The wave may originate in a clear layer beneath the clouds, only becoming visible when it propagates up into the cloud deck
, according to the researchers.
After a second set of more sensitive observations led by researchers at the University of Chicago returned the same result, it became clear that a high cloud deck
must be masking the signature of absorption from the planet's atmosphere.
Saturn was bright in Virgo in the late evening; Mr James showed a superb image of the planet by Damian Peach, and a software transformation that showed the remarkable standing wave in the planet's cloud deck
called the 'north polar hexagon'.
Scientists were able to exclude an internal source, such as water rising from deeper within the planet's atmosphere, because it is not possible for water vapour to pass through the "cold trap" that separates the stratosphere from the visible cloud deck
in the troposphere below.
The morning's low clouds and light rain precluded early NKPAF operations, but by 1315 the cloud deck
began to break up allowing a reconnaissance patrol by two Yak-9Ps to roam as far south as Seoul.
We were concerned about doing a whiteout take off and inadvertently entering the low cloud deck
I just did a project in the Congo, flying all day at 700 metres under solid cloud deck
The sky was overcast with a cloud deck
at 600 feet, which created an extremely dark night with no horizon.
The region that's producing sprites could be surrounded by 100 km or more of cloud deck
, which blocks your view.
Miles to the south a natural, fuel-scrubbing wildfire threw its lights on a massive cloud deck
1 allowed Air New Zealand to land its Boeing 737s when the cloud deck
was as low as 600 feet above the ground - or 423 feet lower than they could land when they were flying the RNP 0.
Wags looked at me, shrugged, blew me a kiss and broke hard left, disappearing immediately into the cloud deck