| 6180 |
Creator |
96fdb8f74aad60e762b1aef18d80ab45 |
| 6180 |
Creator |
970b917038a425943ae594e993a37e66 |
| 6180 |
Date |
2006-10-29 |
| 6180 |
Is Part Of |
repository |
| 6180 |
Is Part Of |
p14712970 |
| 6180 |
abstract |
One of the goals of the present Martian exploration is to search for evidence of extinct
(or even extant) life. This could be redefined as a search for carbon. The carbon
cycle (or, more properly, cycles) on Earth is a complex interaction among three reservoirs:
the atmosphere; the hydrosphere; and the lithosphere. Superimposed on this is the
biosphere, and its presence influences the fixing and release of carbon in these reservoirs
over different time-scales. The overall carbon balance is kept at equilibrium on the
surface by a combination of tectonic processes (which bury carbon), volcanism (which
releases it) and biology (which mediates it). In contrast to Earth, Mars presently
has no active tectonic system; neither does it possess a significant biosphere. However,
these observations might not necessarily have held in the past. By looking at how
Earth's carbon cycles have changed with time, as both the Earth's tectonic structure
and a more sophisticated biology have evolved, and also by constructing a carbon cycle
for Mars based on the carbon chemistry of Martian meteorites, we investigate whether
or not there is evidence for a Martian biosphere. |
| 6180 |
authorList |
authors |
| 6180 |
issue |
1474 |
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status |
peerReviewed |
| 6180 |
volume |
361 |
| 6180 |
type |
AcademicArticle |
| 6180 |
type |
Article |
| 6180 |
label |
Grady, Monica M. and Wright, Ian (2006). The carbon cycle on early Earth—and
on Mars? Philosophical Transactions of the Royal Society B: Biological Sciences,
361(1474) 1703 -1713. |
| 6180 |
label |
Grady, Monica M. and Wright, Ian (2006). The carbon cycle on early Earth—and on
Mars? Philosophical Transactions of the Royal Society B: Biological Sciences, 361(1474)
1703 -1713. |
| 6180 |
Title |
The carbon cycle on early Earth—and on Mars? |
| 6180 |
in dataset |
oro |