height-change line

Aline of equal change in height of a constant-pressure surface over a specified previous interval of time; the lines drawn on a height-change chart. Also known as contour-change line; isallohypse.

Related terms:

• height-change chart
• pressure-change chart
• contour-change line
• height pattern
• change chart
• constant-height chart
• scale height
• Contour Line
• isotimic line
• isoceraunic line