Diurnal variation in body temperature, ranging from about 37.5 °C (99.5 °F) from 10 a.m. to 6 p.m., and falling to about 36.4 °C ... The normal daily temperature variation is typically 0.5 °C (0.90 °F), but can be greater among people recovering from a fever.

Temperature lag. Temperature lag is an important factor in diurnal temperature variation: peak daily temperature generally occurs after noon, as air keeps net absorbing heat even after noon, and similarly minimum daily temperature generally occurs substantially after midnight, indeed occurring during early morning in the hour around dawn, since heat is lost all night long.

Diurnality is a form of plant and animal behavior characterized by activity during daytime, with a period of sleeping or other inactivity at night.The common adjective used for daytime activity is "diurnal".The timing of activity by an animal depends on a variety of environmental factors such as the temperature, the ability to gather food by sight, the risk of predation, and the time of year.

General. Diurnal cycle, any pattern that recurs daily . Diurnality, the behavior of animals and plants that are active in the daytime; Diurnal phase shift, a phase shift of electromagnetic signals; Diurnal temperature variation, a cycle of daily temperature change; Astronomy. Diurnal arc, the time (expressed in right ascension) that it takes a planet etc. to move from its rising to its …

A chronotype is the behavioral manifestation of underlying circadian rhythm's myriad of physical processes. A person's chronotype is the propensity for the individual to sleep at a particular time during a 24-hour period. Eveningness (delayed sleep period; most active and alert in the evening) and morningness (advanced sleep period; most active and alert in the morning) are the two …

The variation in temperature that occurs from the highs of the day to the cool of nights is called diurnal temperature variation. Temperature ranges can also be based on periods of a month, or a year. ... Temperature variation along the year in Aracaju is very damped (standard deviation of 1.93 for the maximum temperature and 2.72 for the ...

The Earth's orbit varies between nearly circular and mildly elliptical (its eccentricity varies). When the orbit is more elongated, there is more variation in the distance between the Earth and the Sun, and in the amount of solar radiation, at different times in the year.In addition, the rotational tilt of the Earth (its obliquity) changes slightly.A greater tilt makes the seasons more extreme.

A circadian rhythm (/ s ər ˈ k eɪ d i ə n /), or circadian cycle, is a natural, internal process that regulates the sleep–wake cycle and repeats roughly every 24 hours. It can refer to any process that originates within an organism (i.e., endogenous) and responds to the environment (entrained by the environment). These 24-hour rhythms are driven by a circadian clock, and they have …

Mars' temperature and circulation vary every Martian year (as expected for any planet with an atmosphere and axial tilt).Mars lacks oceans, a source of much interannual variation on Earth. [clarification needed] Mars Orbiter Camera data beginning in March 1999 and covering 2.5 Martian years show that Martian weather tends to be more repeatable and hence more …

Sea surface temperature (SST), or ocean surface temperature, is the ocean temperature close to the surface. The exact meaning of surface varies according to the measurement method used, but it is between 1 millimetre (0.04 in) and 20 metres (70 ft) below the sea surface. Air masses in the Earth's atmosphere are highly modified by sea surface temperatures within a …