RETRIEVAL OF ATMOSPHERIC TEMPERATURES IN THE MARTIAN PLANETARY BOUNDARY-LAYER USING UPWARD-LOOKING INFRARED-SPECTRA

Citation
Md. Smith et al., RETRIEVAL OF ATMOSPHERIC TEMPERATURES IN THE MARTIAN PLANETARY BOUNDARY-LAYER USING UPWARD-LOOKING INFRARED-SPECTRA, Icarus, 124(2), 1996, pp. 586-597
Citations number
35
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Astronomy & Astrophysics
Journal title
IcarusACNP
ISSN journal
0019-1035
Volume
124
Issue
2
Year of publication
1996
Pages
586 - 597
Database
ISI
SICI code
0019-1035(1996)124:2<586:ROATIT>2.0.ZU;2-C
Abstract
We present an algorithm for the retrieval of temperature in the planet ary boundary layer (lowest few kilometers) of the martian atmosphere u sing upward-looking infrared spectra from a Mars lander. Temperature p rofiles retrieved from an orbiting or passing spacecraft do not have a dequate vertical resolution to provide significant information within the planetary boundary layer. By using spectra taken from a surface la nder looking upward toward zenith, and by transforming to a vertical c oordinate that ''stretches out'' the atmosphere just above the surface where the contribution to the observed radiation peaks, we find that an efficient algorithm can be formulated with adequate vertical resolu tion to successfully retrieve temperature profiles that exhibit the ma jor features of the diurnal cycle of planetary boundary layer temperat ures. We expect that this technique can be extended to simultaneously retrieve the opacity, and possibly the scattering properties, of atmos pheric aerosols as well. Although no upward-looking martian infrared s pectra yet exist, demonstration of the abilities of a lander-based inf rared spectrometer is important for the planning of future missions to Mars. (C) 1996 Academic Press, Inc.