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13 - Planetary ecosynthesis on Mars: restoration ecology and environmental ethics

from Part III - Future of life

Published online by Cambridge University Press:  29 December 2010

By
Christopher P. McKay
Edited by
Constance M. Bertka
Constance M. Bertka
Affiliation:
AAAS, Washington
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Summary

Introduction

There has been a lively discussion recently about the science and ethics of “terraforming” Mars. The high level of interest is a result of spacecraft discoveries about Mars combined with the realization that humans are effectively warming the Earth and wondering if they can, and should, do the same on Mars. I suggest that terraforming is more appropriately called planetary ecosynthesis, and in this chapter I review the scientific studies of planetary ecosynthesis and the environmental ethics associated with instigating such global change on another planet.

Mars today is a cold, dry, frozen desert world on which not even the most hardy of Earth life could survive. Temperatures average −60°C and the pressure averages 0.6 kPa, over one hundred times less than atmospheric pressure at the surface of the Earth. As a result of the low pressure, and secondarily the low temperature, water is not liquid on the surface of Mars at any location or season. Strong solar ultraviolet radiation reaches the surface of Mars to complete the deadly mix of hostile environmental conditions.

But Mars has not always been this harsh. There is compelling evidence that early in its history Mars had stable liquid water on its surface. Presumably this phase of liquid water was associated with a higher pressure and somewhat warmer atmosphere.

Type
Chapter
Information
Exploring the Origin, Extent, and Future of Life
Philosophical, Ethical and Theological Perspectives
 , pp. 245 - 260
Publisher: Cambridge University Press
Print publication year: 2009

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References

Carr, M. H.. Water on Mars (Oxford: Oxford University Press, 1996).Google Scholar
Carr, M. H. and Malin, M. C.. Meter-scale characteristics of Martian channels and valleys. Icarus, 146 (2000), 366–386.CrossRefGoogle Scholar
McKay, C. P., Toon, O. B., and Kasting, J. F.. Making Mars habitable. Nature, 352 (1991), 489–496.CrossRefGoogle ScholarPubMed
McKay, C. P. and Marinova, M. M.. The physics, biology, and environmental ethics of making Mars habitable, Astrobiology, 1 (2001), 89–109.CrossRefGoogle ScholarPubMed
Sagan, C.. Planetary engineering on Mars. Icarus, 20 (1973), 513–514.CrossRefGoogle Scholar
Burns, J. A. and Harwit, M.. Towards a more habitable Mars – or – the coming Martian Spring. Icarus, 19 (1973), 126–130.CrossRefGoogle Scholar
Averner, M. M. and MacElroy, R. D. (eds.). On the Habitability of Mars (NASA-Ames Research Center, Moffett Field, CA: NASA Special Publication, 1976), p. 414.Google Scholar
McKay, C. P.. Terraforming Mars. Journal of the British Interplanetary Society, 35 (1982), 427–433.Google Scholar
Marinova, M. M., McKay, C. P., and Hashimoto, H.. Radiative-convective model of warming Mars with artificial greenhouse gases. Journal of Geophysical Research, E03002, doi:10.1029/2004JE002306 (2005), p. 110.CrossRef
Squyres, S. W. and Carr, M. H.. Geomorphic evidence for the distribution of ground ice on Mars. Science, 231 (1986), 249–252.CrossRefGoogle ScholarPubMed
Feldman, W. C., Boynton, W. V., Tokar, R. L.et al. Global distribution of neutrons from Mars: results from Mars Odyssey. Science, 297 (2002), 75–78.CrossRefGoogle ScholarPubMed
Picardi, G.et al. Radar soundings of the subsurface of Mars. Science, 310 (2005), 1925–1928.CrossRefGoogle ScholarPubMed
Caldeira, K. and Kasting, J. F.. The life span of the biosphere revisited. Nature, 360 (1992), 721–723.CrossRefGoogle ScholarPubMed
McKay, C. P. and Stoker, C. R.. The early environment and its evolution on Mars: implications for life. Reviews of Geophysics, 27 (1989), 189–214.CrossRefGoogle Scholar
Manning, C. V., McKay, C. P., and Zahnle, K. J.. The nitrogen cycle on Mars: impact decomposition of near-surface nitrates as a source for a nitrogen steady state. Icarus, 197 (2008), 60–64.CrossRef
Lovelock, J. E. and Allaby, M.. The Greening of Mars (New York: Warner Books, Incorporated, 1984).Google Scholar
Fogg, M. J.. Terraforming: Engineering Planetary Environments (Warrendale, PA: SAE International, 1995).Google Scholar
Graham, J. M.. The biological terraforming of Mars: planetary ecosynthesis as ecological succession on a global scale. Astrobiology, 4 (2004), 168–195.CrossRefGoogle ScholarPubMed
Leopold, A.. A Sand County Almanac: With Essays on Conservation from Round River (New York: Ballantine Books, 1970 [1949]).Google Scholar
Ehrenfeld, D. W.. The Arrogance of Humanism (New York: Oxford University Press, 1978).Google Scholar
McKay, C. P.. Does Mars have rights? An approach to the environmental ethics of planetary engineering. In Moral Expertise, ed. MacNiven, D. (New York: Routledge, 1990), pp. 184–197.Google Scholar
Rolston, H.III. The preservation of natural value in the solar system. In Beyond Spaceship Earth: Environmental Ethics and the Solar System, ed. Hargrove, E. C. (San Francisco, CA: Sierra Club Books, 1986), pp. 140–182.Google Scholar
Hargrove, E.. Foundations of Environmental Ethics (Englewood Cliffs, NJ: Prentice-Hall, 1989).Google Scholar
Singer, P.. Practical Ethics (Cambridge: Cambridge University Press, 1979).Google Scholar
Stone, C. D.. Should Trees Have Standing? (Los Altos, CA: William Haufmann, 1974).Google Scholar
Naess, A.. The shallow and the deep, long-range ecology movement: a summary. Inquiry, 16 (1973), 95–100.CrossRefGoogle Scholar
Naess, A.. A defense of the deep ecology movements. Environmental Ethics, 6 (1984), 265–270.CrossRefGoogle Scholar
McKay, C. P.. The search for extraterrestrial biochemistry on Mars and Europa. In Exobiology: Matter, Energy, and Information in the Origin and Evolution of Life in the Universe, eds. Chela-Flores, J. and Raulin, F. (Dordrecht: Kluwer, 1998), pp. 219–227.Google Scholar
Weiss, B. P., Kirschvink, J. L., Baudenbacher, F. J., et al. A low temperature transfer of ALH84001 from Mars to Earth. Science, 290 (2000), 791–795.CrossRefGoogle Scholar
McKay, C. P.. Let's put Martian life first. The Planetary Report, 21 (July/August 2001), 4–5.Google Scholar
McKay, C. P.. Hard life for microbes and humans on the Red Planet. Ad Astra, 19(3) (Summer 2007), 30–31.Google Scholar
McKay, C. P.. Biologically reversible exploration. Science, 323 (2009), 718.CrossRefGoogle ScholarPubMed
McKay, C. P.. Exobiology and future Mars missions: the search for Mars' earliest biosphere. Advances in Space Research, 6(12) (1986), 269–285.CrossRefGoogle ScholarPubMed
McKay, C. P.. The search for life on Mars. Origins of Life and Evolution of the Biosphere, 27 (1997), 263–289.CrossRefGoogle ScholarPubMed
Manning, C. V., McKay, C. P., and Zahnle, K. J.. Thick and thin models of the evolution of carbon dioxide on Mars. Icarus, 180 (2006), 38–59.CrossRefGoogle Scholar
Carlsson, E.et al. Mass composition of the escaping plasma at Mars. Icarus, 182 (2006), 320–328.CrossRefGoogle Scholar

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