Universität zu Köln

Scarica, Pietro, Garate-Lopez, Itziar, Lebonnois, Sebastien, Piccioni, Giuseppe ORCID: 0000-0002-7893-6808, Grassi, Davide ORCID: 0000-0003-1653-3066, Migliorini, Alessandra ORCID: 0000-0001-7386-9215 and Tellmann, Silvia (2019). Validation of the IPSL Venus GCM Thermal Structure with Venus Express Data. Atmosphere, 10 (10). BASEL: MDPI. ISSN 2073-4433

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Abstract

General circulation models (GCMs) are valuable instruments to understand the most peculiar features in the atmospheres of planets and the mechanisms behind their dynamics. Venus makes no exception and it has been extensively studied thanks to GCMs. Here we validate the current version of the Institut Pierre Simon Laplace (IPSL) Venus GCM, by means of a comparison between the modelled temperature field and that obtained from data by the Visible and Infrared Thermal Imaging Spectrometer (VIRTIS) and the Venus Express Radio Science Experiment (VeRa) onboard Venus Express. The modelled thermal structure displays an overall good agreement with data, and the cold collar is successfully reproduced at latitudes higher than +/-55 degrees, with an extent and a behavior close to the observed ones. Thermal tides developing in the model appear to be consistent in phase and amplitude with data: diurnal tide dominates at altitudes above 10(2) Pa pressure level and at high-latitudes, while semidiurnal tide dominates between 10(2) and 10(4) Pa, from low to mid-latitudes. The main difference revealed by our analysis is located poleward of 50 degrees, where the model is affected by a second temperature inversion arising at 10(3) Pa. This second inversion, possibly related to the adopted aerosols distribution, is not observed in data.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Scarica, Pietro UNSPECIFIED UNSPECIFIED UNSPECIFIED Garate-Lopez, Itziar UNSPECIFIED UNSPECIFIED UNSPECIFIED Lebonnois, Sebastien UNSPECIFIED UNSPECIFIED UNSPECIFIED Piccioni, Giuseppe UNSPECIFIED orcid.org/0000-0002-7893-6808 UNSPECIFIED Grassi, Davide UNSPECIFIED orcid.org/0000-0003-1653-3066 UNSPECIFIED Migliorini, Alessandra UNSPECIFIED orcid.org/0000-0001-7386-9215 UNSPECIFIED Tellmann, Silvia UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-131846
DOI:	10.3390/atmos10100584
Journal or Publication Title:	Atmosphere
Volume:	10
Number:	10
Date:	2019
Publisher:	MDPI
Place of Publication:	BASEL
ISSN:	2073-4433
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language RADIO OCCULTATION MEASUREMENTS; GENERAL-CIRCULATION MODEL; ATMOSPHERE; VIRTIS; TEMPERATURE; SUPERROTATION; FEATURES; MISSION; VORTEX Multiple languages Meteorology & Atmospheric Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/13184