how much of the earth's land surface is desert

Almost the entire continent of Antarctica is a polar desert, experiencing little precipitation. The global and regional climate can be altered by an increase in carbon storage, as well as changes in land surface albedo (LSA) and evaporation. Based on this definition, almost one third of all land area is classified as desert. See which countries are gaining forest though natural forest expansion and afforestation. About 90 major, inhabited oases dot the Sahara. The total land surface area of Earth is about 57 308 738 square miles of which about 33% is desert and about 24% is mountainous. It contains all or parts of five continents [1] ( Antarctica, Australia, about 90% of South America, approx. Share Improve this answer Climate change also plays a significant role, increasing the risk of drought. Many desert plants can live for hundreds of years. In all deserts, there is little water available for plants and other organisms.Deserts are found on every continent and cover about one-fifth of Earths land area. These areas exist under a moisture deficit, which means they can frequently lose more moisture through evaporation than they receive from annual precipitation.Despite the common conceptions of deserts as hot, there are cold deserts as well. Desert parks, such as Death Valley National Park, California, attract thousands of visitors every year. Rising from the AshesThe desert city of Phoenix, Arizona, is named for the mythical desert bird that burns to death only to be reborn, rising from its own ashes. There are many great reasons to buy land, but it's very possible to buy a tract that doesn't suit your needs or desires. Long-sleeved, full-length, and often white, these robes shield all but the head and hands from the wind, sand, heat, and cold. All the software and code that we write is open source and made available via GitHub under the permissive MIT license. The world loses 5 million hectares of forest to deforestation each year. The Lyran Giants may be the oldest humanoid race in the Milky Way Galaxy. How much percentage of Earth's area is occupied by land? Sugar cane is a very water-intensive crop mostly harvested in tropical regions. When they open, they also release water vapor. Other plants, such as cacti, have special means of storing and conserving water.Deserts, Land Use, and Climate ChangeSome of the world's semiarid regions are turning into desert at an alarming rate. Only about 20 percent of deserts are covered by sand.The driest deserts, such as Chile's Atacama Desert, have parts that receive less than two milimeters (0.08 inches) of precipitation a year. Archaeologists in the Sahara have been unsuccessfully looking for the Lost Army of Cambyses ever since.Water in the DesertRain is usually the main source of water in a desert, but it falls very rarely. About 33-35% of the earth's land surface is covered by deserts. Brazil is the only other country with more than 10% of global forest cover. The thorny devil, a lizard that lives in the Australian Outback, has a system of tiny grooves and channels on its body that lead to its mouth. They usually shift a few meters a year, but a particularly violent sandstorm can move a dune 20 meters (65 feet) in a single day.Sandstorms may bury everything in their pathrocks, fields, and even towns. Climate scientists predict that global warming will lead to more rainfall in some regions, but less rainfall in other places. Seen from space, the majority of the Earths surface is covered by oceans that makes up 71% of the surface of the Earth, with the remaining 29% for land. This whirling column of hot air picks up dust and dirt. There are barren rock fields in Antarctica that never receive snow, even though theyre incredibly cold. The downsizing of the Grand Staircase-Escalante National Monument poses a threat to some of the 660 bee species that live in the area, while the prospect of a border wall between the United States and Mexico could disconnect a third of 346 native wildlife species from 50 percent or more of their range that lies south of the border, including the desert bighorn sheep (Ovis canadensis nelsoni). WWII soldiers accidentally discovered this ancient royal tomb, Why some people celebrate Christmas in January. A thobe is a full-length, long-sleeved white robe. Over the last 500 years, many have lost habitat or species. The hottest land surface temperatures on Earth are in plant-free desert landscapes. People have damaged forests . In the regions of Uzbekistan and Kazakhstan surrounding the Aral Sea, excessive use of water for agricultural irrigation has been a primary culprit in causing the sea to shrink, leaving behind a saline desert. one third of Africa, and some islands off the continental mainland of Asia) and four oceans ( Indian Ocean, South Atlantic Ocean, South Pacific Ocean, and Southern Ocean ), as well as New Zealand and most of the Pacific Islands in Oceania. The lizard catches rain and dew in these grooves and sucks them into its mouth by gulping.Camels are very efficient water users. According to Earther, 97 percent of the . Subtracting this uninhabitable 57% (32 665 981 mi 2) from the total land area leaves 24 642 757 square miles or 15.77 billion acres of habitable land. Of the total Earth's surface, approximately 20 percent is covered with deserts. Earth's average albedo is about 0.3. These shimmering waves confuse the eye, causing travelers to see distorted images called mirages.Temperature extremes are a characteristic of most deserts. Only about 20 percent of deserts are covered by sand. By the time air masses from coastal areas reach the interior, they have lost all their moisture. The booming desert communities of Las Vegas, Nevada, and Californias Inland Empire are using water faster than the aquifer is being refilled. In the deserts of the Middle East and Asia, nomadic tent communities continue to flourish. In all deserts, there is little water available for plants and other organisms. It differs from air temperature (the temperature given in weather reports . The total land surface area of Earth is about 57 308 738 square miles of which about 33% is desert and about 24% is mountainous. 173,000 km 2 - 115,000km 2 = 58,000 km 2. A large factor in determining whether a biome is a desert is precipitation. The pounding of the soil by the hooves of livestock in ranching, for example, may degrade the soil and augment erosion by wind and water. The amount of water available in a spring varied with the time of the year and the amount of rainfall. Communities, governments, and organizations are working to preserve desert habitats and increase desert productivity. Its a popular practice, and research shows it has real health benefits. Global warming is the most current instance of climate change. Designed to create a productive work environment where teammates can interact and share ideas, this mobile whiteboard's surface area is easily. Global warming threatens to change the ecology of deserts: Higher temperatures may produce more wildfires that alter desert landscapes by eliminating slow-growing trees and shrubs and replacing them with fast-growing grasses.Many desert plants can live for hundreds of years. These features differ from those of wetter regions, which are often gently rounded by regular rainfall and softened by lush vegetation.Water helps carve desert lands. In areas where vegetation is dense, the land surface temperature never rises above 35 degrees Celsius. The largest hot desert in the world, northern Africa's Sahara, reaches temperatures of up to 122 degrees Fahrenheit (50 degrees Celsius) during the day. When citing this topic page, please also cite the underlying data sources. With little vegetation to block it, the wind can carry sand and dust across entire continents and even oceans. Trees and other vegetation are being planted to break the force of the wind and to hold the soil. And in Africa's Sahel region, bordered by the Sahara Desert to the north and savannas to the south, population growth has caused an increase in wood harvesting, illegal farming, and land-clearing for housing, among other changes. The average American produces almost five pounds of waste every day. Dunes migrate constantly with the wind. The rest is water in the form of vast oceans. Many desert dwellers rely on groundwater, stored in aquifers below the surface. Deserts usually have a large diurnal and seasonal temperature range, with high daytime temperatures falling sharply at night. Its single most outstanding feature is that its near-surface environments are the only places in the universe known to harbour life. At the foot of these formations, water drops its burden of gravel, sand, and other sediment, forming deposits called alluvial fans.Many deserts have no drainage to a river, lake, or ocean. More than 75 percent of Earth's land area is already degraded, according to the European Commission's World Atlas of Desertification, and more than 90 percent could become degraded by 2050. But there are solutions. But some deserts are always cold, like the Gobi desert in Asia and the polar deserts of the Antarctic and Arctic, which are the world's largest. Deserts that seem desolate during the day are very active in the cool nighttime air. Hooves from grazing livestock compact the soil, preventing it from absorbing water and fertilizers. The Hohokam used the canals to irrigate their crops. The oil industry draws companies, migrant workers, engineers, geologists, and biologists to the Middle East.DesertificationDesertification is the process of productive cropland turning into non-productive, desert-like environments. WWII soldiers accidentally discovered this ancient royal tomb, Why some people celebrate Christmas in January. Imagine a world without water. Other subtropical deserts include the Kalahari Desert in southern Africa and the Tanami Desert in northern Australia.Coastal DesertsCold ocean currents contribute to the formation of coastal deserts. Nanoclay keeps the sand moist, clumping it together and preventing it from blowing away.Deserts Get HotterRising temperatures can have huge effects on fragile desert ecosystems. Playas, also called sinks, pans, or salt flats, can be hundreds of kilometers wide.The Black Rock Desert in the U.S. state of Nevada, for instance, is all that remains of the prehistoric Lake Lahontan. The Colorado River, for instance, flows through three deserts in the American Southwest: the Great Basin, the Sonoran, and the Mojave. So, despite the presence of millions of liters of water, there is actually little available for plants and animals.The largest desert in the world is also the coldest. Deserts actually make up 33%, or 1/3rd of the lands surface area. A new diet that tricks your body into thinking its fasting may have similar benefits. Clothing is versatile and based on robes made of rectangles of fabric. And among insects, the Namibian desert beetle can harvest fog from the air for water. The plants soak up water quickly and store it in their cells. These areas exist under a moisture deficit, which means they can frequently lose more moisture through evaporation than they receive from annual precipitation. 50 percent c. about 10 percent d. about 25 percent d. about 25 percent 2. The resulting cooler, drier air mass moves away from the Equator. Camels, nicknamed ships of the desert, are widely used for transportation, meat, and milk in the Maghreb (a region in Northwest Africa), the Middle East, and the Indian Subcontinent.People and the DesertAbout 1 billion people live in deserts. It also stores water in a manmade lake, Lake Nasser, to protect the countrys communities and agriculture against drought.Construction of the Aswan High Dam was a huge engineering project. Mars orbits our Sun, a star. Any interactives on this page can only be played while you are visiting our website. The Ghaggar River, in what is now India and Pakistan, was a major water source for Mohenjo-daro, an urban area of the ancient Indus Valley Civilization. The rest is water in the form of vast oceans. Weve also recorded an episode of Astronomy Cast all about planet Earth. Humanoids known as Lyrans have existed long before Earth's recorded history. Most desert birds are restricted to areas near water, such as river banks. This leaves what we call 'habitable land'. Hydrogen molecules in the fat combine with inhaled oxygen to form water. If all of the world's water was poured on the contiguous United States, it would cover the land to a depth of about 107 miles (145 kilometers). Continents Located in the Northern Hemisphere Asia During a sudden storm, water scours the dry, hard-baked land, gathering sand, rocks, and other loose material as it flows. . Heres how to see this increasingly rare phenomenonresponsibly. The study analyzed three factors to assess the integrity and intactness of Earth's ecosystems. Groundwater comes from rain or other precipitation, like snow or hail. "Smallholders are now seen as part of the solution of land degradation rather than a main problem, which was a prevailing view of the past. Animal-friendly laws are gaining traction across the U.S. COVID-19 is more widespread in animals than we thought. But in California, the iconic Joshua treethe oldest found was 1,000 years oldmay not survive a hotter climate, scientists warn. 1996 - 2022 National Geographic Society. If a media asset is downloadable, a download button appears in the corner of the media viewer. Copyright 1996-2015 National Geographic SocietyCopyright 2015-2023 National Geographic Partners, LLC. The Nile provides the most reliable, plentiful source of freshwater in the region. The Sahara Desert crept 100 kilometers (39 miles) south between 1950 and 1975. The ground heats the air so much that air rises in waves you can actually see. Drilling into aquifers provides water for drinking, agriculture, industry, and hygiene. Overgrazing and deforestation remove plants that anchor the soil. The authors also estimated that over 15 billion trees are cut down each year, and the global number of trees has fallen by almost half (46%) since the start of human civilization. Over time, the Ghaggar changed course and now only flows during the rainy monsoon season. In the course of these activities, trees and other vegetation are cleared away, animal hooves pound the dirt, and crops deplete nutrients in the soil. Windbreaks made of trees have been planted throughout the Sahel, the southern border region of the Sahara Desert. Vast tropical forests grow near the equator because: a. warm, moist air rises to form a high pressure region. Fossils and artifacts show that lime and olive trees, oaks, and oleanders once bloomed in the Sahara. However, it comes at a cost to the environment. As global temperatures rise and the human population expands, more of the planet is vulnerable to desertification, the permanent degradation of land that was once arable. Tiny, high windows let in only a little light and helped keep out dust and sand. Figs, olives, and oranges thrive in desert oases and have been harvested for centuries.Some desert areas rely on resources brought from more fertile areasfood trucked in from distant farmlands or, more frequently, water piped from wetter regions. Roads and buildings were washed away, and more than 100 people died.Even in a desert, water and wind eventually wear away softer rock. If no button appears, you cannot download or save the media. What is the fraction of earth that is not. 33% Deserts actually make up 33% or 1/3rd of the land's surface area. Not in a day, and not by twins. The definitions for these categories asdefined bythe UN Food and Agriculture Organization (FAO) are given below.4, Naturally regenerated forest of native species, where there are no clearly visible indications of human activities and the ecological processes are not significantly disturbed.. A soaking rain can change a desert into a wonderland of flowers almost overnight. Antarctica, although not a country, covers the second largest amount of land overall at 2.75%.Meanwhile, the other nations that surpass the 1% mark for surface area include the United States (1.87%), Brazil (1.67%), and Australia (1.51%).. Far from being barren wastelands, deserts are biologically rich habitats with a vast array of animals and plants that have adapted to the harsh conditions there. LST is a measure of heating of the land surfacewhere solar energy is absorbed and re-emittedand it is often significantly hotter than air temperature. The second is the. In the Mojave, the 2013 arrival of the Ivanpah solar thermal plant created concerns about how the facility would affect threatened desert tortoises, and conservationists are working to ensure solar energy projects like these can coexist with wildlife.Other land use changes also threaten to degrade desert habitats. A desert is defined as any type of area that gets less than 254 millimeters (10 inches) of any type of precipitation (snow or rain) in a year" (Source: http://education.seattlepi.com/percent-planet-desert-5203.html ). About 2 billion people live on the drylands that are vulnerable to desertification, which could displace an estimated 50 million people by 2030. Global vegetation greening during recent decades has been observed from various remote sensing data. Sand lizards, native to the deserts of Europe and Asia, are nicknamed dancing lizards because of the way they quickly lift one leg at a time off the hot desert sand. poses a threat to some of the 660 bee species. Satellite images compiled by scientists at the University of Wisconsin-Madison show roughly 17.6 million square kilometers (6.8 million square miles) used to grow crops, with between 32 and 36 million square kilometers (12 and 14 million square miles) used to raise livestock. The rate of evaporation is high enough to remove much of the surface water before it can be absorbed by the ground. It can be folded and unfolded to cover the mouth, nose, and eyes. Desert Environments: Desert environments can be hot or cold with varying degrees of flora and fauna. FAO said the creation of the new database marks a "major improvement" in information regarding the physical characteristics of the Earth's surface. How Much Rangeland is There? What are the four major types of desert? Up to now, FAO said one of the major limitations to getting a good global overview of land cover - e.g. Knowledge on this subject allows for improving the urban climate through better planning and construction of urban infrastructure and adapting cities to . 36% of the United Sates is Rangeland 53% of the 19 Western States is Rangeland Who Manages Rangeland? The most notable desert resource in the world is the massive oil reserves in the Arabian Desert of the Middle East. Desertification has severely reduced the wetland habitats surrounding the lake, as well as its fishery and grazing lands.Desertification is not new. This interactive map shows each countrys share of global forest area. People who migrate to the warm, dry desert for the winter and return to more temperate climates in the spring are sometimes called snowbirds.In rural areas, hot days turn into cool nights, providing welcome relief from the scorching sun. 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