Geography Glossary - I
insolation
The sun's energy received by the earth
International Date Line
An imaginary line near 180¡ã longitude that exists to separate the two simultaneous days that exist on the planet that the same time
isoline
A line connecting points of equal value. See the list of over two dozen different types of isolines
ITCZ (Intertropical Convergence Zone)
The zone of low pressure near the equator where the trade winds converge and create heavy convectional precipitation; also known as the Inter tropical Front (ITF)