seasonal variation


Also found in: Dictionary, Thesaurus, Medical, Financial.

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 ?
Caldwell & Peters (2009) have investigated seasonal variations in fitness among semi-professional football players and found significant decline in the level of fitness from the end of the season to the beginning of the new one.
Statistical analysis of the study was done using Table-I to determine seasonal variation of acute appendicitis.
Seasonal variation in suicides and in admissions to hospital for mania and depression.
chevrieri to overcome the physiological challenges of an change to cold environment in winter successfully with the seasonal variations. Cold can induce an increase in mitochondrial protein contents and COX activity both in liver and brown adipose tissue, suggesting that A.
Rosenbauer et al., "Seasonal variation in month of diagnosis in children with type 1 diabetes registered in 23 European centers during 1989-2008: little short-term influence of sunshine hours or average temperature," Pediatric Diabetes, vol.
* The first part represents a study of the seasonal variation of the electron density over Baghdad city for each year at different heights (100 km - 1000 km) and for a specific time of the day (noon time) on the 15th of the months:
Our study showed association of seasonal variation in occurrence of imminent eclampsia and eclampsia.
Key words: Stroke, Ischemic Stroke, hemorrhagic Stroke, Stroke risk factors, Seasonal variation.
Study of seasonal variation in snake bite in patients admitted to a Mangalore based tertiary care hospital.
While seasonal variation has been widely reported for many respiratory infections in different parts of the world, it is much less documented for TB.
The model also showed that seasonal aerosol and cloud variations drove the seasonal variation in global electrical resistance.

Full browser ?