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   BY-: ASHUTOSH
Climate
    Adaptations
    Significance to humans
    Seasons
    Animals
    Plants

   Trade wind deserts

   The trade winds in two belts on the equatorial sides of
    the Horse Latitudes heat up as they move toward the
    Equator. These dry winds dissipate cloud cover,
    allowing more sunlight to heat the land. Most of the
    major deserts of the world lie in areas crossed by the
    trade winds. The world's largest desert, the Sahara of
    North Africa, which has experienced temperatures as
    high as 57° C, is a trade wind desert.
   The Sahara of Africa is the world's largest desert. It
    contains complex linear dunes that are separated by
    almost 6 kilometers. (Skylab photograph).
The Sahara of Africa is the world's
largest desert. It contains complex
linear dunes that are separated by
almost 6 kilometers. (Skylab
photograph).
Midlatitude deserts


   Midlatitude deserts occur between 30°
    and 50° N. and S., poleward of the
    subtropical highpressure zones. These
    deserts are in interior drainage basins far
    from oceans and have a wide range of
    annual temperatures. The Sonoran
    Desert of southwestern North America is
    a typical midlatitude desert.
   A rare rain in the Tengger, a midlatitude
    desert of China, exposes ripples and a
    small blowout on the left. Winds will
    shortly cover or remove these features.
   Rain shadow deserts are formed
    because tall mountain ranges prevent
    moisture-rich clouds from reaching areas
    on the lee, or protected side, of the
    range. As air rises over the mountain,
    water is precipitated and the air loses its
    moisture content. A desert is formed in
    the leeside "shadow" of the range.
This Landsat image shows the Turpan Depression in the rain
shadow desert of the Tian Shan of China. A sand sea is in the
lower center on the right, but desert pavement, gray in color,
  dominates this desert. The few oases in the desert and the
vegetation in the mountains at the top are in red. A blanket of
snow separates the vegetation in the Tian Shan from the rain
                       shadow desert.
Desert
 Animals
   Like many desert animals, red kangaroos
    prefer to sleep in the day, when the
    desert is at it’s hottest, and wake up at
    nighttime, when it is actually very cold.
    That explains why many animals have
    fur, even in hot deserts.
   An addax has long horns. No two addax
    look the same. They all have brown hair,
    but their skin tones vary. Addax never
    drink water! Instead they get all the
    liquid they need from the food they eat.
The desert larks’ feathers
 are a light brown color,
 which means that it is well
 camouflaged in the desert
 sand
 Many plants are found in the desert.
  They usually grow close to the ground.
 These plants have special parts that help
  them save water.
 The special parts are: thick stem, shallow
  and wide roots, and thick skin covered
  with spines instead of leaves
There are several plants that are able to survive in the
desert.
Most plants survive by their long roots to reach
underground water sources.


Prickly Pear
A Variety of cactuses
Dragon Tree
Octillo Plant
Desert Spoon
Boojum
   To avoid the heat, people in deserts have
  to dress up carefully :
    The long, flowing robes shield the skin
  from the sun and allow air to reach the
  body. The clothes are loose-fitting to
  prevent immediate sweat evaporation so
  that the body does not dehydrate so
  quickly in the very dry air. Headgear shields
  the head from the sun. Veils protect the
  face and keep the sand out of the mouth.
  The clothes also keep the people warm at
  night and in winter
South Gobi Desert, Mongolia
Northern Region, Thailand
Sun Dried Brick House of Berber
               Tribe
Merzouga, Sahara Desert, Morocco
Nomad Dome-shaped House
       of Atr Tribe
          Eritrea
   ANTARTIC DESERT
    With a whooping 14.0 million square kilometers,
    Antarctica is the largest desert in the world. Situated
    in the Antarctic region of the southern hemisphere,
    this desert is also the fifth largest of the seven
    continents of the world. An amazing fact about
    Antarctica is that it increases in its size during winter,
    due to the build up of sea ice around the coasts.
    More than 99% of the area is covered with ice and as
    on 21st July, 1983, the lowest temperature which was
    recorded in this continent was a chilling -89.2°C.
The largest of all the hot deserts around the world, and
covering an area of 9,400,000 square kilometers, is the
Sahara desert. It is known to be inhabited by 4 million
people. In its northern parts, the desert has a sub tropical
climate and in the south, a tropical one. Some of the sand
dunes found in this region are known to be as high as 590
ft. The Sahara desert plants include
grass, succulents, shrubs and trees. Fauna in the Sahara
desert comprise dromedary camels and goats (the
domesticated ones), deathstalker Scorpion, secretary
bird, pale fox, spotted hyena, fennec fox, Nubian
bustards, addax, the Sahara cheetah, monitor
lizards, Sand vipers, hyrax, and ostrich.
The second largest desert in North America, the Chihuahua
desert covers a large area of about 362,600 square kilometers;
making it rank third among the largest deserts of the Western
Hemisphere. The desert has a mild temperature which ranges
from 35 - 400C. Unlike other deserts, it is biologically more diverse
and includes plants such as agave, creosote bush, mesquite
tree, prickly pear, sotol, peyote and lechuguilla to name a few. It
has a wide range of animal species ranging from desert
cottontail, black-tailed jack rabbit, cactus mouse, kit fox, cactus
wren to greater road runner. Reptiles include Mojave
rattlesnake, coachwhip snake, new Mexican whiptail lizard,
spinys, horned, collared and geckos. Red-spotted toads and
barred tiger salamander can also be found on this desert.
Also known as the Great Indian desert, the Thar
desert occupies an area of more than 200,000 square
kilometers. Most of it is in the Indian state of
Rajasthan, and runs into the southern portion of
Haryana and Punjab. Desert animals such as the
Great Indian Bustard, the black buck, the Indian
Gazelle and the Indian Wild ass are found here.
Eagles, harriers, falcons, buzzards, etc., are among
the many species of birds that are commonly spotted
in this region. The desert's wide variety of flora
includes many types of tree species, small trees and
shrubs and herbs.
   This desert covers an area of 2,300,000
    square kilometers, and stretches from
    Yemen to the Persian Gulf and Oman to
    Jordan and Iraq. Calligonum crinitum,
    cornulaca Arabica, cyperus
    conglomeratus are the typical plants of
    this desert. The wildlife in this extreme
    environment include dromedary camel,
    gazelles, sand cats, oryx, spiny-tailed
    lizards, monitor lizard and Arabian cobra.
Southern Nevada, Western Arizona, Southwestern
Utah, and Southeastern California come within the
Mojave desert, which covers an area of 25,000
square kilometers. Plants which have adapted
themselves to the environment of the desert are
joshua tree, pinyon pine, mesquite, California juniper
and many other types of cactus and shrubs. The
desert has a wide range of animals and birds;
common examples include gopher snake,
hummingbird, kangaroo rat, Mojave green
rattlesnake, Mojave ground squirrel, rosy boa,
tarantula, and Western Diamondback Rattlesnake to
name a few.
THANK YOU
`




        .

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Ppt

  • 1. BY-: ASHUTOSH
  • 2. Climate Adaptations Significance to humans Seasons Animals Plants 
  • 3. Trade wind deserts  The trade winds in two belts on the equatorial sides of the Horse Latitudes heat up as they move toward the Equator. These dry winds dissipate cloud cover, allowing more sunlight to heat the land. Most of the major deserts of the world lie in areas crossed by the trade winds. The world's largest desert, the Sahara of North Africa, which has experienced temperatures as high as 57° C, is a trade wind desert.  The Sahara of Africa is the world's largest desert. It contains complex linear dunes that are separated by almost 6 kilometers. (Skylab photograph).
  • 4. The Sahara of Africa is the world's largest desert. It contains complex linear dunes that are separated by almost 6 kilometers. (Skylab photograph).
  • 5. Midlatitude deserts  Midlatitude deserts occur between 30° and 50° N. and S., poleward of the subtropical highpressure zones. These deserts are in interior drainage basins far from oceans and have a wide range of annual temperatures. The Sonoran Desert of southwestern North America is a typical midlatitude desert.
  • 6. A rare rain in the Tengger, a midlatitude desert of China, exposes ripples and a small blowout on the left. Winds will shortly cover or remove these features.
  • 7. Rain shadow deserts are formed because tall mountain ranges prevent moisture-rich clouds from reaching areas on the lee, or protected side, of the range. As air rises over the mountain, water is precipitated and the air loses its moisture content. A desert is formed in the leeside "shadow" of the range.
  • 8. This Landsat image shows the Turpan Depression in the rain shadow desert of the Tian Shan of China. A sand sea is in the lower center on the right, but desert pavement, gray in color, dominates this desert. The few oases in the desert and the vegetation in the mountains at the top are in red. A blanket of snow separates the vegetation in the Tian Shan from the rain shadow desert.
  • 10. Like many desert animals, red kangaroos prefer to sleep in the day, when the desert is at it’s hottest, and wake up at nighttime, when it is actually very cold. That explains why many animals have fur, even in hot deserts.
  • 11. An addax has long horns. No two addax look the same. They all have brown hair, but their skin tones vary. Addax never drink water! Instead they get all the liquid they need from the food they eat.
  • 12. The desert larks’ feathers are a light brown color, which means that it is well camouflaged in the desert sand
  • 13.  Many plants are found in the desert. They usually grow close to the ground.  These plants have special parts that help them save water.  The special parts are: thick stem, shallow and wide roots, and thick skin covered with spines instead of leaves
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  • 15. There are several plants that are able to survive in the desert. Most plants survive by their long roots to reach underground water sources. Prickly Pear A Variety of cactuses Dragon Tree Octillo Plant Desert Spoon Boojum
  • 16. To avoid the heat, people in deserts have to dress up carefully :  The long, flowing robes shield the skin from the sun and allow air to reach the body. The clothes are loose-fitting to prevent immediate sweat evaporation so that the body does not dehydrate so quickly in the very dry air. Headgear shields the head from the sun. Veils protect the face and keep the sand out of the mouth. The clothes also keep the people warm at night and in winter
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  • 18. South Gobi Desert, Mongolia
  • 20. Sun Dried Brick House of Berber Tribe Merzouga, Sahara Desert, Morocco
  • 21. Nomad Dome-shaped House of Atr Tribe Eritrea
  • 22. ANTARTIC DESERT With a whooping 14.0 million square kilometers, Antarctica is the largest desert in the world. Situated in the Antarctic region of the southern hemisphere, this desert is also the fifth largest of the seven continents of the world. An amazing fact about Antarctica is that it increases in its size during winter, due to the build up of sea ice around the coasts. More than 99% of the area is covered with ice and as on 21st July, 1983, the lowest temperature which was recorded in this continent was a chilling -89.2°C.
  • 23. The largest of all the hot deserts around the world, and covering an area of 9,400,000 square kilometers, is the Sahara desert. It is known to be inhabited by 4 million people. In its northern parts, the desert has a sub tropical climate and in the south, a tropical one. Some of the sand dunes found in this region are known to be as high as 590 ft. The Sahara desert plants include grass, succulents, shrubs and trees. Fauna in the Sahara desert comprise dromedary camels and goats (the domesticated ones), deathstalker Scorpion, secretary bird, pale fox, spotted hyena, fennec fox, Nubian bustards, addax, the Sahara cheetah, monitor lizards, Sand vipers, hyrax, and ostrich.
  • 24. The second largest desert in North America, the Chihuahua desert covers a large area of about 362,600 square kilometers; making it rank third among the largest deserts of the Western Hemisphere. The desert has a mild temperature which ranges from 35 - 400C. Unlike other deserts, it is biologically more diverse and includes plants such as agave, creosote bush, mesquite tree, prickly pear, sotol, peyote and lechuguilla to name a few. It has a wide range of animal species ranging from desert cottontail, black-tailed jack rabbit, cactus mouse, kit fox, cactus wren to greater road runner. Reptiles include Mojave rattlesnake, coachwhip snake, new Mexican whiptail lizard, spinys, horned, collared and geckos. Red-spotted toads and barred tiger salamander can also be found on this desert.
  • 25. Also known as the Great Indian desert, the Thar desert occupies an area of more than 200,000 square kilometers. Most of it is in the Indian state of Rajasthan, and runs into the southern portion of Haryana and Punjab. Desert animals such as the Great Indian Bustard, the black buck, the Indian Gazelle and the Indian Wild ass are found here. Eagles, harriers, falcons, buzzards, etc., are among the many species of birds that are commonly spotted in this region. The desert's wide variety of flora includes many types of tree species, small trees and shrubs and herbs.
  • 26. This desert covers an area of 2,300,000 square kilometers, and stretches from Yemen to the Persian Gulf and Oman to Jordan and Iraq. Calligonum crinitum, cornulaca Arabica, cyperus conglomeratus are the typical plants of this desert. The wildlife in this extreme environment include dromedary camel, gazelles, sand cats, oryx, spiny-tailed lizards, monitor lizard and Arabian cobra.
  • 27. Southern Nevada, Western Arizona, Southwestern Utah, and Southeastern California come within the Mojave desert, which covers an area of 25,000 square kilometers. Plants which have adapted themselves to the environment of the desert are joshua tree, pinyon pine, mesquite, California juniper and many other types of cactus and shrubs. The desert has a wide range of animals and birds; common examples include gopher snake, hummingbird, kangaroo rat, Mojave green rattlesnake, Mojave ground squirrel, rosy boa, tarantula, and Western Diamondback Rattlesnake to name a few.