期刊
GEOPHYSICAL RESEARCH LETTERS
卷 47, 期 1, 页码 -出版社
AMER GEOPHYSICAL UNION
DOI: 10.1029/2019GL084997
关键词
-
资金
- NASA through the MAVEN project
We report a new water-ice cloud feature observed during the Mars year 34 global dust storm: twilight cloud bands that routinely formed just past the evening terminator. We use images taken by the MAVEN/IUVS instrument. These bands were often latitudinally continuous, spanning over 6,000 km and were present between 18:00 and 19:00 local time. They were present for nearly the entire time IUVS imaged the evening terminator and often reached altitudes of at least 40 to 50 km during the mature phase of the storm. We compare these observations to LMD global climate model simulations. The simulations generally contain the temporal and spatial extents of the bands seen in IUVS data throughout the storm, but there are some discrepancies. We infer that these clouds formed as a result of semidiurnal thermal tides.
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