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Chapter 15: Problem 7

Meteorologists in the United States usually report barometer readings in inches. What are they talking about?

Short Answer

Expert verified
Meteorologists in the United States are talking about atmospheric pressure when they report barometer readings in inches. Specifically, they are referring to the pressure required to support 30 inches of mercury in a mercury barometer at 0 degrees Celsius.

Step by step solution

01

Understanding the Concept of Barometer

A barometer is a scientific instrument used in meteorology to measure atmospheric pressure. Pressure tendency can forecast short term changes in the weather.
02

Elucidating 'inches' in Barometer Readings

When meteorologists in the United States say they are reporting barometer readings in inches, they refer to 'inches of mercury': a unit of measurement for pressure. It's the pressure required to support 760 millimeters (30 inches) of mercury in a mercury barometer at 0 degrees Celsius.
03

Further Explanation

It's important to note that different countries might use different units to measure and report atmospheric pressure, including millibars or pascals. However, in the US, the common practice is to use inches of mercury.

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