antarctic Ice Sheet in the above diagram (courtesy of Hannes Grobe and available for use under Creative Commons Licence via Wikimedia ) for the 1 in 10 slope in my garden and the ocean/sea ice to the left for the bottom of the slope complete with fence and hedge. If you do that, you now have the classic conditions for katabatic winds forming in a garden setting, more commonly known as a frost pocket or frost hollow . As you can see from the diagram, katabatic winds are formed when cold air meets warmer air and the resultant difference in pressure between the two, aided by the downward pressure of gravity forces the cold air down the slope. As well as the Antarctic and my garden, these winds are commonly found in mountain areas and many other places where these kind of conditions occur. Whilst you're probably not familiar with the name katabatic (from the Greek kata , meaning down) you might know some of the special...