Universität zu Köln

Lee, Y. J., Titov, D. V., Ignatiev, N. I., Tellmann, S., Paetzold, M. and Piccioni, G. (2015). The radiative forcing variability caused by the changes of the upper cloud vertical structure in the Venus mesosphere. Planet Space Sci., 113. S. 298 - 309. OXFORD: PERGAMON-ELSEVIER SCIENCE LTD. ISSN 0032-0633

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Abstract

The upper cloud layer of Venus is a key factor affecting radiative energy balance of the mesosphere. Observations of the temperature and the cloud top structure by Venus Express revealed their strong variability with latitude. We used the 1-D radiative transfer model to study the dependence of the radiative forcing on the cloud top structure. The cloud top altitude effectively controls outgoing thermal fluxes. Sharp cloud top boundary can produce a pronounced peak of both solar heating and thermal cooling that suggests a radiative origin of temperature inversions in the cold collar. Strong diurnal variation of net forcing at low latitudes can be responsible for the origin of convective cells observed in UV images. Latitudinal contrasts in the radiative forcing in the mesosphere can drive meridional Hadley-type circulation with meridional winds of few m/s and vertical motions with speed of few cm/s. (C) 2014 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Lee, Y. J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Titov, D. V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ignatiev, N. I. UNSPECIFIED UNSPECIFIED UNSPECIFIED Tellmann, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Paetzold, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Piccioni, G. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-398278
DOI:	10.1016/j.pss.2014.12.006
Journal or Publication Title:	Planet Space Sci.
Volume:	113
Page Range:	S. 298 - 309
Date:	2015
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Place of Publication:	OXFORD
ISSN:	0032-0633
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MIDDLE ATMOSPHERE; THERMAL STRUCTURE; ABSORPTION; TEMPERATURE; SCATTERING; NIGHTSIDE; LIGHT; CO2; CIRCULATION; BALANCE Multiple languages Astronomy & Astrophysics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/39827