New problems to be solved for establishing closed life support system

Nitta, Keiji

doi:10.1016/s0273-1177(02)00660-9

Advances in Space Research

2003

DOI: 10.1016/s0273-1177(02)00660-9

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New problems to be solved for establishing closed life support system

Keiji Nitta

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Cited by 8 publications

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“…The most frequent outcome of longer term closure is a collapse of the ecological system due to imbalances in the autotrophic and heterotrophic gas fluxes (O 2 vs. CO 2 ) and/or the nutrient release and uptake cycles (waste decomposition vs. nutrient absorption) (Nelson et al 2003b;Nitta 2003). The Biosphere 2 project drew attention to the fact that species diversity alone is not sufficient to induce a homeostatic and self-regulating (i.e.…”

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confidence: 99%

The role of closed ecological systems in carbon cycle modelling

2011

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Acquiring a mechanistic understanding of the role of biotic feedbacks for the links between atmospheric CO 2 concentrations and temperature is essential for trustworthy climate predictions. Currently, computer-based simulations are the only available tool to estimate the global impact of biotic feedbacks on future atmospheric CO 2 and temperatures. Here we propose an alternative and complementary approach by using materially closed, energetically open analogue/physical models of the carbon cycle. We argue that there is unexplored potential in using a materially closed approach to improve our understanding of the magnitude and direction of many biotic carbon feedbacks and that recent technological advances make this feasible. We also suggest how such systems could be designed and discuss the advantages and limitations of establishing physical models of the global carbon cycle. BackgroundAs a species we are effectively "trapped" on a planet which, for all practical purposes, is materially closed, but energetically open (Fuller and Snyder 1969). With the exception of the cosmic debris that falls into the atmosphere and the negligible quantities of matter in satellites and the light gases that escape into outer space, the Earth is materially closed (Morowitz et al. 2005). We have no real choice other than to survive within this closed system and, more critically, to ensure that it remains sustainable. From cells to ecosystems and through to biomes, there is no other biological or ecological scale besides the Biosphere (Vernadsky 1926) at which life is able to persist in the absence of significant matter Climatic Change (2012) 112:709-716

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The role of closed ecological systems in carbon cycle modelling

2011

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The conceptual design of a hybrid life support system based on the evaluation and comparison of terrestrial testbeds

Czupalla

Horneck

Blome

2005

Advances in Space Research

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Gas exchange between humans and multibiological life support system

Tong

Liu

et al. 2011

Ecological Engineering

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New problems to be solved for establishing closed life support system

Cited by 8 publications

References 5 publications

The role of closed ecological systems in carbon cycle modelling

The role of closed ecological systems in carbon cycle modelling

The conceptual design of a hybrid life support system based on the evaluation and comparison of terrestrial testbeds

Gas exchange between humans and multibiological life support system

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