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"Atacama" redirects here. For other uses, see Atacama (disambiguation).
Coordinates: 24°30′S 69°15′W
Atacama by NASA World Wind
Countries Chile, Peru, Bolivia, Argentina
Area 105,000 km2 (40,541 sq mi)
Map of Atacama Desert. The area most commonly defined as Atacama is yellow. In orange are the outlying arid areas of Sechura Desert, Altiplano, Puna de Atacama and Norte Chico.
A chilla in Pan de Azúcar National Park on the coast of the Atacama Desert.
The Atacama Desert (Spanish: Desierto de Atacama) is a plateau in South America, covering a 600-mile (1,000 km) strip of land on the Pacific coast, west of the Andes mountains. It is, according to NASA, National Geographic and many other publications, the driest desert in the world. The Atacama occupies 40,600 square miles (105,000 km2) in northern Chile, composed mostly of salt lakes (salares), sand, and felsic lava flows towards the Andes.
2.1 Comparison to Mars
3 Human occupation
3.1 Abandoned nitrate mining towns
4 Astronomical observatories
6 Protected areas
8 See also
10 External links
The Atacama Desert ecoregion, as defined by the World Wide Fund for Nature (WWF), extends from a few kilometers south of the Peru–Chile border to about 30° south latitude. To the north lies the Peruvian Sechura Desert ecoregion, whilst to the south is the Chilean Matorral ecoregion.
The National Geographic Society, by contrast, considers the coastal area of southern Peru to be part of the Atacama Desert. It includes in this definition the deserts south of the Ica Region in Peru.
To the east lies the less arid Central Andean dry puna ecoregion. The drier portion of this ecoregion is located south of the Loa River between the parallel Sierra Vicuña Mackenna and Cordillera Domeyko. To the north of the Loa lies the Pampa del Tamarugal.
The Atacama Desert is commonly known as the driest place in the world, especially surroundings of the abandoned Yungay town (in Antofagasta Region, Chile). The average rainfall in the Chilean region of Antofagasta is just 1 millimetre (0.04 in) per year. Some weather stations in the Atacama have never received rain. Evidence suggests that the Atacama may not have had any significant rainfall from 1570 to 1971. It is so arid that mountains that reach as high as 6,885 metres (22,589 ft) are completely free of glaciers and, in the southern part from 25°S to 27°S, may have been glacier-free throughout the Quaternary, though permafrost extends down to an altitude of 4,400 metres (14,400 ft) and is continuous above 5,600 metres (18,400 ft). Studies by a group of British scientists have suggested that some river beds have been dry for 120,000 years. However, some locations in the Atacama receive a marine fog known locally as the camanchaca, providing sufficient moisture for hypolithic algae, lichens and even some cacti – the genus Copiapoa is notable among these. Geographically, the aridity can be explained by the following reasons:
The desert is located on the leeward side of the Chilean Coast Range, so little moisture from the Pacific Ocean can reach the desert.
The Andes are so high that they block convective clouds, which may bring precipitation, formed above the Amazon Basin from entering the desert from the east.
An inversion layer is created by the cold Humboldt current and the South Pacific High.
The rain that would change the climate of the land mostly falls at sea instead. Largely this is caused by the cold waters of the Humboldt current just off shore. The temperature change causes most of the clouds and the rain to occur over the ocean instead of over the land. 
In July 2011, an extreme Antarctic cold front broke through the rain shadow, bringing 80 cm (31.5 in) of snow to the plateau, stranding residents across the region, particularly in Bolivia, where many drivers became stuck in snow drifts and emergency crews became overtaxed with a large number of rescue calls. The total rainfall for the winter of 2011 was sufficient for wildflowers to bloom in the Atacama.
Comparison to Mars
In a region about 100 kilometres (60 mi) south of Antofagasta, which averages 3,000 metres (10,000 ft) height, the soil has been compared to that of Mars. Due to its otherworldly appearance, the Atacama has been used as a location for filming Mars scenes, most notably in the television series Space Odyssey: Voyage To The Planets.
In 2003, a team of researchers published a report in the journal Science titled "Mars-like Soils in the Atacama Desert, Chile, and the Dry Limit of Microbial Life" in which they duplicated the tests used by the Viking 1 and Viking 2 Mars landers to detect life, and were unable to detect any signs in Atacama Desert soil. The region may be unique on Earth in this regard and is being used by NASA to test instruments for future Mars missions. The team duplicated the Viking tests in Mars-like Earth environments and found that they missed present signs of life in soil samples from Antarctic dry valleys, the Atacama Desert of Chile and Peru, and other locales.
In 2008, the Phoenix Mars Lander detected perchlorates on the surface of Mars at the same site where water was first discovered. Perchlorates are also found in the Atacama and associated nitrate deposits have contained organics, leading to speculation that signs of life on Mars are not incompatible with perchlorates. The Atacama is also a testing site for the NASA-funded Earth-Mars Cave Detection Program.
The Atacama is sparsely populated, with most cities located along the Pacific coast. In interior areas, oases and some valleys have been populated for millennia, being the seat of the most advanced Pre-Columbian societies found in Chile. These oases have had little population growth and urban development, and have, since the 20th century, faced conflicts over water resources that are needed for the coastal cities and the mining industry.
San Pedro de Atacama, at about 2,000 metres (7,000 ft) elevation, is a typical example. Its church was built by the Spanish in 1577. In pre-Hispanic times, before the Inca empire, the extremely arid interior was inhabited mainly by the Atacameño tribe. The tribe is noted for the construction of fortified towns called pucarás, one of which can be seen a few kilometers from San Pedro de Atacama.
The coastal cities originated in the 16th, 17th, and 18th centuries during the time of the Spanish Empire, when they emerged as shipping ports for silver produced in Potosí and other mines. During the 19th century the desert came under control of Bolivia, Chile, and Peru, and soon became a zone of conflict due to unclear borders and the discovery of sodium nitrate deposits. After the War of the Pacific, in which Chile annexed most of the desert, cities along the coast developed into international ports, and many Chilean workers migrated there. With the guano and saltpeter booms of the 19th century the population grew immensely, mostly due to immigration from central Chile. In the 20th century the nitrate industry declined and at the same time the largely male population of the desert became increasingly problematic for the Chilean state. Mineworkers and mining companies came into conflict, and protests spread throughout the region.
The Atacama desert again became a source of wealth from the 1950s onwards due to copper mining. The Escondida and Chuquicamata porphyry copper mines are located within the Atacama Desert.
Abandoned nitrate mining towns
The desert has rich deposits of copper and other minerals, and the world's largest natural supply of sodium nitrate, which was mined on a large scale until the early 1940s. The Atacama border dispute over these resources between Chile and Bolivia began in the 19th century.
Now the desert is littered with approximately 170 abandoned nitrate (or "saltpetre") mining towns, almost all of which were shut down decades after the invention of synthetic nitrate in Germany at the turn of the 20th century (see Haber process). The towns include Chacabuco, Humberstone, Santa Laura, Pedro de Valdivia, Puelma and María Elena and Oficina Anita.
Paranal Observatory 360-panorama.
Because of its high altitude, nearly non-existent cloud cover, dry air, and lack of light pollution and radio interference from the very widely spaced cities, the desert is one of the best places in the world to conduct astronomical observations. The European Southern Observatory operates two major observatories in the Atacama:
The La Silla Observatory
The Paranal Observatory, which includes the Very Large Telescope
A new radio astronomy telescope, called ALMA, built by Europe, Japan, the United States, Canada and Chile in the Llano de Chajnantor Observatory officially opened on 3 October 2011. A number of radio astronomy projects, such as the CBI, the ASTE and the ACT, among others, have been operating in the Chajnantor area since 1999.
High copper content makes the soil red in parts of Atamaca, sites of ancient copper mines...
Chileans in Space
The Nomad Rover in Atamaca
April 12, 2011 marked the 50th anniversary of Yuri Gagarin’s 108-minute trip around the world and the beginning of human spaceflight. If you’re an expat like me, your thoughts probably go abroad when you contemplate space exploration,* but for a little country, Chile does more stargazing than you might expect.
Did you know…
Arid northern Chile is home to over 20 astronomical observatories
The Atacama is Mars on Earth: the Atacama desert’s famously dry climate also makes it an ideal spot to study the properties of soil on the moon and Mars.
Mining is like space travel underground: After the 2010 accident at Copipó’s San José mine, Chilean government received assistance from U.S. space agency NASA on medical, nutritional and behavioral health issues affecting the the 33 miners, as well as on the design of the Fénix capsules used to rescue them.
Chile created its own Space Agency in 2001. (However, its political dependence on the Ministry and Under-Secretariat of Economy suggests a mission more closely aligned with foreign investment than scientific research.)
Aerospace engineer Klaus von Storch, of Osorno, was selected for a mission to visit the International Space Station in 2002, but did not go (sources cite lack of funds, a failed medical exam, and post-Columbia confusion as reasons). He left the Air Force several years ago but apparently still hopes to be the first Chilean astronaut.
While Chile has yet to send a human to space, in 1999 they did manage to send some lucky ladybugs in order to prove their offworld pest-control efficacy.
The Google Lunar X Prize: Angelicum Chile was one of 29 teams selected in February 2011 to compete for the $30 million Google Lunar X PRIZE, “an unprecedented competition to send a robot to the Moon that travels at least 500 meters and transmit video, images, and data back to the Earth.” Angelicum themselves say that through this effort they hope to “motivate and encourage our citizens and discover new talents, especially in the area of the technology and science.”
Astrophiles planning to stick around for a while may get the chance to visit the European Southern Observatory’s Extremely Large Telescope, which is to be constructed in Chile and is scheduled for completion towards the end of the decade. (Plans for the Overwhelmingly Large Telescope were scrapped due to its estimated €1.5 billion price tag.)
* By contrast, your thoughts apparently turn to space travel when choosing a logo for your Chilean website.
Some more pics of the Atamaca Desert....
And pics from NASA/JPL Mars Rover Curiosity
Did NASA buy off Russia and China's silence (they have satellites) about this by giving them exclusive shuttle launch rights while the elites laundered the 5 billion plus for the mission and shoot it in the Atamaca desert...?
Marcydare wrote:You Sir, have stumbled upon a very disturbing possibility.
Yeah its really disturbing how rocks look like others rocks! wow mind blowing!
Master Raphael wrote:what you call the law of attraction was missing a vital aspect to the theory that I call the law of repulsion ...it is clear I drove the two of you together...using my repulsion not attraction
High copper content makes the soil red in parts of Atamaca, sites of ancient copper mines...
@ otoel...its not just the rocks....
Sorry, but wouldn't oxidized copper make the soil greenish ?
No, and I thought you thought is was in Arizona, are ya with me on this one?
Harbin wrote:Yeah. The shit is green !
However the Atacama desert does look like an excellent location for the rover facade. Thanks for the heads up on this one !
green/red good christmas colors for nasa whats it matter
your welcome for the heads up
awesome, i am so glad i did not lose this thread, took alot of time to compile the pics and write this
lost a few comments buts that ok
i bumped this just to remind everyone that THE MARS ROVER IS IN SOUTH AMERICA
and atleast is was not NASA who hacked the site
I mispelled "Atacama Desert" to "Atamaca Desert" for a reason, but nobody noticed..
keeps the nasa web bots away!
I may have some things to add to this, and strangely enough too remember this desert is where steve greer found his 6 inch sirius alien
i gotta make some plans to visit here someday.......
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