Clouds over Mongolia captured
9/10th July by Jonathan Shock (more
at about 4am local time on a flight from Europe to Beijing.
The view is to the south-west and Jupiter is near the horizon. This
is another sighting of the unusually southern extent of this summer's noctilucent clouds.
temperatures near the mesopause are needed to form
their microscopic ice crystals and, paradoxically, these occur in
summer. Increasing concentrations of CO2 could be
cooling the upper atmosphere.
At low altitude CO2 increases temperatures, higher up it cools
by radiating heat into space. Image ©Jonathan
Shock, shown with permission.