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Temperature lag, also known as thermal inertia, is an important factor in diurnal temperature variation. Peak daily temperature generally occurs after noon, as air keeps absorbing net heat for a period of time from morning through noon and some time thereafter. Similarly, minimum daily temperature generally occurs substantially after midnight ...
Diurnal variation of air temperature (blue) lag by 3 to 4 hours behind insolation at solar noon (red). In climatology, the diurnal cycle is one of the most basic forms of climate patterns, including variations in diurnal temperature and rainfall. [1]
Seasonal lag is the phenomenon whereby the date of maximum average air temperature at a geographical location on a planet is delayed until some time after the date of maximum daylight (i.e. the summer solstice). This also applies to the minimum temperature being delayed until some time after the date of minimum insolation.
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. The size of ground-level atmospheric temperature ranges depends on several factors, such as: Average air temperature; Average humidity
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
Diurnal temperature variation – e.g., peak daily temperature typically occurs after noon Seasonal lag – e.g., peak annual temperature typically occurs after the summer solstice Small body examples include:
Figure 1. Tidal temperature and wind perturbations at 100 km altitude for September 2005 as a function of universal time. The animation is based upon observations from the SABER and TIDI instruments on board the TIMED satellite. It shows the superposition of the most important diurnal and semidiurnal tidal components (migrating and nonmigrating).
Martin Hackworth is a Physics Lecturer as Idaho State University. I obtained his prior permission by email to originate two new sections in this article "Temperature Lag" and "Differences in Variation" based on his published course notes. Dgiroux 01:45, 11 January 2009 (UTC)