Biosphere 2 facts for kids
Quick facts for kids Biosphere 2 |
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Exterior of Biosphere 2
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| General information | |
| Type | Research facility |
| Location | Oracle, Arizona, United States |
| Address | 32540 S Biosphere Rd, Oracle, AZ 85739 |
| Coordinates | 32°34′44″N 110°51′02″W / 32.578778°N 110.850594°W |
| Elevation | 3,820 ft (1,164 m) |
| Construction started | 1987 |
| Completed | 1991 |
| Owner | University of Arizona |
| Technical details | |
| Floor area | 3.14 acres (12,700 m2) |
| Grounds | 40 acres (160,000 m2) |
Biosphere 2 is an American Earth system science research facility located in Oracle, Arizona. Its mission is to serve as a center for research, outreach, teaching, and lifelong learning about Earth, its living systems, and its place in the universe. It is a 3.14-acre (1.27-hectare) structure originally built to be an artificial, materially closed ecological system, or vivarium. It remains the largest closed ecological system ever created.
Constructed between 1987 and 1991, Biosphere 2 was originally meant to demonstrate the viability of closed ecological systems to support and maintain human life in outer space as a substitute for Earth's biosphere. It was designed to explore the web of interactions within life systems in a structure with different areas based on various biological biomes. In addition to the several biomes and living quarters for people, there was an agricultural area and work space to study the interactions between humans, farming, technology and the rest of nature as a new kind of laboratory for the study of the global ecology. Its mission was a two-year closure experiment with a crew of eight humans ("biospherians"). Long-term it was seen as a precursor to gaining knowledge about the use of closed biospheres in space colonization. As an experimental ecological facility it allowed the study and manipulation of a mini biospheric system without harming Earth's biosphere.
Its seven biome areas were a 1,900-square-meter (20,000 sq ft) rainforest, an 850-square-meter (9,100 sq ft) ocean with a coral reef, a 450-square-meter (4,800 sq ft) mangrove wetlands, a 1,300-square-metre (14,000 sq ft) savannah grassland, a 1,400-square-meter (15,000 sq ft) fog desert, and two anthropogenic biomes: a 2,500-square-meter (27,000 sq ft) agricultural system and a human habitat with living spaces, laboratories and workshops. Below ground was an extensive part of the technical infrastructure. Heating and cooling water circulated through independent piping systems and passive solar input through the glass space frame panels covering most of the facility, and electrical power was supplied into Biosphere 2 from an onsite natural gas energy center.
Biosphere 2 was only used twice for its original intended purposes as a closed-system experiment: once from 1991 to 1993, and the second time from March to September 1994. Both attempts ran into problems including low amounts of food and oxygen, die-offs of many animals and plants included in the experiment (though this was anticipated since the project used a strategy of deliberately "species-packing" anticipating losses as the biomes developed), group dynamic tensions among the resident crew, outside politics, and a power struggle over management and direction of the project. Nevertheless, the closure experiments set world records in closed ecological systems, agricultural production, health improvements with the high nutrient and low caloric diet the crew followed, and insights into the self-organization of complex biomic systems and atmospheric dynamics. The second closure experiment achieved total food sufficiency and did not require injection of oxygen.
In June 1994, during the middle of the second experiment, the managing company, Space Biosphere Ventures, was dissolved, and the facility was left in limbo. Columbia University assumed management of the facility in 1995 and used it to run experiments until 2003. It then appeared to be in danger of being demolished to make way for housing and retail stores, but was taken over for research by the University of Arizona in 2007. The University of Arizona took full ownership of the structure in 2011.
Contents
Planning and construction
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The Biosphere 2 project was launched in 1984 by businessman and billionaire philanthropist Ed Bass and systems ecologist John P. Allen, with Bass providing US$150 million in funding until 1991. Bass and Allen had met in the 1970s at the Synergia Ranch, a counterculture community led by Allen, who advocated Buckminster Fuller's "Spaceship Earth" concept and explored the idea of biospheres as a refuge from disasters such as nuclear war. Several other former members of Synergia Ranch also joined the Biosphere 2 project.
Construction was carried out between 1987 and 1991 by Space Biosphere Ventures, a joint venture whose principal officers were John P. Allen, inventor and executive chairman; Margaret Augustine, CEO; Marie Harding, vice-president of finance; Abigail Alling, vice president of research; Mark Nelson, director of space and environmental applications, William F. Dempster, director of system engineering, and Norberto Alvarez-Romo, vice president of mission control.
It was named "Biosphere 2" because it was meant to be the second fully self-sufficient biosphere, after the Earth itself ("Biosphere 1").
Location
The glass and spaceframe facility is located in Oracle, Arizona at the base of the Santa Catalina Mountains, about 50 minutes north of Tucson. Its elevation is around 4,000 feet (1,200 m) above sea level.
Engineering
The above-ground physical structure of Biosphere 2 was made of steel tubing and high-performance glass and steel frames. The frame and glazing materials were designed and made to specification by a firm run by a one-time associate of Buckminster Fuller, Peter Jon Pearce (Pearce Structures, Inc.). The window seals and structures had to be designed to be almost perfectly airtight, such that the air exchange would be extremely low, permitting tracking of subtle changes over time. The patented airtight sealing methods, developed by Pearce and William Dempster, achieved a leak rate of less than 10% per year. Without such tight closure, the slow decline of oxygen which occurred at a rate of less than 1⁄4% per month during the first two-year closure experiment might not have been detected.
During the day, the heat from the sun caused the air inside to expand and during the night it cooled and contracted. To avoid having to deal with the huge forces that maintaining a constant volume would create, the structure had large diaphragms kept in domes called "lungs" or variable volume structures.
Since opening a window was not an option, the structure also required a sophisticated system to regulate temperatures within desired parameters, which varied for the different biomic areas. Though cooling was the largest energy need, heating had to be supplied in the winter and closed loop pipes and air handlers were key parts of the energy system. An energy center on site provided electricity and heated and cooled water, employing natural gas and backup generators, ammonia chillers and water cooling towers.
First mission
The first closed mission lasted from September 26, 1991, to September 26, 1993. The crew were: medical doctor and researcher Roy Walford, Jane Poynter, Taber MacCallum, Mark Nelson, Sally Silverstone, Abigail Alling, Mark Van Thillo, and Linda Leigh.
The agricultural system produced 83% of the total diet, which included crops of bananas, papayas, sweet potatoes, beets, peanuts, lablab and cowpea beans, rice, and wheat. Especially during the first year, the eight inhabitants reported continual hunger. Calculations indicated that Biosphere 2's farm was amongst the highest producing in the world "exceeding by more than five times that of the most efficient agrarian communities of Indonesia, southern China, and Bangladesh".
They consumed the same low-calorie, nutrient-dense diet that Roy Walford had studied in his research on extending lifespan through diet. Medical markers indicated the health of the crew during the two years was excellent. They showed the same improvement in health indices such as lowering of blood cholesterol, blood pressure, enhancement of immune system. They lost an average of 16% of their pre-entry body weight before stabilizing and regaining some weight during their second year. Subsequent studies showed that the biospherians' metabolism became more efficient at extracting nutrients from their food as an adaptation to the low-calorie, high nutrient diet. "The overall health of the biospherians crews inside Biosphere 2 confirm that the original design of the Biosphere 2 technosphere systems did avoid a buildup of toxins, and the bioregenerative technologies and life systems inside Biosphere 2 maintained a healthy environment."
Some of the domestic animals that were included in the agricultural area during the first mission included: four African pygmy goats and one billy goat; 35 hens and three roosters (a mix of Indian jungle fowl (Gallus gallus), Japanese silky bantam, and a hybrid of these); two sows and one boar Ossabaw dwarf pigs; and tilapia fish grown in a rice and azolla pond system originating millennia ago in China.
A strategy of "species-packing" was practiced to ensure that food webs and ecological function could be maintained if some species did not survive. The fog desert area became more chaparral in character due to condensation from the space frame. The savannah was seasonally active; its biomass was cut and stored by the crew as part of their management of carbon dioxide. Rainforest pioneer species grew rapidly, but trees there and in the savannah suffered from etiolation and weakness caused by lack of stress wood, normally created in response to winds in natural conditions. Corals reproduced in the ocean area, and crew helped maintain ocean system health by hand-harvesting algae from the corals, manipulating calcium carbonate and pH levels to prevent the ocean becoming too acidic, and by installing an improved protein skimmer to supplement the algae turf scrubber system originally installed to remove excess nutrients. The mangrove area developed rapidly but with less understory than a typical wetland possibly because of reduced light levels. Nevertheless, it was judged to be a successful analogue to the Everglades area of Florida where the mangroves and marsh plants were collected.
Biosphere 2, because of its small size and buffers, and concentration of organic materials and life, had greater fluctuations and more rapid biogeochemical cycles than are found in Earth's biosphere. Most of the introduced vertebrate species and virtually all of the pollinating insects died, though there was reproduction of plants and animals. Insect pests, like cockroaches, flourished. Many insects had been included in original species mixes in the biomes but a globally invasive tramp ant species, Paratrechina longicornis, unintentionally sealed in, had come to dominate other ant species. The planned ecological succession in the rainforest and strategies to protect the area from harsh incident sunlight and salt aerosols from the ocean worked well, and a surprising amount of the original biodiversity persisted. Biosphere 2 in its early ecological development was likened to an island ecology.
Challenges
Among the problems and miscalculations encountered in the first mission were unanticipated condensation making the "desert" too wet, population explosions of greenhouse ants and cockroaches, morning glories overgrowing the rainforest area blocking out other plants, and less sunlight (40–50% of outside light) entering the facility than originally anticipated. Biospherians intervened to control invasive plants when needed to preserve biodiversity, functioning as "keystone predators". In addition, construction itself was a challenge; for example, it was difficult to manipulate the bodies of water to have waves and tidal changes. Engineers came up with innovative solutions to supplement natural functions the Earth's biosphere normally performs, e.g. vacuum pumps to create gentle waves in the ocean without endangering marine biota, sophisticated heating and cooling systems. All the technology was selected to minimize outgassing and discharge of harmful substances which might damage Biosphere 2's life.
There was controversy when the public learned that the project had allowed an injured member to leave and return, carrying new material inside. The team claimed the only new supplies brought in were plastic bags, but others accused them of bringing food and other items. More criticism was raised when it was learned that, likewise, the project injected oxygen in January 1993 to make up for a failure in the balance of the system that resulted in the amount of oxygen steadily declining. Some thought that these criticisms ignored that Biosphere 2 was an experiment where the unexpected would occur, adding to knowledge of how complex ecologies develop and interact, not a demonstration where everything was known in advance. H. T. Odum noted: "The management process during 1992–1993 using data to develop theory, test it with simulation, and apply corrective actions was in the best scientific tradition. Yet some journalists crucified the management in the public press, treating the project as if it was an Olympic contest to see how much could be done without opening the doors".
The oxygen inside the facility, which began at 20.9%, fell at a steady pace and after 16 months was down to 14.5%. This is equivalent to the oxygen availability at an elevation of 4,080 metres (13,390 ft). Since some biospherians were starting to have symptoms like sleep apnea and fatigue, Walford and the medical team decided to boost oxygen with injections in January and August 1993. The oxygen decline and minimal response of the crew indicated that changes in air pressure are what trigger human adaptation responses. These studies enhanced the biomedical research program.
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Managing CO2 levels was a particular challenge, and a source of controversy regarding the Biosphere 2 project's alleged misrepresentation to the public. Daily fluctuation of carbon dioxide dynamics was typically 600 ppm because of the strong drawdown during sunlight hours by plant photosynthesis, followed by a similar rise during the nighttime when system respiration dominated. As expected, there was also a strong seasonal signature to CO2 levels, with wintertime levels as high as 4,000–4,500 ppm and summertime levels near 1,000 ppm. The crew worked to manage the CO2 by occasionally turning on a CO2 scrubber, activating and de-activating the desert and savannah through control of irrigation water, cutting and storing biomass to sequester carbon, and utilizing all potential planting areas with fast-growing species to increase system photosynthesis. In November 1991, investigative reporting in The Village Voice alleged that the crew had secretly installed the CO2 scrubber device, and claimed that this violated Biosphere 2's advertised goal of recycling all materials naturally. Others pointed out there was nothing secret about the carbon dioxide device and it constituted another technical system augmenting ecological processes. The carbon precipitator could reverse the chemical reactions and thus release the stored carbon dioxide in later years when the facility might need additional carbon.
The soils were selected to have enough carbon to provide for the plants of the ecosystems to grow from infancy to maturity, a plant mass increase of perhaps 20 short tons (18,000 kg). The release rate of that soil carbon as carbon dioxide by respiration of soil microbes was an unknown that the Biosphere 2 experiment was designed to reveal. Subsequent research showed that Biosphere 2's farm soils had reached a more stable ratio of carbon and nitrogen, lowering the rate of CO2 release, by 1998.
The respiration rate was faster than the photosynthesis (possibly in part due to relatively low light penetration through the glazed structure and the fact that Biosphere 2 started with a small but rapidly increasing plant biomass) resulting in a slow decrease of oxygen. A mystery accompanied the oxygen decline: the corresponding increase in carbon dioxide did not appear. This concealed the underlying process until an investigation by Jeff Severinghaus and Wallace Broecker of Columbia University's Lamont–Doherty Earth Observatory using isotopic analysis showed that carbon dioxide was reacting with exposed concrete inside Biosphere 2 to form calcium carbonate in a process called carbonatation, thereby sequestering both carbon and oxygen.
Second mission
After Biosphere 2's first mission, extensive research and system improvements were undertaken, including sealing concrete to prevent the uptake of carbon dioxide. The second mission began on March 6, 1994, with an announced run of ten months. The crew was Norberto Alvarez-Romo (Capt.), John Druitt, Matt Finn, Pascale Maslin, Charlotte Godfrey, Rodrigo Romo and Tilak Mahato. The second crew achieved complete sufficiency in food production.
On April 1, 1994, a severe dispute within the management team led to the ousting of the on-site management by federal marshals serving a restraining order, and financier Ed Bass hired Steve Bannon, then-manager of the Bannon & Co. investment banking team from Beverly Hills, California, to run Space Biospheres Ventures. The project was put into receivership and an outside management team was installed for the receiver to turn around the floundering project. The reason for the dispute was threefold. Mismanagement of the mission had caused terrible publicity, financial mismanagement and lack of research. People alleged gross financial mismanagement of the project, leading to a loss of $25 million in fiscal year 1992. Some crew members and staff were concerned about Bannon, who had previously investigated cost overruns at the site; two former Biosphere 2 crew members flew back to Arizona to protest the hire and broke into the compound to warn the crew members that Bannon and the new management would jeopardize their safety.
At 3 a.m. on April 5, 1994, Abigail Alling and Mark Van Thillo, members of the first crew, allegedly vandalized the project from outside, opening one double-airlock door and three single door emergency exits, leaving them open for about 15 minutes. Five panes of glass were also broken. Alling later told the Chicago Tribune that she "considered the Biosphere to be in an emergency state ... In no way was it sabotage. It was my responsibility." About 10% of the Biosphere's air was exchanged with the outside during this time, according to systems analyst Donella Meadows, who received a communication from Alling saying that she and Van Thillo judged it their ethical duty to give those inside the choice of continuing with the drastically changed human experiment or leaving, as they didn't know what the crew had been told of the new situation. "On April 1, 1994, at approximately 10 AM ... limousines arrived on the biosphere site ... with two investment bankers hired by Mr. Bass ... They arrived with a temporary restraining order to take over direct control of the project ... With them were 6-8 police officers hired by the Bass organization ... They immediately changed locks on the offices ... All communication systems were changed (telephone and access codes), and [we] were prevented from receiving any data regarding safety, operations, and research of Biosphere 2." Alling emphasized several times in her letter that the "bankers" who suddenly took over "knew nothing technically or scientifically, and little about the biospherian crew".
Four days later, the captain Norberto Alvarez-Romo (by then married to Biosphere 2 chief executive Margaret Augustine) precipitously left the Biosphere for a "family emergency" after his wife's suspension. He was replaced by Bernd Zabel, who had been nominated as captain of the first mission but who was replaced at the last minute. Two months later, Matt Smith replaced Matt Finn.
The ownership and management company Space Biospheres Ventures was dissolved on June 1, 1994. This left the scientific and business management of the mission to the interim turnaround team, who had been contracted by the financial partner, Decisions Investment Co.
Mission 2 was ended prematurely on September 6, 1994. No further total system science has emerged from Biosphere 2 as the facility was changed by Columbia University from a closed ecological system to a "flow-through" system where CO2 could be manipulated at desired levels.
Science
A special issue of the Ecological Engineering journal edited by Marino and Howard T. Odum and published in 1999 as "Biosphere 2: Research Past and Present" represents the most comprehensive assemblage of collected papers and findings from Biosphere 2. The papers range from calibrated models that describe the system metabolism, hydrologic balance, and heat and humidity, to papers that describe rainforest, mangrove, ocean, and agronomic system development in this carbon dioxide-rich environment. Though several dissertations and many scientific papers used data from the early closure experiments at Biosphere 2, much of the original data has never been analyzed and is unavailable or lost, perhaps due to scientific politics and in-fighting.
The historian of science Rebecca Redier has claimed that because Biosphere 2's creators were perceived as outsiders to academic science, the project was scrutinized but poorly understood in the media, and that this scrutiny ceased after Columbia University assumed management, because it was assumed they were "proper" scientists.
Management by Columbia University
In December 1995, the Biosphere 2 owners transferred management to Columbia University of New York City. Columbia ran Biosphere 2 as a research site and campus until 2003. Subsequently, management reverted to the owners.
In 1996, Columbia University changed the virtually airtight, materially closed structure designed for closed system research, to a "flow-through" system, and halted closed system research. They manipulated carbon dioxide levels for global warming research, and injected desired amounts of carbon dioxide, venting as needed. During Columbia's tenure, students from Columbia and other colleges and universities would often spend one semester at the site.
Research during Columbia's tenure demonstrated the devastating impacts on coral reefs from elevated atmospheric CO2 and acidification that will result from continued global climate change. Frank Press, former president of the National Academy of Sciences, described these interactions between atmosphere and ocean, taking advantage of the highly controllable ocean mesocosm of Biosphere 2, as the "first unequivocal experimental confirmation of the human impact on the planet".
Studies in Biosphere 2's terrestrial biomes showed that a saturation point was reached with elevated CO2 beyond which they are unable to uptake more. The studies' authors noted that the striking differences between the Biosphere 2 rainforest and desert biomes in their whole system responses "illustrates the importance of large-scale experimental research in the study of complex global change issues".
Site sold
In January 2005, Decisions Investments Corporation, owner of Biosphere 2, announced that the project's 1,600-acre (650 ha) campus was for sale. They preferred a research use to be found for the complex but were not excluding buyers with different intentions, such as big universities, churches, resorts, and spas. In June 2007, the site was sold for $50 million to CDO Ranching & Development, L.P. 1,500 houses and a resort hotel were planned, but the main structure was still to be available for research and educational use.
Acquisition by University of Arizona
On June 26, 2007, the University of Arizona announced it would take over research at the Biosphere 2. The announcement ended fears that the structure would be demolished. University officials said private gifts and grants enabled them to cover research and operating costs for three years with the possibility of extending funding for ten years. It was extended for ten years, and engaged in research projects including research into the terrestrial water cycle and how it relates to ecology, atmospheric science, soil geochemistry, and climate change. One of these gifts in 2009 included 470 photovoltaic solar panels added to the site. In June 2011, the university announced that it would assume full ownership of Biosphere 2, effective July 1.
CDO Ranching & Development donated the land, Biosphere buildings and several other support and administrative buildings. In 2011, the Philecology Foundation (a nonprofit research foundation founded by Ed Bass) pledged US$20 million for the ongoing science and operations. In 2017, Ed Bass donated another $30 million to the University of Arizona in support of Biosphere 2, endowing two academic positions and setting up the "Philecology Biospheric Research Endowment Fund".
Science camps are also held on the premises. These have included a week-long 'space camp' for university undergraduates, and overnight camps for school students. In 2011 it was reported that there were an average of 100,000 visitors per year visiting the Biosphere 2 campus.
Later research
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There are many small-scale research projects at Biosphere 2, as well as several large-scale research projects including:
- the Landscape Evolution Observatory (LEO), a project which uses 1,800 sensors to monitor millions of pounds of abiotic volcanic rock to track how this nonliving soil slowly develops over several years into a rich soil which is able to support microbial and vascular plant life. Structurally, this involved building three large steel-framed "hillsides" inside the pre-existing domes as the world’s largest weighing lysimeter, with design and implementation construction constrained by the limited accessibility into the existing structure.
- the Lunar Greenhouse, a second prototype of the Controlled Environment Agriculture Center which seeks to understand how to grow vegetables on the Moon or Mars by developing a bioregenerative life support system which recycles and purifies water through plant transpiration.
- a vertical farming project to be built in Biosphere 2's west lung, in collaboration with the private company Civic Farms, in an effort to develop an indoor plant growth cycle with LED lamps configured to specific wavelengths aimed at increasing water efficiency, producing zero farm runoff, with no pests or pesticides, and zero effect from external weather conditions.
See also
In Spanish: Biosfera 2 para niños
- BIOS-3, a closed ecosystem at the Institute of Biophysics in Krasnoyarsk, Siberia, Russia
- Eden Project
- IBTS Greenhouse
- Institute of Ecotechnics
- Mars analog habitats
- Flashline Mars Arctic Research Station (FMARS)
- Mars Desert Research Station (MDRS)
- MARS-500, ground-based experiment simulating a crewed flight to Mars
- HI-SEAS
- MELiSSA, a closed ecosystem run by the European Space Agency
- Yuegong-1, a closed ecosystem experiment in Beijing, China
