The phrase "areal variations" is correct and usable in written English.
It can be used in contexts discussing differences or changes in characteristics across different geographic areas.
Example: "The study focused on areal variations in climate patterns across the region."
Alternatives: "spatial variations" or "geographic variations".
Finally, we have extended the algorithm to compute the planar and quadratic surfaces along which the rate of areal variation in the visible portion of the light source changes discontinuously due to occlusion.
With an annual areal variation about six times as great as that for the Arctic ice pack, the Antarctic pack doubtless plays a far greater role in varying heat exchange between ocean and atmosphere and thus probably in altering global weather patterns.
Variations in photosynthetic efficiencies were the result of the variations in areal productivities that were discussed before.
The variations in areal productivities within the different photobioreactors are a result of variations in biomass concentrations.
Variations in areal productivity were larger for all photon flux densities and dilution rates in the flat panel photobioreactor and the open raceway pond than in the tubular systems.
There were no significant differences in the areal modulus and curvature variation between APCS and NPC.
There were no significant differences in the areal modulus and curvature variation between Gc-APCS and nature porcine cornea.
Variation in areal dose-rate was accomplished by changing the second and third condenser lenses to spread out or contract the electron beam on the sample at a constant total dose-rate.
The culture is not mixed well over all panels, while in the other systems the entire culture volume is mixed resulting in less variation in areal productivity.
