Universität zu Köln

Ando, Hiroki ORCID: 0000-0001-5088-6186, Takaya, Koutarou, Takagi, Masahiro ORCID: 0000-0002-4629-6279, Sugimoto, Norihiko ORCID: 0000-0002-5135-7179, Imamura, Takeshi, Sagawa, Hideo, Tellmann, Silvia, Paetzold, Martin, Matsuda, Yoshihisa, Haeusler, Bernd, Limaye, Sanjay, Choudhary, Raj Kumar and Antonita, Maria (2022). Dynamical Effect on Static Stability of the Venus Atmosphere Simulated Using a General Circulation Model: A Comparison With Radio Occultation Measurements. J. Geophys. Res.-Planets, 127 (3). WASHINGTON: AMER GEOPHYSICAL UNION. ISSN 2169-9100

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Abstract

Distributions of temperature and static stability in the Venus atmosphere consistent with recent radio occultation measurements are reproduced using a general circulation model. A low-stability layer is maintained at low- and mid-latitudes at 50-60 km altitude and is sandwiched by high- and moderate-stability layers extending above 60 and below 50 km, respectively. In the polar region, the low-stability layer is located at 46-63 km altitude and the relatively low-stability layer is also found at 40-46 km altitude. To investigate how these thermal structures form, we examine the dynamical effects of the atmospheric motions on the static stability below 65 km altitude. The results show that the heat transports due to the mean meridional circulation and disturbances are important in low-latitudes. The mid- and high-latitudes above similar to 47 km are destabilized by radiative processes and stabilized by the disturbances, which are mainly associated with baroclinic Rossby-type waves. Below similar to 47 km altitude, the polar region is destabilized by the dynamical processes which induce the appreciable equatorward heat transport, which might be related to Rossby waves in the sub-cloud region, although the suppression of convective adjustment at cloud heights leads to stabilization at 43-47 km.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Ando, Hiroki UNSPECIFIED orcid.org/0000-0001-5088-6186 UNSPECIFIED Takaya, Koutarou UNSPECIFIED UNSPECIFIED UNSPECIFIED Takagi, Masahiro UNSPECIFIED orcid.org/0000-0002-4629-6279 UNSPECIFIED Sugimoto, Norihiko UNSPECIFIED orcid.org/0000-0002-5135-7179 UNSPECIFIED Imamura, Takeshi UNSPECIFIED UNSPECIFIED UNSPECIFIED Sagawa, Hideo UNSPECIFIED UNSPECIFIED UNSPECIFIED Tellmann, Silvia UNSPECIFIED UNSPECIFIED UNSPECIFIED Paetzold, Martin UNSPECIFIED UNSPECIFIED UNSPECIFIED Matsuda, Yoshihisa UNSPECIFIED UNSPECIFIED UNSPECIFIED Haeusler, Bernd UNSPECIFIED UNSPECIFIED UNSPECIFIED Limaye, Sanjay UNSPECIFIED UNSPECIFIED UNSPECIFIED Choudhary, Raj Kumar UNSPECIFIED UNSPECIFIED UNSPECIFIED Antonita, Maria UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-691425
DOI:	10.1029/2021JE006957
Journal or Publication Title:	J. Geophys. Res.-Planets
Volume:	127
Number:	3
Date:	2022
Publisher:	AMER GEOPHYSICAL UNION
Place of Publication:	WASHINGTON
ISSN:	2169-9100
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MIDDLE ATMOSPHERE; THERMAL STRUCTURE; DEPENDENCE; MESOSPHERE; WAVES Multiple languages Geochemistry & Geophysics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/69142