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  2. Season - Wikipedia

    en.wikipedia.org/wiki/Season

    On Earth, seasons are the result of the axial parallelism of Earth's tilted orbit around the Sun. [2] [3] [4] In temperate and polar regions, the seasons are marked by changes in the intensity of sunlight that reaches the Earth's surface, variations of which may cause animals to undergo hibernation or to migrate, and plants to be dormant ...

  3. Subtropics - Wikipedia

    en.wikipedia.org/wiki/Subtropics

    Most subtropical climates fall into two basic types: humid subtropical (Köppen climate classification: Cfa/Cwa), where rainfall is often concentrated in the warmest months, for example Southeast China and the Southeastern United States, and dry summer or Mediterranean climate (Köppen climate classification: Csa/Csb), where seasonal rainfall ...

  4. Convergence zone - Wikipedia

    en.wikipedia.org/wiki/Convergence_zone

    An example of a convergence zone is the Intertropical Convergence Zone (ITCZ), a low pressure area which girdles the Earth at the Equator. [3] Another example is the South Pacific convergence zone that extends from the western Pacific Ocean toward French Polynesia.

  5. Seasons on planets - Wikipedia

    en.wikipedia.org/wiki/Seasons_on_planets

    Given the different Sun incidence in different positions in the orbit, it is necessary to define a standard point of the orbit of the planet, to define the planet position in the orbit at each moment of the year w.r.t such point; this point is called with several names: vernal equinox, spring equinox, March equinox, all equivalent, and named considering northern hemisphere seasons.

  6. Horse latitudes - Wikipedia

    en.wikipedia.org/wiki/Horse_latitudes

    The subtropical ridge starts migrating poleward in late spring reaching its zenith in early autumn before retreating equatorward during the late fall, winter, and early spring. The equatorward migration of the subtropical ridge during the cold season is due to increasing north-south temperature differences between the poles and tropics. [ 9 ]

  7. Atmospheric circulation - Wikipedia

    en.wikipedia.org/wiki/Atmospheric_circulation

    Idealised depiction (at equinox) of large-scale atmospheric circulation on Earth Long-term mean precipitation by month. Atmospheric circulation is the large-scale movement of air and together with ocean circulation is the means by which thermal energy is redistributed on the surface of the Earth.

  8. Allochronic speciation - Wikipedia

    en.wikipedia.org/wiki/Allochronic_speciation

    The Asynchrony of Seasons Hypothesis is proposed to be a contributing factor to higher speciation rates as it relates directly to that of allochronic speciation. [100] The hypothesis proposes that the pattern is a result of a lack of synchrony with seasonal variations in tropical regions.

  9. Hadley cell - Wikipedia

    en.wikipedia.org/wiki/Hadley_cell

    Shifts in the ITCZ associated with the seasonal variability of the Hadley circulation cause monsoons. The sinking branches of the Hadley cells give rise to the oceanic subtropical ridges and suppress rainfall; many of the Earth's deserts and arid regions are located in the subtropics coincident with the position of the sinking branches.