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They often are seen best on satellite photographs. When observed at high levels (i.e., in cirrus formations), they may indicate severe or extreme turbulence.
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These clouds of dust are visible in satellite photos. Findings to date indicate that the iron-rich dust particles which often occur within the SAL reflect solar radiation, thus cooling the atmosphere.
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The formal definition includes specific minimum criteria for size, duration, and eccentricity (i.e., "roundness"), based on the cloud shield as seen on infrared satellite photographs: Size: Area of cloud top -32 degrees C or less: 100, ...
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In another part of the room, the Harris Lazerfax printer ejected satellite photographs, alternately standard mosaic and infrared, one after another every couple of minutes.
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Comma Cloud - a synoptic-scale cloud pattern with a characteristic comma-like shape, often seen on satellite photographs associated with large and intense low- pressure systems ...
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A synoptic scale cloud pattern with a characteristic comma-like shape, often seen on satellite photographs associated with large and intense low- pressure systems. Comma Echo ...
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Isabel is shown in the IR satellite photo on the 12th. Because of a strong high to the north, Isabel did not recurve like Fabian, and continued on a northwesterly course.
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See also: Satellite, Weather, Cloud, Storm, Thunder
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