Africa - Namibia / Sossusvlei / ナミビアで死んでいる木

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    Deserts take up about one third (33 percent) of the Earth's land surface. Hot deserts usually have a large diurnal and seasonal temperature range, with high daytime temperatures, and low nighttime temperatures (due to extremely low humidity). In hot deserts the temperature in the daytime can reach 45 °C/113 °F or higher in the summer, and dip to 0 °C/32°F or lower in the winter. Water acts to trap infrared radiation from both the sun and the ground, and dry desert air is incapable of blocking sunlight during the day or trapping heat during the night. Thus, during daylight most of the sun's heat reaches the ground, and as soon as the sun sets the desert cools quickly by radiating its heat into space. Urban areas in deserts lack large (more than 14 °C/25 °F) daily temperature variations, partially due to the urban heat island effect.

    Many deserts are formed by rain shadows; mountains blocking the path of precipitation to the desert (on the lee side of the mountain). Deserts are often composed of sand and rocky surfaces. Sand dunes called ergs and stony surfaces called hamada surfaces compose a minority of desert surfaces. Exposures of rocky terrain are typical, and reflect minimal soil development and sparseness of vegetation. The soil is rocky because of the low chemical weathering.

    Bottomlands may be salt-covered flats. Eolian processes are major factors in shaping desert landscapes. Cold deserts (also known as polar deserts) have similar features, except the main form of precipitation is snow rather than rain. Antarctica is the world's largest cold desert (composed of about 98 percent thick continental ice sheet and 2 percent barren rock). Some of the barren rock is to be found in the so-called Dry Valleys of Antarctica that almost never get snow, which can have ice-encrusted saline lakes that suggest evaporation far greater than the rare snowfall due to the strong katabatic winds that evaporate even ice.

    The largest hot desert is the Sahara in northern Africa, covering 9 million square kilometres and 12 countries.

    Deserts sometimes contain valuable mineral deposits that were formed in the arid environment or that were exposed by erosion. Due to extreme and consistent dryness, some deserts are ideal places for natural preservation of artifacts and fossils.

    alld...., kenny barker, and 147 other people added this photo to their favorites.

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    1. FelixSS© 48 months ago | reply

      Please, post your masterpiece photo in:
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    2. NevDev (Nev) 48 months ago | reply

      An amazing photograph.....an instant favourite !

    3. Eustaquio Santimano 41 months ago | reply

      Fantastic composition

    4. fpkeller 40 months ago | reply

      Great capture!

    5. Opimentas 31 months ago | reply

      Great picture.
      Very well done and so beautiful landscape.
      As the place is very atractive too.
      Congratulations on your photo and all your gallery.
      Have a nice day and wonderful weekend.

      Segurando as pontas ( Holding on )

    6. silwittmann ON-OFF - INTERNET FAILING 31 months ago | reply

      ♪-----♪ Your photo/art was seen in -
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      Super wiki grupo- incrivelmente colorido
      ♪-----♪ 1 post 2 comments please ♪-----♪

    7. FelixSS© 31 months ago | reply

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      You deserve the SHOW THE BEST Award !!!
      Thank you for sharing your beautiful photo !


      Seen in:
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    8. FelixSS© 31 months ago | reply

      --
      You have been invited to join &
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    9. Ed_Winchester 28 months ago | reply

      Beautiful shot.

    10. Ameer Hamza 28 months ago | reply

      Seems like a very popular place.

    11. Lee Saborío 28 months ago | reply

      Congrats on the Blog!
      Great info, and colors!
      Circular polarizer?

    12. jacilluch 28 months ago | reply

      fantastica ♥ ♥ ♥

    13. Nina Matthews Photography 28 months ago | reply

      This is wonderful wow !!

    14. 7 seater cars 28 months ago | reply

      Wow! what a wonderful place.7 seater cars.

    15. Khaled Galal 28 months ago | reply

      Great colors.

    16. helena.vanova 28 months ago | reply

      Seen on:
      the Património Geológico e Mineiro


      The Património Geológico e Mineiro

    17. Poliplane 27 months ago | reply

      C'est iréel!!

    18. Adamina 27 months ago | reply

      Your work is amazing, very inspiring!

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