In November Galileo made its closest pass yet to Jupiter, skimming 89,000 miles above the planet's
upper cloud layer.
There's a mechanism for high direct backscattering
at upper cloud surfaces [for an albedo of 0.7, 40 % of the light is directly backscattered].
On Saturn, a hydrogen gas planet, ten times the size of Earth, cold in
its upper clouds, without a solid surface, and with an atmosphere as deep as that of an ocean, «the hexagonal wavy motion of the jet stream is expected to be propagated vertically and reveal to us aspects of the planet's hidden atmosphere,» pointed out Agustín Sánchez - Lavega, Head of the Planetary Sciences research group.
The journey lasts around 8 hours and includes stops in different Andean towns with chances to walk and experience
the upper Cloud Forest habitat.
Adding the lapse rate surface temp would be around 500 K even if
the upper clouds were moved to 30 km (and I don't think they would have moved that far down).
Another oddity, because most of the solar input is absorbed by
the upper cloud layer, its temperature would have been around 200K even without much gh - effect.