Monday, March 1, 2010

Snagged and sharing - Clouds and Mountains

Clouds and mountains - two majestic powers of earth and sky.
They seem to confront each other in dramatic fashion – like armies lined up to do battle – and what spectacle when they do.
clouds vs mountains
Clouds form over a mountain range west of Salt Lake City, Utah
In the photo below, a sea of clouds envelops the terrain around Mount Killimanjaro at sunrise, while Africa’s highest peak at 5,891 metres (19,330 ft) looks on, indomitable.
sunrise over Killimanjaro with a sea of clouds
Meanwhile, in this view into the crater and ash cone of Mount Meru from the summit peak, an army of clouds encroaches around its lower reaches and looks ready to scale its sides.
Mount Meru with clouds encroaching
Below, Piz Bernina is practically engulfed in clouds almost indistinguishable from snow covering the crags of what is the Eastern Alps’ highest peak at 4,049 metres (13,283 ft).
PizBernina engulfed in clouds
Looking down California’s Hopper Mountain at low hanging clouds, the mountains in the distance seem to just about have the upper hand over the blanket lying beneath.
California's Hopper Mountain with low hanging clouds
This magnificent sunset scene from the rim of Mount Rinjani in Indonesia shows distant peaks again fortress-like in their defence against the clouds that would overwhelm them.
view from Rinjani Mountain with low lying clouds
Here, an aerial panorama shows the truly epic scale of the struggle. A great swathe of cloud mass threatens to swallow up the Alps, while beyond the front lie more peaks – and yet more clouds!
Alps from above swallowed by clouds
This shot from a plateau of the Zugspitze, Germany’s highest mountain at 2,962 metres (9,718 ft), shows the view towards the Wetterstein range, smothered by another range – of clouds – on top.
Zugspitze with view towards Wetterstein range, shrouded in clouds
Finally, the science bit. Clouds are of course formed by condensation as water vapour forms into tiny droplets or ice crystals just a fraction of a millimetre wide. Small they may be, but when these crystals get together, crowding around one another in their billions, they become visible as clouds. Clouds appear white because they are able to reflect light; this halo-like lenticular cloud – a stationary cloud that forms at high altitudes – is a case in point.
lens-shaped lenticular cloud
One way clouds are formed is when they rise over mountains. Confronted by the sheer mass of landforms shaped by fates like the collisions of continental plates, there is only one way the wraiths of the skies can go and that’s up. So spare a thought for clouds: while they may seem to assail the peaks of mountains, they have little choice.
We leave you with a shot of a lenticular cloud over Nanda Devi, India’s seconds highest peak at 7,816 metres (25,643 ft).
Lenticular Cloud over Nanda Devi

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