Isotherm

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The 10°C mean isotherm in July, marked by the red line, is commonly used to define the Arctic region border

An isotherm is a line of equal or constant temperature on a graph, plot, or map; an isopleth of temperature. For example, isotherms are commonly seen on weather maps to show large-scale temperature distributions.

See also

• isothermal process

External links

• [National Science Digital Library - Isotherm]
• [Drawing Contour Plots]. A lesson plan that deals with drawing various isopleths including isotherms.
• [National Science Digital Library - Isopleth Animations]. An animated example that contains Isotherms.

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