seasonal variation


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seasonal variation

[′sēz·ən·əl ‚ver·ē′ā·shən]
(geophysics)
The variation of any parameter of the upper atmosphere with season; for example, the variation of ion densities of different parts of the ionosphere, and the resulting variation in transmission of radio signals over large distances.
References in periodicals archive ?
5) display the seasonal variation in electron density at different heights for each year:
In table 2 it was observed that the data of patients, ischemic and hemorrhage stroke related to seasonal variation was significant.
It is the only poisoning in which typical seasonal variations are present, as the incidences are typically higher in monsoon season.
Seasonal variation in coronary heart disease in Scotland.
The findings suggest that staffing may have an impact on seasonal variations in mortality and length of stay.
Seasonal variation in semen quality of Boer and Angora goat rams using different collection techniques.
avium disease in children has previously shown no seasonal variation (9), or it has been dominant in winter, spring, or both (1,2).
There was no significant difference in annual variation in mean litter weight over three years, but seasonal variation was highly significant with spring having the highest litter weight (Table 6).
In the student-travel industry, there is a significant seasonal variation in my staffing needs, which poses real business challenges for me with eight offices worldwide.

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