# Spatial gradient

A **spatial gradient** is a gradient whose components are spatial derivatives, i.e., rate of change of a given scalar physical quantity with respect to the position coordinates.
Homogeneous regions have spatial gradient vector norm equal to zero.
When evaluated over altitude or depth, it is called **vertical gradient**.

Examples:

- Biology

- Concentration gradient, the ratio of solute concentration between two adjoining regions
- Potential gradient, the difference in electric charge between two adjoining regions

- Fluid dynamics and earth science

## See also

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