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An uppermost haze layer above 100 km found over Venus by the SOIR instrument onboard Venus Express

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Title: An uppermost haze layer above 100 km found over Venus by the SOIR instrument onboard Venus Express
Authors: Takagi, Seiko Browse this author
Mahieux, Arnaud Browse this author
Wilquet, Valerie Browse this author
Robert, Severine Browse this author
Vandaele, Ann Carine Browse this author
Iwagami, Naomoto Browse this author
Keywords: Venus
Cloud
Haze
Atmosphere
Spectroscopy
Issue Date: 21-Nov-2019
Publisher: Springer (SpringerOpen)
Journal Title: Earth planets and space
Volume: 71
Issue: 1
Start Page: 124
Publisher DOI: 10.1186/s40623-019-1103-x
Abstract: The Solar Occultation in the InfraRed (SOIR) instrument onboard Venus Express was designed to measure the Venusian atmospheric transmission at high altitudes (65-220 km) in the infrared range (2.2-4.3 mu m) with a high spectral resolution. In this work, we investigate the optical properties of Venus's haze layer above 90 km using SOIR solar occultation observations. Vertical and latitudinal profiles of the extinction coefficient, optical thickness, and mixing ratio of aerosols are retrieved. One of the most remarkable results is that the aerosol mixing ratio tends to increase with altitude above 90 km at both high and low latitudes. We speculate how aerosols could be produced at such high altitudes.
Rights: https://creativecommons.org/licenses/by/4.0/
Type: article
URI: http://hdl.handle.net/2115/76610
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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