Ground-Based Observations of the Martian Atmosphere in Support of Space Missions

Details Ground-Based Observations of the Martian Atmosphere in Support of Space Missions Ground-Based Observations of the Martian Atmosphere in Support of Space Missions

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009em%26p..105..127e&link_type=abstract

Earth, Moon, and Planets, Volume 105, Issue 2-4, pp. 127-134

Computer Science

1

Mars, Mars Atmosphere, Planetary Atmospheres, Infrared Spectroscopy, Millimeter Spectroscopy, Heterodyne Spectroscopy

Scientific paper

Although Mars is a favored target for planetary exploration, there is still a need for complementary ground-based observing programs of the Martian atmosphere, and this need will remain in the future. Indeed, as the atmosphere is very tenuous (less than 0.01 bar at the surface), the lines are very narrow and a high spectral resolving power (above 104) is required over large spectral intervals. In addition, ground-based observations of Mars allow the instantaneous mapping of the whole planet, and thus the study of diurnal effects, which cannot be achieved from an orbiter. Recent ground-based achievements about the Martian atmospheric science include the first detection of H2O2 in the submillimeter range, the measurement of winds from CO millimetric transitions, the first detection of CH4 and the O3, H2O2, H2O, and CH4 mapping in the infrared. With an ELT, it will be possible to study at high spatial resolution transient atmospheric phenomena and to search for traces of minor constituents with unprecedented sensitivity. With ALMA, it will be also possible to search for minor species and to map the mesospheric winds for better constraining the climate models.

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