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A dynamic upper atmosphere of Venus as revealed by VIRTIS on Venus Express

Drossart, P. and Piccioni, G. and Gerard, M. and Sanchez-Lavega, A. and Lopez-Valverde, M. A. and Hueso, R. and Taylor, F.W. and Zasova, L. and Adriani, A. and Lebonnois, S. and Coradini, A. and Bezard, B. and Angrilli, F. and Arnold, G. and Baines, K.H. and Bellucci, G. and Benkhoff, J. and Bibring, J.P. and Blanco, A. and Blecka, M. I. and Carlson, R. W. and Di Lellis, A. and Encrenaz, T. and Erard, S. and Fonti, S. and Formisano, V. and Fouchet, T. and Garcia, R. and Haus, R. and Helbert, J. and Ignatiev, N. I. and Irwin, P.G.J. and Langevin, Y. and Luz, D. and Marinangeli, L. and Orofino, V. and Rodin, A.V. and Roos-Serote, M.C. and Saggin, B. and Stam, D.M. and Titov, D. and Visconti, G. and Zambelli, M. and Tsang, C. and et.al., (2007) A dynamic upper atmosphere of Venus as revealed by VIRTIS on Venus Express. Nature (450), pp. 641-645. DOI: 10.1038/nature06140

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Abstract

The upper atmosphere of a planet is a transition region in which energy is transferred between the deeper atmosphere and outer space. Molecular emissions from the upper atmosphere (90–120 km altitude) of Venus can be used to investigate the energetics and to trace the circulation of this hitherto little-studied region. Previous spacecraft1 and ground-based2, 3, 4 observations of infrared emission from CO2, O2 and NO have established that photochemical and dynamic activity controls the structure of the upper atmosphere of Venus. These data, however, have left unresolved the precise altitude of the emission1 owing to a lack of data and of an adequate observing geometry5, 6. Here we report measurements of day-side CO2 non-local thermodynamic equilibrium emission at 4.3 microm, extending from 90 to 120 km altitude, and of night-side O2 emission extending from 95 to 100 km. The CO2 emission peak occurs at approx115 km and varies with solar zenith angle over a range of approx10 km. This confirms previous modelling7, and permits the beginning of a systematic study of the variability of the emission. The O2 peak emission happens at 96 km plusminus 1 km, which is consistent with three-body recombination of oxygen atoms transported from the day side by a global thermospheric sub-solar to anti-solar circulation, as previously predicted

Item URL in elib:https://elib.dlr.de/52163/
Document Type:Article
Title:A dynamic upper atmosphere of Venus as revealed by VIRTIS on Venus Express
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Drossart, P.LESIAUNSPECIFIED
Piccioni, G.INAF-IASFUNSPECIFIED
Gerard, M.LPAP-Université de LiègeUNSPECIFIED
Sanchez-Lavega, A.Universidad del Pais Vasco AldaUNSPECIFIED
Lopez-Valverde, M. A.CSICUNSPECIFIED
Hueso, R.Universidad del Pais Vasco AldaUNSPECIFIED
Taylor, F.W.University of OxfordUNSPECIFIED
Zasova, L.IKIUNSPECIFIED
Adriani, A.INAF-IFSIUNSPECIFIED
Lebonnois, S.Laboratoire de Meteorologie DynamiqueUNSPECIFIED
Coradini, A.INAF-IFSIUNSPECIFIED
Bezard, B.LESIAUNSPECIFIED
Angrilli, F.CISASUNSPECIFIED
Arnold, G.UNSPECIFIEDUNSPECIFIED
Baines, K.H.Jet Propulsion LboratoryUNSPECIFIED
Bellucci, G.INAF-IFSIUNSPECIFIED
Benkhoff, J.UNSPECIFIEDUNSPECIFIED
Bibring, J.P.Universite Paris-SudUNSPECIFIED
Blanco, A.Universita degli Studi di LecceUNSPECIFIED
Blecka, M. I.Space Research Centre of Polish Academy of ScienceUNSPECIFIED
Carlson, R. W.Jet Propulsion LaboratoryUNSPECIFIED
Di Lellis, A.AMDLSPACE s.r.l.UNSPECIFIED
Encrenaz, T.LESIAUNSPECIFIED
Erard, S.LESIAUNSPECIFIED
Fonti, S.Universita degli Studi di LecceUNSPECIFIED
Formisano, V.INAF-IFSIUNSPECIFIED
Fouchet, T.LESIAUNSPECIFIED
Garcia, R.Institute de Physique du Globe de ParisUNSPECIFIED
Haus, R.UNSPECIFIEDUNSPECIFIED
Helbert, J.UNSPECIFIEDUNSPECIFIED
Ignatiev, N. I.IKIUNSPECIFIED
Irwin, P.G.J.University of OxfordUNSPECIFIED
Langevin, Y.Institut d`Astrophysique SpatialeUNSPECIFIED
Luz, D.Observatorio Astronomico de LisboaUNSPECIFIED
Marinangeli, L.Universita d`AnnunzioUNSPECIFIED
Orofino, V.Universita degli Studi di LecceUNSPECIFIED
Rodin, A.V.IKIUNSPECIFIED
Roos-Serote, M.C.Observatorio Astronomico de LisboaUNSPECIFIED
Saggin, B.Politecnico di MilanoUNSPECIFIED
Stam, D.M.University of AmsterdamUNSPECIFIED
Titov, D.Max-Planck-Inst. for AeronomyUNSPECIFIED
Visconti, G.Universita de L'AquilaUNSPECIFIED
Zambelli, M.INAF-IASFUNSPECIFIED
Tsang, C.Clarendon Laboratory OxfordUNSPECIFIED
et.al., UNSPECIFIEDUNSPECIFIED
Date:2007
Journal or Publication Title:Nature
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:Yes
DOI :10.1038/nature06140
Page Range:pp. 641-645
Editors:
EditorsEmail
Macmilan Publisher Ltd, UNSPECIFIED
Series Name:Letter of Nature
Status:Published
Keywords:Venus, Venus Express, VIRTIS
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Entwicklung und Erprobung von Verfahren zur Gewässerfernerkundung (old)
Location: Berlin-Adlershof
Institutes and Institutions:Remote Sensing Technology Institute > Marine Remote Sensing
Deposited By:INVALID USER
Deposited On:13 Dec 2007
Last Modified:15 Jan 2010 02:01

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