A mapping of martian water sublimation during early northern summer using OMEGA/Mars Express

T. Encrenaz; R. Melchiorri; T. Fouchet; P. Drossart; E. Lellouch; B. Gondet; J. P. Bibring; Y. Langevin; D. Titov; N. Ignatiev; F. Forget

doi:10.1051/0004-6361:200500171

A mapping of martian water sublimation during early northern summer using OMEGA/Mars Express

T. Encrenaz
, R. Melchiorri
, T. Fouchet
, P. Drossart
, E. Lellouch
, B. Gondet
, J. P. Bibring
, Y. Langevin
, D. Titov
, N. Ignatiev
, F. Forget

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

Abstract

The OMEGA imaging spectrometer aboard Mars Express has been used to map the water vapor abundance over the martian surface, from the analysis of the 2.6 μm band of H₂O. As a preliminary result of this study, we present water vapor maps in the northern hemisphere at the time of the northern polar cap sublimation (Ls = 94-112 deg). The maps show a mean H₂O mixing ratio of about 2-3 × 10^-4 at a latitude of 40N, and in the range of 5 × 10^-4-10^-3 at 60N-80N latitudes. The corresponding mean H₂O column densities are about 25 pr-μm at 40N and between 40 and 60 pr-μm at 60N-80N, with uncertainties of about 30 percent. Our results are in agreement with previous results by MAWD/Viking and TES/MGS for latitudes up to 60N, but seem to indicate lower values at high latitude. However they are still globally consistent in view of our error bars.

Original language	English
Pages (from-to)	L9-L12
Journal	Astronomy and Astrophysics
Volume	441
Issue number	3
DOIs	https://doi.org/10.1051/0004-6361:200500171
Publication status	Published - 1 Oct 2005

Keywords

Infrared: solar system
Planets and satellites: Mars

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10.1051/0004-6361:200500171

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title = "A mapping of martian water sublimation during early northern summer using OMEGA/Mars Express",

abstract = "The OMEGA imaging spectrometer aboard Mars Express has been used to map the water vapor abundance over the martian surface, from the analysis of the 2.6 μm band of H2O. As a preliminary result of this study, we present water vapor maps in the northern hemisphere at the time of the northern polar cap sublimation (Ls = 94-112 deg). The maps show a mean H2O mixing ratio of about 2-3 × 10-4 at a latitude of 40N, and in the range of 5 × 10-4-10-3 at 60N-80N latitudes. The corresponding mean H2O column densities are about 25 pr-μm at 40N and between 40 and 60 pr-μm at 60N-80N, with uncertainties of about 30 percent. Our results are in agreement with previous results by MAWD/Viking and TES/MGS for latitudes up to 60N, but seem to indicate lower values at high latitude. However they are still globally consistent in view of our error bars.",

keywords = "Infrared: solar system, Planets and satellites: Mars",

author = "T. Encrenaz and R. Melchiorri and T. Fouchet and P. Drossart and E. Lellouch and B. Gondet and Bibring, \{J. P.\} and Y. Langevin and D. Titov and N. Ignatiev and F. Forget",

year = "2005",

month = oct,

day = "1",

doi = "10.1051/0004-6361:200500171",

language = "English",

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TY - JOUR

T1 - A mapping of martian water sublimation during early northern summer using OMEGA/Mars Express

AU - Encrenaz, T.

AU - Melchiorri, R.

AU - Fouchet, T.

AU - Drossart, P.

AU - Lellouch, E.

AU - Gondet, B.

AU - Bibring, J. P.

AU - Langevin, Y.

AU - Titov, D.

AU - Ignatiev, N.

AU - Forget, F.

PY - 2005/10/1

Y1 - 2005/10/1

N2 - The OMEGA imaging spectrometer aboard Mars Express has been used to map the water vapor abundance over the martian surface, from the analysis of the 2.6 μm band of H2O. As a preliminary result of this study, we present water vapor maps in the northern hemisphere at the time of the northern polar cap sublimation (Ls = 94-112 deg). The maps show a mean H2O mixing ratio of about 2-3 × 10-4 at a latitude of 40N, and in the range of 5 × 10-4-10-3 at 60N-80N latitudes. The corresponding mean H2O column densities are about 25 pr-μm at 40N and between 40 and 60 pr-μm at 60N-80N, with uncertainties of about 30 percent. Our results are in agreement with previous results by MAWD/Viking and TES/MGS for latitudes up to 60N, but seem to indicate lower values at high latitude. However they are still globally consistent in view of our error bars.

AB - The OMEGA imaging spectrometer aboard Mars Express has been used to map the water vapor abundance over the martian surface, from the analysis of the 2.6 μm band of H2O. As a preliminary result of this study, we present water vapor maps in the northern hemisphere at the time of the northern polar cap sublimation (Ls = 94-112 deg). The maps show a mean H2O mixing ratio of about 2-3 × 10-4 at a latitude of 40N, and in the range of 5 × 10-4-10-3 at 60N-80N latitudes. The corresponding mean H2O column densities are about 25 pr-μm at 40N and between 40 and 60 pr-μm at 60N-80N, with uncertainties of about 30 percent. Our results are in agreement with previous results by MAWD/Viking and TES/MGS for latitudes up to 60N, but seem to indicate lower values at high latitude. However they are still globally consistent in view of our error bars.

KW - Infrared: solar system

KW - Planets and satellites: Mars

UR - https://www.scopus.com/pages/publications/26844487805

U2 - 10.1051/0004-6361:200500171

DO - 10.1051/0004-6361:200500171

M3 - Article

AN - SCOPUS:26844487805

SN - 0004-6361

VL - 441

SP - L9-L12

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

IS - 3

ER -

A mapping of martian water sublimation during early northern summer using OMEGA/Mars Express

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Keywords

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