Haus, Rainer and Arnold, Gabriele (2010) Radiative transfer in the atmosphere of Venus and application to surface emissivity retrieval from VIRTIS/VEX measurements. Planetary and Space Science, 58 (12), pp. 1578-1598. Elsevier. doi: 10.1016/j.pss.2010.08.001.
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Abstract
The radiation measurements of VIRTIS-M-IR (1â��5 �¼m) on Venus Express provide a valuable database for systematic studies of the atmosphere and surface of the Earthâ��s sister planet. The present paper focuses on the investigation of physical parameters that determine the retrieval accuracy of deep atmosphere and surface features of Venus including compositional conditions, continuum absorption effects, and spectroscopic input data required for radiative transfer simulations. The parameter discussion shall serve as a reference for ongoing and future work on methodical and simulation input data improvements. The high variability of the nightside atmospheric and surface emission window radiances with respect to cloud opacity and surface elevation is modeled and discussed in direct comparison with measurements performed over the northern hemisphere. Venus surface elevation is retrieved using the 1.18 and 1.02 �¼m emission windows where radiance ratios are well suited to de-cloud the measurement data. In general, the ratio-based VIRTIS topography is in good agreement with the Magellan topography, but differences occur in localized areas. The paper discusses possible origins of such differences including surface emissivity â��anomaliesâ��. Surface emissivity variations that may be due to changes in the chemical composition (mineralogy) and surface texture are important indicators of the nature of the surface material. Preliminary radiance retrievals along a number of complete northern orbits reveal a trend towards lower values of highland surface emissivity compared to the surrounding lowlands. Already the Magellan radar experiment suggested compositional variations at moderately high altitudes over the tesserae. They probably indicate a more felsic component giving a hint to older surface forming processes.
Item URL in elib: | https://elib.dlr.de/68376/ | |||||||||
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Document Type: | Article | |||||||||
Title: | Radiative transfer in the atmosphere of Venus and application to surface emissivity retrieval from VIRTIS/VEX measurements | |||||||||
Authors: |
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Date: | 2010 | |||||||||
Journal or Publication Title: | Planetary and Space Science | |||||||||
Refereed publication: | Yes | |||||||||
Open Access: | No | |||||||||
Gold Open Access: | No | |||||||||
In SCOPUS: | Yes | |||||||||
In ISI Web of Science: | Yes | |||||||||
Volume: | 58 | |||||||||
DOI : | 10.1016/j.pss.2010.08.001 | |||||||||
Page Range: | pp. 1578-1598 | |||||||||
Publisher: | Elsevier | |||||||||
Status: | Published | |||||||||
Keywords: | Radiative transfer; Planetary atmospheres; Surface materials and properties; Clouds and aerosols; Venus | |||||||||
HGF - Research field: | Aeronautics, Space and Transport (old) | |||||||||
HGF - Program: | Space (old) | |||||||||
HGF - Program Themes: | W EW - Erforschung des Weltraums | |||||||||
DLR - Research area: | Space | |||||||||
DLR - Program: | W EW - Erforschung des Weltraums | |||||||||
DLR - Research theme (Project): | W - Vorhaben Venus Express (old) | |||||||||
Location: | Berlin-Adlershof | |||||||||
Institutes and Institutions: | Institute of Planetary Research | |||||||||
Deposited By: | Pieth, Susanne | |||||||||
Deposited On: | 13 Jan 2011 11:02 | |||||||||
Last Modified: | 12 Dec 2013 21:13 |
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