ISO Observations of Mars: An Estimate of the Water Vapor Vertical Distribution and the Surface Emissivity

M. J. Burgdorf; Th Encrenaz; E. Lellouch; H. Feuchtgruber; G. R. Davis; B. M. Swinyard; Th De Graauw; P. W. Morris; S. D. Sidher; M. J. Griffin; F. Forget; T. L. Lim

doi:10.1006/icar.2000.6338

ISO Observations of Mars: An Estimate of the Water Vapor Vertical Distribution and the Surface Emissivity

M. J. Burgdorf
, Th Encrenaz
, E. Lellouch
, H. Feuchtgruber
, G. R. Davis
, B. M. Swinyard
, Th De Graauw
, P. W. Morris
, S. D. Sidher
, M. J. Griffin
, F. Forget
, T. L. Lim

Research output: Contribution to journal › Article › peer-review

Abstract

Infrared spectra of Mars were taken with the two complementary spectrometers onboard the European Space Agency's Infrared Space Observatory (ISO), in both moderate- and high-resolution mode. From the strengths of the observed water lines we derived information about the vertical distribution of water vapor and on the emissivity of the dust/surface system in the infrared. Assuming atmospheric and surface temperatures derived from the European Martian Climate Database with a slight adjustment to the observed 15-μm CO₂ band, the ISO data are consistent with an H₂O mixing ratio of (3±1)×10^-4 at the surface, a saturation level at 13±2 km, and a total column density of 12±3.5 pr-μm. The mean disk emissivity is found to be close to 1.0 at 6 μm and 0.92±0.02 at 40 μm. At longer wavelengths the emissivity decreases from a value of 0.97±0.03 at 50μm to 0.92±0.03 at 180 μm.

Original language	English
Pages (from-to)	79-90
Number of pages	12
Journal	Icarus
Volume	145
Issue number	1
DOIs	https://doi.org/10.1006/icar.2000.6338
Publication status	Published - 1 May 2000

Keywords

Atmosphere
Infrared observations
Mars
Spectroscopy
Surface

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1006/icar.2000.6338

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@article{fe46e80c86e646f6b2c1812f38977e95,

title = "ISO Observations of Mars: An Estimate of the Water Vapor Vertical Distribution and the Surface Emissivity",

abstract = "Infrared spectra of Mars were taken with the two complementary spectrometers onboard the European Space Agency's Infrared Space Observatory (ISO), in both moderate- and high-resolution mode. From the strengths of the observed water lines we derived information about the vertical distribution of water vapor and on the emissivity of the dust/surface system in the infrared. Assuming atmospheric and surface temperatures derived from the European Martian Climate Database with a slight adjustment to the observed 15-μm CO2 band, the ISO data are consistent with an H2O mixing ratio of (3±1)×10-4 at the surface, a saturation level at 13±2 km, and a total column density of 12±3.5 pr-μm. The mean disk emissivity is found to be close to 1.0 at 6 μm and 0.92±0.02 at 40 μm. At longer wavelengths the emissivity decreases from a value of 0.97±0.03 at 50μm to 0.92±0.03 at 180 μm.",

keywords = "Atmosphere, Infrared observations, Mars, Spectroscopy, Surface",

author = "Burgdorf, \{M. J.\} and Th Encrenaz and E. Lellouch and H. Feuchtgruber and Davis, \{G. R.\} and Swinyard, \{B. M.\} and \{De Graauw\}, Th and Morris, \{P. W.\} and Sidher, \{S. D.\} and Griffin, \{M. J.\} and F. Forget and Lim, \{T. L.\}",

year = "2000",

month = may,

day = "1",

doi = "10.1006/icar.2000.6338",

language = "English",

volume = "145",

pages = "79--90",

journal = "Icarus",

issn = "0019-1035",

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}

TY - JOUR

T1 - ISO Observations of Mars

T2 - An Estimate of the Water Vapor Vertical Distribution and the Surface Emissivity

AU - Burgdorf, M. J.

AU - Encrenaz, Th

AU - Lellouch, E.

AU - Feuchtgruber, H.

AU - Davis, G. R.

AU - Swinyard, B. M.

AU - De Graauw, Th

AU - Morris, P. W.

AU - Sidher, S. D.

AU - Griffin, M. J.

AU - Forget, F.

AU - Lim, T. L.

PY - 2000/5/1

Y1 - 2000/5/1

N2 - Infrared spectra of Mars were taken with the two complementary spectrometers onboard the European Space Agency's Infrared Space Observatory (ISO), in both moderate- and high-resolution mode. From the strengths of the observed water lines we derived information about the vertical distribution of water vapor and on the emissivity of the dust/surface system in the infrared. Assuming atmospheric and surface temperatures derived from the European Martian Climate Database with a slight adjustment to the observed 15-μm CO2 band, the ISO data are consistent with an H2O mixing ratio of (3±1)×10-4 at the surface, a saturation level at 13±2 km, and a total column density of 12±3.5 pr-μm. The mean disk emissivity is found to be close to 1.0 at 6 μm and 0.92±0.02 at 40 μm. At longer wavelengths the emissivity decreases from a value of 0.97±0.03 at 50μm to 0.92±0.03 at 180 μm.

AB - Infrared spectra of Mars were taken with the two complementary spectrometers onboard the European Space Agency's Infrared Space Observatory (ISO), in both moderate- and high-resolution mode. From the strengths of the observed water lines we derived information about the vertical distribution of water vapor and on the emissivity of the dust/surface system in the infrared. Assuming atmospheric and surface temperatures derived from the European Martian Climate Database with a slight adjustment to the observed 15-μm CO2 band, the ISO data are consistent with an H2O mixing ratio of (3±1)×10-4 at the surface, a saturation level at 13±2 km, and a total column density of 12±3.5 pr-μm. The mean disk emissivity is found to be close to 1.0 at 6 μm and 0.92±0.02 at 40 μm. At longer wavelengths the emissivity decreases from a value of 0.97±0.03 at 50μm to 0.92±0.03 at 180 μm.

KW - Atmosphere

KW - Infrared observations

KW - Mars

KW - Spectroscopy

KW - Surface

U2 - 10.1006/icar.2000.6338

DO - 10.1006/icar.2000.6338

M3 - Article

AN - SCOPUS:0003198003

SN - 0019-1035

VL - 145

SP - 79

EP - 90

JO - Icarus

JF - Icarus

IS - 1

ER -

ISO Observations of Mars: An Estimate of the Water Vapor Vertical Distribution and the Surface Emissivity

Abstract

Keywords

UN SDGs

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