Gorinov, D. A.D. A.GorinovKhatuntsev, I. V.I. V.KhatuntsevZasova, L. V.L. V.ZasovaTurin, A. V.A. V.TurinPICCIONI, GIUSEPPEGIUSEPPEPICCIONI2021-04-232021-04-2320180094-8276http://hdl.handle.net/20.500.12386/30892The paper is devoted to the investigation of Venus mesosphere circulation at 90-110 km altitudes, where tracking of the O<SUB>2</SUB>(a<SUP>1</SUP>∆<SUB>g</SUB>) 1.27 μm nightglow is practically the only method of studying the circulation. The images of the nightglow were obtained by VIRTIS-M on Venus Express over the course of more than 2 years. The resulting global mean velocity vector field covers the nightside between latitudes 75°S-20°N and local time 19-5 h. The main observed mode of circulation is two opposite flows from terminators to midnight; however, the wind speed in the eastward direction from the morning side exceeds the westward (evening) by 20-30 m/s, and the streams "meet" at 22.5 ± 0.5 h. The influence of underlying topography was suggested in some cases: Above mountain regions, flows behave as if they encounter an "obstacle" and "wrap around" highlands. Instances of circular motion were discovered, encompassing areas of 1,500-4,000 km.STAMPAenArticle10.1002/2017GL0763802-s2.0-85043706660WOS:000428402400048https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1002/2017GL0763802018GeoRL..45.2554GFIS/05 - ASTRONOMIA E ASTROFISICAERC sectors::Physical Sciences and Engineering