New cloud morphologies discovered on the Venus's night during Akatsuki

J Peralta,A Sánchez-Lavega,T Horinouchi,K Mcgouldrick,I Garate-Lopez,E.F Young,M.A Bullock,Y.J Lee,T Imamura,T Satoh,S.S Limaye

doi:10.1016/j.icarus.2019.05.026

New cloud morphologies discovered on the Venus's night during Akatsuki

J Peralta, A Sánchez-Lavega + Show 9 more

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https://doi.org/10.1016/j.icarus.2019.05.026

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Journal: Icarus	Publication Date: May 30, 2019
Citations: 27	License type: cc-by-nc-nd

Affiliation: Institute of Space and Astronautical Science, University of the Basque Country, Hokkaido University, Laboratory for Atmospheric and Space Physics, University of Colorado Boulder, Southwest Research Institute, The University of Tokyo, University of Wisconsin–Madison

#Equatorial Troughs #Venus's Night + Show 8 more

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Abstract

During the years 2016 to 2018, the instruments Akatsuki/IR2 (JAXA) and IRTF/SpeX (NASA) acquired a large set of images at 1.74, 2.26 and 2.32 μm to study the nightside mid-to-lower clouds (48–60 km) of Venus. Here we summarize the rich variety of cloud morphologies apparent in these images: from frequent wave packets and billows caused by shear instabilities, to features reported decades ago like the circum-equatorial belts, bright blotches and equatorial troughs, and previously unseen features like dark spots, sharp dark streaks at mid latitudes and fully-developed vortices.

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