Latitudinal and temporal variability of Venus clouds and hazes observed by polarimetry with SPICAV-IR

Loïc Rossi 1 Emmanuel Marcq 2 Franck Montmessin 2 Jean-Loup Bertaux 2 Anna Fedorova 3, 4 Oleg Korablev 4, 3 Daphne Stam 1
1 Faculty of Aerospace Engineering [Delft]
2 IMPEC - LATMOS
LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales
3 MIPT - Moscow Institute of Physics and Technology [Moscow]
4 IKI - Space Research Institute of the Russian Academy of Sciences
Abstract : The study of Venus’ cloud layers is important in order to understand the structure, radiative balance and dynamics of the Venusian atmosphere. Polarization measurements have given important constraints for the determination of the constituents of the clouds and haze. From ground based observations Hansen and Hovenier[1], using a ra- diative transfer model including polarization, found that the main cloud layers between 50 and 70 km consist of r ≃ 1 μm radius spherical droplets of a H2SO4 -H2O solution. In the early 1980s, Kawabata[2] used the polar- ization data from the OCPP instrument on the spacecraft Pioneer Venus to constrain the properties of the overly- ing haze. They found that the haze layer is composed of smaller particles with r ≃ 0.25 μm and similar re- fractive indices. Our work reproduces the method used by Hansen and Kawabata[1, 2]. We applied a radia- tive transfer model with polarization on the data of the SPICAV-IR instrument on-board ESA’s Venus Express. Our aim is to better constrain haze and cloud particles at the top of Venus’s clouds, as well as their spatial and temporal variability.
Type de document :
Communication dans un congrès
International Venus Conference 2016, Apr 2016, Oxford, United Kingdom. International Venus Conference 2016
Liste complète des métadonnées

Littérature citée [7 références]  Voir  Masquer  Télécharger
https://hal-insu.archives-ouvertes.fr/insu-01297473
Contributeur : Catherine Cardon <>
Soumis le : lundi 4 avril 2016 - 13:37:10
Dernière modification le : mercredi 19 septembre 2018 - 01:26:32
Document(s) archivé(s) le : lundi 14 novembre 2016 - 16:08:55

Fichier

Rossi.pdf
Fichiers produits par l'(les) auteur(s)

Identifiants

  • HAL Id : insu-01297473, version 1

Collections

INSU | UPMC | UVSQ | LATMOS | UNIV-PARIS-SACLAY

Citation

Loïc Rossi, Emmanuel Marcq, Franck Montmessin, Jean-Loup Bertaux, Anna Fedorova, et al.. Latitudinal and temporal variability of Venus clouds and hazes observed by polarimetry with SPICAV-IR. International Venus Conference 2016, Apr 2016, Oxford, United Kingdom. International Venus Conference 2016. 〈insu-01297473〉

Exporter

BibTeX TEI DC DCterms EndNote

Partager

Métriques

Consultations de la notice

218

Téléchargements de fichiers

64

Contact

support.ccsd.cnrs.fr
hal.support@ccsd.cnrs.fr
Logo CCSD