Probing the Martian atmosphere with MAVEN/IUVS stellar occultations

H. Gröller; R. V. Yelle; T. T. Koskinen; F. Montmessin; G. Lacombe; N. M. Schneider; J. Deighan; A. I.F. Stewart; S. K. Jain; M. S. Chaffin; M. M.J. Crismani; A. Stiepen; F. Lefèvre; W. E. McClintock; J. T. Clarke; G. M. Holsclaw; P. R. Mahaffy; S. W. Bougher; B. M. Jakosky

doi:10.1002/2015GL065294

Probing the Martian atmosphere with MAVEN/IUVS stellar occultations

H. Gröller, R. V. Yelle, T. T. Koskinen, F. Montmessin, G. Lacombe, N. M. Schneider, J. Deighan, A. I.F. Stewart, S. K. Jain, M. S. Chaffin, M. M.J. Crismani, A. Stiepen, F. Lefèvre, W. E. McClintock, J. T. Clarke, G. M. Holsclaw, P. R. Mahaffy, S. W. Bougher, B. M. Jakosky

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25 Scopus citations

Abstract

The first campaign of stellar occultations with the Imaging Ultraviolet Spectrograph (IUVS) instrument on board of Mars Atmosphere and Volatile EvolutioN (MAVEN) mission was executed between 24 and 26 March 2015. From this campaign 13 occultations are used to retrieve CO₂ and O₂ number densities in the altitude range between 100 and 150 km. Observations probe primarily the low-latitude regions on the nightside of the planet, just past the dawn and dusk terminator. Calculation of temperature from the CO₂ density profiles reveals that the lower thermosphere is significantly cooler than predicted by the models in the Mars Climate Database. A systematically cold layer with temperatures of 105-120 K is seen in the occultations at a pressure level around 7 × 10^-6 Pa.

Original language	English (US)
Pages (from-to)	9064-9070
Number of pages	7
Journal	Geophysical Research Letters
Volume	42
Issue number	21
DOIs	https://doi.org/10.1002/2015GL065294
State	Published - Nov 16 2015

Keywords

Atmosphere
CO and O Density
IUVS/MAVEN
Mars
Stellar Occultation
Temperature

ASJC Scopus subject areas

Geophysics
General Earth and Planetary Sciences

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10.1002/2015GL065294

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Gröller, H., Yelle, R. V., Koskinen, T. T., Montmessin, F., Lacombe, G., Schneider, N. M., Deighan, J., Stewart, A. I. F., Jain, S. K., Chaffin, M. S., Crismani, M. M. J., Stiepen, A., Lefèvre, F., McClintock, W. E., Clarke, J. T., Holsclaw, G. M., Mahaffy, P. R., Bougher, S. W., & Jakosky, B. M. (2015). Probing the Martian atmosphere with MAVEN/IUVS stellar occultations. Geophysical Research Letters, 42(21), 9064-9070. https://doi.org/10.1002/2015GL065294

Gröller, H, Yelle, RV , Koskinen, TT, Montmessin, F, Lacombe, G, Schneider, NM, Deighan, J, Stewart, AIF, Jain, SK, Chaffin, MS, Crismani, MMJ, Stiepen, A, Lefèvre, F, McClintock, WE, Clarke, JT, Holsclaw, GM, Mahaffy, PR, Bougher, SW & Jakosky, BM 2015, 'Probing the Martian atmosphere with MAVEN/IUVS stellar occultations', Geophysical Research Letters, vol. 42, no. 21, pp. 9064-9070. https://doi.org/10.1002/2015GL065294

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title = "Probing the Martian atmosphere with MAVEN/IUVS stellar occultations",

abstract = "The first campaign of stellar occultations with the Imaging Ultraviolet Spectrograph (IUVS) instrument on board of Mars Atmosphere and Volatile EvolutioN (MAVEN) mission was executed between 24 and 26 March 2015. From this campaign 13 occultations are used to retrieve CO2 and O2 number densities in the altitude range between 100 and 150 km. Observations probe primarily the low-latitude regions on the nightside of the planet, just past the dawn and dusk terminator. Calculation of temperature from the CO2 density profiles reveals that the lower thermosphere is significantly cooler than predicted by the models in the Mars Climate Database. A systematically cold layer with temperatures of 105-120 K is seen in the occultations at a pressure level around 7 × 10-6 Pa.",

keywords = "Atmosphere, CO and O Density, IUVS/MAVEN, Mars, Stellar Occultation, Temperature",

author = "H. Gr{\"o}ller and Yelle, {R. V.} and Koskinen, {T. T.} and F. Montmessin and G. Lacombe and Schneider, {N. M.} and J. Deighan and Stewart, {A. I.F.} and Jain, {S. K.} and Chaffin, {M. S.} and Crismani, {M. M.J.} and A. Stiepen and F. Lef{\`e}vre and McClintock, {W. E.} and Clarke, {J. T.} and Holsclaw, {G. M.} and Mahaffy, {P. R.} and Bougher, {S. W.} and Jakosky, {B. M.}",

year = "2015",

month = nov,

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doi = "10.1002/2015GL065294",

language = "English (US)",

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T1 - Probing the Martian atmosphere with MAVEN/IUVS stellar occultations

AU - Gröller, H.

AU - Yelle, R. V.

AU - Koskinen, T. T.

AU - Montmessin, F.

AU - Lacombe, G.

AU - Schneider, N. M.

AU - Deighan, J.

AU - Stewart, A. I.F.

AU - Jain, S. K.

AU - Chaffin, M. S.

AU - Crismani, M. M.J.

AU - Stiepen, A.

AU - Lefèvre, F.

AU - McClintock, W. E.

AU - Clarke, J. T.

AU - Holsclaw, G. M.

AU - Mahaffy, P. R.

AU - Bougher, S. W.

AU - Jakosky, B. M.

PY - 2015/11/16

Y1 - 2015/11/16

N2 - The first campaign of stellar occultations with the Imaging Ultraviolet Spectrograph (IUVS) instrument on board of Mars Atmosphere and Volatile EvolutioN (MAVEN) mission was executed between 24 and 26 March 2015. From this campaign 13 occultations are used to retrieve CO2 and O2 number densities in the altitude range between 100 and 150 km. Observations probe primarily the low-latitude regions on the nightside of the planet, just past the dawn and dusk terminator. Calculation of temperature from the CO2 density profiles reveals that the lower thermosphere is significantly cooler than predicted by the models in the Mars Climate Database. A systematically cold layer with temperatures of 105-120 K is seen in the occultations at a pressure level around 7 × 10-6 Pa.

AB - The first campaign of stellar occultations with the Imaging Ultraviolet Spectrograph (IUVS) instrument on board of Mars Atmosphere and Volatile EvolutioN (MAVEN) mission was executed between 24 and 26 March 2015. From this campaign 13 occultations are used to retrieve CO2 and O2 number densities in the altitude range between 100 and 150 km. Observations probe primarily the low-latitude regions on the nightside of the planet, just past the dawn and dusk terminator. Calculation of temperature from the CO2 density profiles reveals that the lower thermosphere is significantly cooler than predicted by the models in the Mars Climate Database. A systematically cold layer with temperatures of 105-120 K is seen in the occultations at a pressure level around 7 × 10-6 Pa.

KW - Atmosphere

KW - CO and O Density

KW - IUVS/MAVEN

KW - Mars

KW - Stellar Occultation

KW - Temperature

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JO - Geophysical Research Letters

JF - Geophysical Research Letters

IS - 21

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Probing the Martian atmosphere with MAVEN/IUVS stellar occultations

Abstract

Keywords

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