The average lowest temperature is near 30 degrees Fahrenheit though it can drop down to about 5 or 10 degrees. Much of the rain comes in winter. Irrigation is necessary for cultivated crops. Precipitation ranges from 4 to 9 inches annually.
Strong prevailing winds blow from the west and are the strongest during spring. Most Hot and Dry Deserts don't have very many plants.
They do have some low down plants though. The only animals they have that can survive have the ability to burrow under ground. This is because they would not be able to live in the hot sun and heat. They only come out in the night when it is a little cooler. A cold desert is a desert that has snow in the winter instead of just dropping a few degrees in temperature like they would in a Hot and Dry Desert.
It never gets warm enough for plants to grow. Just maybe a few grasses and mosses. The animals in Cold Deserts also have to burrow but in this case to keep warm, not cool. That is why you might find some of the same animals here as you would in the Hot and Dry Deserts. Deserts cover about one fifth of the Earth's land surface.
Cold Deserts are near the Arctic part of the world. In the midst of these 4 desserts exists numerous deserts in many areas across the globe. Due to the availability of little moisture in the air to capture and hold on to the heat emanating from the high temperatures during the day, desert nights are typically cold. A combination of extreme temperature fluctuations and incredibly low levels of water makes the desert biome a very harsh land mass to live in.
The ground surface then heats up the surrounding air. When night falls, the exact opposite happens. The heated ground, plus the hot air, radiates the heat absorbed during the day back to the atmosphere, triggering rapid drop in temperatures.
Temperatures at night can plummet to zero degrees Celsius. Precipitation in hot and dry deserts is a lot different from precipitation in cold deserts.
Hot and cold deserts typically receive very little rainfall, an average of 15 cm per year. Cold deserts, on the other hand, experience a lot of snow and receive rain in spring, an average of cm, to be exact. Most deserts occur far away from the coasts, in locations where moisture emanating from the oceans and seas hardly reaches.
However, some deserts are situated on the west coast of some continents like the Atacama in Chile and Namibia in Africa, culminating in coastal fog deserts whose aridity is caused by cold ocean currents. The Australian deserts consist of a collection of lowlands arid eco-regions in the heartland of Australia. They are hardly inhabited, and their average population density is lower than one person per square kilometer. Of all the deserts in the world, Australian deserts have the lowest human population, by far.
These desert biomes are located in Sub-Saharan Africa, including the southern fringe of the Arabian Peninsula. The biome receives a lot of pressure from humans, particularly in Madagascar and the horn of Africa.
These deserts top the world deserts regarding human footprint. Those located in South America cover an area of about , million square miles. However, only 6 percent of this total area is protected. These deserts cover an estimated area of 1. Due to the expansion of urban corporations like Phoenix in the U.
This domain concentrates the largest range of desserts in the entire world, covering an area of a staggering 9. These deserts are famous for their extreme dryness and sheer inaccessibility.
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