2:40 PM
Experts say the cloud is an example of "Kelvin-Helmholtz waves." Whether in the sky or the ocean, the type of turbulence is always formed when a layer or a fast-moving fluid sliding on a thick layer that moves more slowly so that the surface drag.
Water waves, for example, is formed when a layer of fluid on it (air) moves faster than the fluid layer beneath it (water). When the difference between wind and water speed increased to a certain point, breaking waves, formed as cabit are leaning forward. Form that is referred to as Kelvin-Helmholtz wave form.
According to Chris Walcek, meteorologist at the Atmospheric Sciences Research Center at the State University of New York at Albany, the wind moving fast across the sky can drag the top of the slow-moving clouds underneath in the same way.
"In the pictures sky Birmingham, there may be a layer of cold air near the surface wind speed is low," said Walcek. "That is why there are clouds or fog in that layer. On the top layer of slow-moving cold cloud was likely there is a layer of warm air to move faster. "
Generally, wind speed and temperature difference between the two layers of the atmosphere is so small that this fast-moving air glide smoothly over the slow moving air, "said Walcek. Sometimes, the difference is so extreme. If the wind speed difference is too large, the interface between the two layers were split into random turbulence.
Kelvin-Helmholtz waves are formed when wind speed and temperature differences in the two layers touching the appropriate point. "This photo shows the air between two layers of the atmosphere is very close to the threshold of turbulence and mixing to combine the two layers into one," he said.
Mystery of the Giant Tsunami Clouds in the Sky Alabama
Tsunami wave-shaped cloud that billowed in the sky Alabama, USA. Photo: yahoo.com.
Rows of giant clouds of the sky was like a besieged city of Birmingham in Alabama, United States, last Friday. Tsunami wave-shaped cloud of swirling it makes the local weather stations swamped with questions people who come bring pictures that strange cloud, "Is this a tsunami in the sky?"
Experts say the cloud is an example of "Kelvin-Helmholtz waves." Whether in the sky or the ocean, the type of turbulence is always formed when a layer or a fast-moving fluid sliding on a thick layer that moves more slowly so that the surface drag.
According to Chris Walcek, meteorologist at the Atmospheric Sciences Research Center at the State University of New York at Albany, the wind moving fast across the sky can drag the top of the slow-moving clouds underneath in the same way.
"In the pictures sky Birmingham, there may be a layer of cold air near the surface wind speed is low," said Walcek. "That is why there are clouds or fog in that layer. On the top layer of slow-moving cold cloud was likely there is a layer of warm air to move faster. "
Generally, wind speed and temperature difference between the two layers of the atmosphere is so small that this fast-moving air glide smoothly over the slow moving air, "said Walcek. Sometimes, the difference is so extreme. If the wind speed difference is too large, the interface between the two layers were split into random turbulence.
Kelvin-Helmholtz waves are formed when wind speed and temperature differences in the two layers touching the appropriate point. "This photo shows the air between two layers of the atmosphere is very close to the threshold of turbulence and mixing to combine the two layers into one," he said.
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