"temporal variation" is correct and usable in written English.
It refers to variations in something happening over time. For example, you could say "We studied the temporal variation of precipitation in the region."
Patterns of Temporal Variation in Online Media.
Third we examine the temporal variation in events.
Temporal variation of the events is studied.
Lin, W. & Pan, Y. Temporal variation of magnetotactic bacterial communities in two freshwater sediment microcosms.
Li, L. et al. Strong temporal variation over one Saturnian year: from Voyager to Cassini.
The resultant temporal variation of the simulated light intensity was then post-processed for sectioning.
We found that FR patterns in PMd demonstrated substantial temporal variation during the decision-formation process.
Although prehistoric farming communities exhibited regional and temporal variation, they shared certain similarities.
Bell, M. A. & Haglund, T. R. Fine-scale temporal variation of the Miocene stickleback Gasterosteus doryssus.
By involving the fishers, many more samples can be taken, giving more insight in spatial and temporal variation.
Point mutation rates may reflect temporal variation in repair mechanisms.
