Reference : A warm layer in Venus' cryosphere and high-altitude measurements of HF, HCl, H[SUB]2[/SU...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/29200
A warm layer in Venus' cryosphere and high-altitude measurements of HF, HCl, H[SUB]2[/SUB]O and HDO
English
Bertaux, Jean-Loup [Service d'Aéronomie du CNRS/IPSL, Verrières-le-Buisson 91371, France]
Vandaele, Ann-Carine [Belgian Institute for Space Aeronomy, 3 avenue Circulaire, B-1180 Brussels, Belgium]
Korablev, Oleg [Space Research Institute (IKI), 84/32 Profsoyuznaya, 117810 Moscow, Russia]
Villard, E. [Service d'Aéronomie du CNRS/IPSL, Verrières-le-Buisson 91371, France]
Fedorova, A. [Space Research Institute (IKI), 84/32 Profsoyuznaya, 117810 Moscow, Russia]
Fussen, D. [Belgian Institute for Space Aeronomy, 3 avenue Circulaire, B-1180 Brussels, Belgium]
Quémerais, E. [Service d'Aéronomie du CNRS/IPSL, Verrières-le-Buisson 91371, France]
Belyaev, D. [Space Research Institute (IKI), 84/32 Profsoyuznaya, 117810 Moscow, Russia]
Mahieux, A. [Belgian Institute for Space Aeronomy, 3 avenue Circulaire, B-1180 Brussels, Belgium]
Montmessin, F. [Service d'Aéronomie du CNRS/IPSL, Verrières-le-Buisson 91371, France]
Muller, Christian [Centre Hospitalier Universitaire de Liège - CHU > > Chirurgie abdominale- endocrinienne et de transplantation >]
Neefs, E. [Belgian Institute for Space Aeronomy, 3 avenue Circulaire, B-1180 Brussels, Belgium]
Nevejans, D. [Belgian Institute for Space Aeronomy, 3 avenue Circulaire, B-1180 Brussels, Belgium]
Wilquet, V. [Belgian Institute for Space Aeronomy, 3 avenue Circulaire, B-1180 Brussels, Belgium]
Dubois, Jacques mailto [Université de Liège - ULg > Services généraux (Faculté de philosophie et lettres) > Relations académiques et scientifiques (Philo et lettres) >]
Hauchecorne, A. [Service d'Aéronomie du CNRS/IPSL, Verrières-le-Buisson 91371, France]
Stepanov, A. [Space Research Institute (IKI), 84/32 Profsoyuznaya, 117810 Moscow, Russia]
Vinogradov, I. [Space Research Institute (IKI), 84/32 Profsoyuznaya, 117810 Moscow, Russia]
Rodin, A. [Space Research Institute (IKI), 84/32 Profsoyuznaya, 117810 Moscow, Russia]
Bertaux, Jean-Loup [Service d'Aéronomie du CNRS/IPSL, Verrières-le-Buisson 91371, France.]
Nevejans, D. [Belgian Institute for Space Aeronomy, 3 avenue Circulaire, B-1180 Brussels, Belgium.]
Korablev, Oleg [Space Research Institute (IKI), 84/32 Profsoyuznaya, 117810 Moscow, Russia.]
Montmessin, F. [Service d'Aéronomie du CNRS/IPSL, Verrières-le-Buisson 91371, France.]
Vandaele, Ann-Carine [Belgian Institute for Space Aeronomy, 3 avenue Circulaire, B-1180 Brussels, Belgium.]
Fedorova, A. [Space Research Institute (IKI), 84/32 Profsoyuznaya, 117810 Moscow, Russia.]
Cabane, M. [Service d'Aéronomie du CNRS/IPSL, Verrières-le-Buisson 91371, France.]
Chassefière, E. [Service d'Aéronomie du CNRS/IPSL, Verrières-le-Buisson 91371, France.]
Chaufray, J. Y. [Service d'Aéronomie du CNRS/IPSL, Verrières-le-Buisson 91371, France.]
Dimarellis, E. [Service d'Aéronomie du CNRS/IPSL, Verrières-le-Buisson 91371, France.]
Dubois, Jacques mailto [Université de Liège - ULg > Services généraux (Faculté de philosophie et lettres) > Relations académiques et scientifiques (Philo et lettres) >]
Hauchecorne, A. [Service d'Aéronomie du CNRS/IPSL, Verrières-le-Buisson 91371, France.]
Leblanc, F. [Service d'Aéronomie du CNRS/IPSL, Verrières-le-Buisson 91371, France.]
Lefevre, Florence [Centre Hospitalier Universitaire de Liège - CHU > > Imagerie médicale >]
Rannou, P. [Service d'Aéronomie du CNRS/IPSL, Verrières-le-Buisson 91371, France.]
Quémerais, E. [Service d'Aéronomie du CNRS/IPSL, Verrières-le-Buisson 91371, France.]
Villard, E. [Service d'Aéronomie du CNRS/IPSL, Verrières-le-Buisson 91371, France.]
Fussen, D. [Belgian Institute for Space Aeronomy, 3 avenue Circulaire, B-1180 Brussels, Belgium.]
Muller, Christian [Centre Hospitalier Universitaire de Liège - CHU > > Chirurgie abdominale- endocrinienne et de transplantation >]
Neefs, E. [Belgian Institute for Space Aeronomy, 3 avenue Circulaire, B-1180 Brussels, Belgium.]
van Ransbeeck, E. [Belgian Institute for Space Aeronomy, 3 avenue Circulaire, B-1180 Brussels, Belgium.]
Wilquet, V. [Belgian Institute for Space Aeronomy, 3 avenue Circulaire, B-1180 Brussels, Belgium.]
Rodin, A. [Space Research Institute (IKI), 84/32 Profsoyuznaya, 117810 Moscow, Russia.]
Stepanov, A. [Space Research Institute (IKI), 84/32 Profsoyuznaya, 117810 Moscow, Russia.]
Vinogradov, I. [Space Research Institute (IKI), 84/32 Profsoyuznaya, 117810 Moscow, Russia.]
Zasova, L. [Space Research Institute (IKI), 84/32 Profsoyuznaya, 117810 Moscow, Russia.]
Forget, F. [Laboratoire de Météorologie Dynamique, 4 place Jussieu, 75252 Paris cedex 05, France.]
Lebonnois, S. [Laboratoire de Météorologie Dynamique, 4 place Jussieu, 75252 Paris cedex 05, France.]
Titov, D. [Max-Planck-Institut für Sonnensystemforschung Max-Planck-Strasse 2, D-37191 Katlenburg-Lindau, Germany.]
Rafkin, S. [Southwest Research Institute, Department of Geophysics, Astrophysics and Planetary Science, 1050 Walnut Avenue, Suite 400, Boulder, Colorado 80302-5143, USA.]
Durry, G. [Groupe de Spectrométrie Moléculaire et Atmosphérique, Université de Reims, Champagne-Ardennes B.P. 1039, 51687 Reims cedex, France.]
Gérard, Jean-Claude mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP) >]
Sandel, B. [Lunar and Planetary Laboratory, University of Arizona, 1541 E. University Boulevard, Tucson, Arizona 85721, USA.]
1-Nov-2007
Nature
450
646-649
Yes
International
[en] Venus has thick clouds of H[SUB]2[/SUB]SO[SUB]4[/SUB] aerosol particles extending from altitudes of 40 to 60km. The 60-100km region (the mesosphere) is a transition region between the 4day retrograde superrotation at the top of the thick clouds and the solar-antisolar circulation in the thermosphere (above 100km), which has upwelling over the subsolar point and transport to the nightside. The mesosphere has a light haze of variable optical thickness, with CO, SO[SUB]2[/SUB], HCl, HF, H[SUB]2[/SUB]O and HDO as the most important minor gaseous constituents, but the vertical distribution of the haze and molecules is poorly known because previous descent probes began their measurements at or below 60km. Here we report the detection of an extensive layer of warm air at altitudes 90-120km on the night side that we interpret as the result of adiabatic heating during air subsidence. Such a strong temperature inversion was not expected, because the night side of Venus was otherwise so cold that it was named the `cryosphere' above 100km. We also measured the mesospheric distributions of HF, HCl, H[SUB]2[/SUB]O and HDO. HCl is less abundant than reported 40years ago. HDO/H[SUB]2[/SUB]O is enhanced by a factor of ~2.5 with respect to the lower atmosphere, and there is a general depletion of H[SUB]2[/SUB]O around 80-90km for which we have no explanation.
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/29200
10.1038/nature05974
http://adsabs.harvard.edu/abs/2007Natur.450..646B

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