The number of burrows used by desert tortoises varies spatially and temporally, from approximately 5 to 25 per year.

The environment of deposition for these sediments has changed, varying spatially and temporally.

Isarithmic mapping requires 3-D thinking for surfaces that vary spatially.

According to Maxwell's equations, a spatially varying electric field is always associated with a magnetic field that changes over time.

Likewise, a spatially varying magnetic field is associated with specific changes over time in the electric field.

These spatially varying optical parameters do not correspond to any natural material, but may be implemented using metamaterials.

The new feature will be a spatially varying space-charge density.

Central in the analysis of frictional contact problems is the understanding that the stresses at the surface of each body are spatially varying.

Some common mirages are caused by a spatially varying refractive index of air.

This causes a spatially varying refractive index grating to occur throughout the crystal.