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I would like some information about isotherms and isobars. I am doing a long term project on them. I am taking temperatures of my back yard for thirty days. Thanks.

Weather forecastors use terms like isotherms and isobars very often. You can break each word down into two parts to help understand them. The prefix "iso" means equal or constant. The root "therm" means temperature, like in thermometer. Put the two words together and you get isotherm, which is a line of constant temperature. It works the same with isobar. "Bar" means weight or pressure, so an isobar is a line of constant pressure.

These two terms, plus many others, are known as "isopleths". Isopleths are very helpful because they show you a lot of information graphically. It is easier to recognize patterns by looking at a picture than by looking at individual numbers.



Submitted by Dan (New York, USA)
(May 22, 1998)



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