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  2. African humid period - Wikipedia

    en.wikipedia.org/wiki/African_humid_period

    The modern, arid Sahara. The Sahara was not a desert during the African humid period. Instead, most of northern Africa was covered by grass, trees, and lakes. The African humid period (AHP; also known by other names) was a climate period in Africa during the late Pleistocene and Holocene geologic epochs, when northern Africa was wetter than today.

  3. Ecological pyramid - Wikipedia

    en.wikipedia.org/wiki/Ecological_pyramid

    Pyramids of energy are normally upright, but other pyramids can be inverted (pyramid of biomass for marine region) or take other shapes (spindle shaped pyramid). Ecological pyramids begin with producers on the bottom (such as plants) and proceed through the various trophic levels (such as herbivores that eat plants, then carnivores that eat ...

  4. Nubian Sandstone Aquifer System - Wikipedia

    en.wikipedia.org/wiki/Nubian_Sandstone_Aquifer...

    The transport of pipe segments for the Great Man-Made River (GMMR) in the Sahara desert, Libya, during the 1980s.A network of pipes that supplies water from the Nubian Sandstone Aquifer System, a fossil aquifer in the Sahara desert of Libya, the GMMR is the world's largest irrigation project.

  5. The Sahara Desert—Yes, That One—Remarkably Grows ... - AOL

    www.aol.com/sahara-desert-yes-one-remarkably...

    Climate scientists used models to show historic intervals of a green, vegetated Sahara Desert that occur every 21,000 years. The Sahara Desert—Yes, That One—Remarkably Grows Green Every 21,000 ...

  6. Desert ecology - Wikipedia

    en.wikipedia.org/wiki/Desert_ecology

    Sand dunes in the Sahara Desert. Desert ecology is the study of interactions between both biotic and abiotic components of desert environments. A desert ecosystem is defined by interactions between organisms, the climate in which they live, and any other non-living influences on the habitat. Deserts are arid regions that are generally ...

  7. Sahara desert (ecoregion) - Wikipedia

    en.wikipedia.org/wiki/Sahara_desert_(ecoregion)

    The Sahara Desert features a hot desert climate (Köppen climate classification BWh).The Sahara Desert is one of the driest and hottest regions of the world, with a mean temperature sometimes over 30 °C (86 °F) and the average high temperatures in summer are over 40 °C (104 °F) for months at a time, and can even soar to 47 °C (117 °F).

  8. North African climate cycles - Wikipedia

    en.wikipedia.org/wiki/North_African_climate_cycles

    The precession of the equinoxes is regarded as the most important orbital parameter in the formation of the "green Sahara" and "desert Sahara" cycle. A January 2019 MIT paper in Science Advances shows a cycle from wet to dry approximately every 20,000 years.

  9. Parts of the Sahara Desert are turning green amid an influx ...

    www.aol.com/parts-sahara-desert-turning-green...

    An extratropical cyclone over the Sahara Desert drenched parts of Morocco and Algeria – bringing up to a year’s worth of rain to some areas. 🌧️ @nasa’s Terra satellite captured ...