Earth:Diurnal cycle
A diurnal cycle (or diel cycle) is any pattern that recurs every 24 hours as a result of one full rotation of the planet Earth around its axis.[1] Earth's rotation causes surface temperature fluctuations throughout the day and night, as well as weather changes throughout the year. The diurnal cycle depends mainly on incoming solar radiation.[2]
Climate and atmosphere
In climatology, the diurnal cycle is one of the most basic forms of climate patterns, including variations in diurnal temperature and rainfall.[1] Diurnal cycles may be approximately sinusoidal or include components of a truncated sinusoid (due to the Sun's rising and setting) and thermal relaxation (Newton cooling) at night.[1] The diurnal cycle also has a great impact on carbon dioxide levels in the atmosphere, due to processes such as photosynthesis and cellular respiration.[3]
Biological effects
Diurnal cycles of light and temperature can result in similar cycles in biological processes, such as photosynthesis in plants[3] and clinical depression in humans.[4] Plant responses to environmental cycles may even induce indirect cycles in rhizosphere microbial activities, including nitrogen fixation.[5]
Semi-diurnal cycle
A semi-diurnal cycle refers to a pattern that occurs about every twelve hours or about twice a day. Often these can be related to lunar tides, in which case the interval is closer to 12 hours and 25 minutes.
See also
- Chronotype
- Circadian rhythm
- Diel vertical migration
- Diurnality
- Diurnal Climate (de)
References
- ↑ 1.0 1.1 1.2 Betts, A (2015). "Diurnal Cycle" (in en). Diurnal Cycle (2nd ed.). 319–23. doi:10.1016/B978-0-12-382225-3.00135-3. ISBN 9780123822253. https://www.sciencedirect.com/science/article/pii/B9780123822253001353.
- ↑ Hartmann, Dennis L. (1994). "The Energy Balance of the Surface" (in en). International Geophysics 56: 81–114. doi:10.1016/S0074-6142(08)60561-6. ISSN 0074-6142. https://www.sciencedirect.com/science/article/pii/S0074614208605616.
- ↑ 3.0 3.1 Matthews, Jack S.A.; Vialet-Chabrand, Silvere R.M.; Lawson, Tracy (2017). "Diurnal Variation in Gas Exchange: The Balance between Carbon Fixation and Water Loss". Plant Physiology 174 (2): 614–623. doi:10.1104/pp.17.00152. ISSN 0032-0889. PMID 28416704.
- ↑ Wirz-Justice, Anna (2008). "Diurnal variation of depressive symptoms". Dialogues in Clinical Neuroscience 10 (3): 337–343. doi:10.31887/DCNS.2008.10.3/awjustice. ISSN 1294-8322. PMID 18979947.
- ↑ G.K., Sims; Dunigan, E.P. (1984). "Diurnal and seasonal variations in nitrogenase activity (C2H2 reduction) of rice roots" (in en). Soil Biology and Biochemistry 16 (1): 15–18. doi:10.1016/0038-0717(84)90118-4. ISSN 0038-0717. https://www.sciencedirect.com/science/article/abs/pii/0038071784901184.
 |  |
