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PICTURE OF THE MONTH
Vortex Look-Alikes: Juxtaposition of an Arizona Tornado and Dust Devil
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PICTURE OF THE MONTH
Thunderstorm Outflows: Different Perspectives over Arid and Mesic Terrain
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PICTURE OF THE MONTH
Aurora Borealis and City Lights
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PICTURE OF THE MONTH
A jet Stream Cirrus Shield
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PICTURE OF THE MONTH
Cirrus and Upslope Cloud Patterns
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Abstract
The enhancement of cirrus cloudiness by orographic effects along the periphery of a large-scale thin cirrus cloud system is illustrated. From radiometric measurements and comparison with a nearby sounding, it was found that the cloud tops coincided with the tropopause. Their high emissivity suggests cloud condensation in liquid form, which quickly freezes to form long ice-crystal plumes. These crystals may have seeded a supercooled liquid-droplet low cloud to cause snow at the ground.
Abstract
The enhancement of cirrus cloudiness by orographic effects along the periphery of a large-scale thin cirrus cloud system is illustrated. From radiometric measurements and comparison with a nearby sounding, it was found that the cloud tops coincided with the tropopause. Their high emissivity suggests cloud condensation in liquid form, which quickly freezes to form long ice-crystal plumes. These crystals may have seeded a supercooled liquid-droplet low cloud to cause snow at the ground.