circadian rhythm

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Related to diurnal cycle: diurnal rhythm, Circadian cycle

circadian rhythm:

see rhythm, biologicalrhythm, biological,
or biorhythm,
cyclic pattern of physiological changes or changes in activity in living organisms, most often synchronized with daily, monthly, or annual cyclical changes in the environment.
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circadian rhythm

[sər′kād·ē·ən ′rith·əm]
(physiology)
A self-sustained cycle of physiological changes that occurs over an approximately 24-hour cycle, generally synchronized to light-dark cycles in an organism's environment.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
2007) show that cumulus parameterization schemes tend to reduce the representation of precipitation's diurnal cycle. In the future, a scale-aware convective scheme will be considered to address this issue.
The long-term observational wind direction data in coastal meteorological stations can be used to estimate the climatic wind direction distribution and its diurnal cycle. Figure 2 shows the equivalent of a traditional wind rose with another axis added representing the time of the day.
But even that, all physical-statistical approaches exhibit a significant improvement in wind forecast and present the similar error in the diurnal cycle. The WRF/YSU/Noah outputs have the largest error in RMSE, and the nowcasting have the lowest.
In order to characterize moisture absorption in southern Florida, this investigation observed multiple samples of three different coating systems on exposure throughout a diurnal cycle in southern Florida.
Researchers at the SMART Institute found that the PV canopies were more effective in reducing surface temperatures of pavement throughout the diurnal cycle and reduced the required parking lot size since planter space for the trees was not required.
To reflect the diurnal changes in temperature, thermal units are calculated on an hourly basis by subtracting [T.sub.b] from the temperature (T) for each hour of the diurnal cycle, the temperature values are summed, and the summation is divided by 24 so that HTU ([degrees]C h) are expressed on a daily basis ([degrees]C d, Grimm et al., 1993; Cesaraccio et al., 2001), as shown in Eq.
In particular, the daily light-dark cycle (also called the diurnal cycle) has shaped the activity patterns of most animals over millions of years of evolution.
Although our sample size was small, the three fish of our study, and the two other yellow fin tuna that exhibited such association (Cayre et al., 1996; Brill et al., 1999), exhibited different lengths of associations, at different periods of the diurnal cycle, all of which also correspond to the variety of patterns observed for fish associated with anchored FADs.
At the 2017 Wyoming site totality was observed to impact the BL height dramatically, though not as substantially as the alteration in height due to the transition from day to night (diurnal cycle) which we also measured for comparison of magnitude of the eclipse change.