New cloud morphologies discovered on the Venus’s night during Akatsuki. (arXiv:1905.08913v1 [astro-ph.EP])
<a href="http://arxiv.org/find/astro-ph/1/au:+Peralta_J/0/1/0/all/0/1">J. Peralta</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Sanchez_Lavega_A/0/1/0/all/0/1">A. S&#xe1;nchez-Lavega</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Horinouchi_T/0/1/0/all/0/1">T. Horinouchi</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+McGouldrick_K/0/1/0/all/0/1">K. McGouldrick</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Garate_Lopez_I/0/1/0/all/0/1">I. Garate-Lopez</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Young_E/0/1/0/all/0/1">E. F. Young</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Bullock_M/0/1/0/all/0/1">M. A. Bullock</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Lee_Y/0/1/0/all/0/1">Y. J. Lee</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Imamura_T/0/1/0/all/0/1">T. Imamura</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Satoh_T/0/1/0/all/0/1">T. Satoh</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Limaye_S/0/1/0/all/0/1">S. S. Limaye</a>

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 {mu}m
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.

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 {mu}m
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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