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  2. Earth rainfall climatology - Wikipedia

    en.wikipedia.org/wiki/Earth_rainfall_climatology

    The equatorial region near the Intertropical Convergence Zone (ITCZ), or monsoon trough, is the wettest part of the world's continents. Annually, the rain belt within the tropics marches northward by August, then moves back southwards into the Southern Hemisphere by February and March.

  3. Sporadic E propagation - Wikipedia

    en.wikipedia.org/wiki/Sporadic_E_propagation

    The maximum usable frequency (MUF) also varies widely, but most commonly falls in the 25–150 MHz range, which includes the band II FM broadcast band (87.5–108 MHz), band I VHF television (American TV channels A2–A6, Russian channels R1–R5, and European channels E2–E4, which are no longer used in Western Europe), CB radio (27 MHz), and ...

  4. Tropics - Wikipedia

    en.wikipedia.org/wiki/Tropics

    Many tropical areas have both a dry and a wet season. The wet season, rainy season or green season is the time of year, ranging from one or more months when most of the average annual rainfall in a region falls. [9] Areas with wet seasons are disseminated across portions of the tropics and subtropics, some even in temperate regions. [10]

  5. Climate classification - Wikipedia

    en.wikipedia.org/wiki/Climate_classification

    A polar ice cap, or polar ice sheet, is a high-latitude region of a planet or moon that is covered in ice. Ice caps form because high-latitude regions receive less energy as solar radiation from the sun than equatorial regions, resulting in lower surface temperatures. [24] A desert is a landscape form or region that receives very little ...

  6. Equatorial Africa - Wikipedia

    en.wikipedia.org/wiki/Equatorial_Africa

    Global map showing location of the Equator. Equatorial Africa is an ambiguous term that sometimes is used to refer either to the equatorial region of sub-Saharan Africa traversed by the Equator, [1] more broadly to tropical Africa or in a biological and geo-environmental sense to the intra-tropical African rainforest region.

  7. Equatorial wave - Wikipedia

    en.wikipedia.org/wiki/Equatorial_wave

    At shortest periods are the equatorial gravity waves while the longest periods are associated with the equatorial Rossby waves. In addition to these two extreme subclasses, there are two special subclasses of equatorial waves known as the mixed Rossby-gravity wave (also known as the Yanai wave) and the equatorial Kelvin wave. The latter two ...