Abstract:
:In June 2015, Cassini high-resolution images of Saturn's limb southwards of the planet's hexagonal wave revealed a system of at least six stacked haze layers above the upper cloud deck. Here, we characterize those haze layers and discuss their nature. Vertical thickness of layers ranged from 7 to 18 km, and they extended in altitude ∼130 km, from pressure level 0.5 bar to 0.01 bar. Above them, a thin but extended aerosol layer reached altitude ∼340 km (0.4 mbar). Radiative transfer modeling of spectral reflectivity shows that haze properties are consistent with particles of diameter 0.07-1.4 μm and number density 100-500 cm-3. The nature of the hazes is compatible with their formation by condensation of hydrocarbon ices, including acetylene and benzene at higher altitudes. Their vertical distribution could be due to upward propagating gravity waves generated by dynamical forcing by the hexagon and its associated eastward jet.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Sánchez-Lavega A,García-Muñoz A,Del Río-Gaztelurrutia T,Pérez-Hoyos S,Sanz-Requena JF,Hueso R,Guerlet S,Peralta Jdoi
10.1038/s41467-020-16110-1subject
Has Abstractpub_date
2020-05-08 00:00:00pages
2281issue
1issn
2041-1723pii
10.1038/s41467-020-16110-1journal_volume
11pub_type
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