February 27, 2013

Asperatus Clouds over New Zealand

Asperatus Clouds over New Zealand What kind of clouds are these? Although their cause is presently unknown, such unusual atmospheric structures, as menacing as they might seem, do not appear to be harbingers of meteorological doom. Known informally as Undulatus asperatus clouds, they can be stunning in appearance, unusual in occurrence, are relatively unstudied, and have even been suggested as a new type of cloud. Whereas most low cloud decks are flat bottomed, asperatus clouds appear to have significant vertical structure underneath. Speculation therefore holds that asperatus clouds might be related to lenticular clouds that form near mountains, or mammatus clouds associated with thunderstorms, or perhaps a foehn wind - a type of dry downward wind that flows off mountains. Such a wind called the Canterbury arch streams toward the east coast of New Zealand's South Island. This image, taken above Hanmer Springs in Canterbury, New Zealand, in 2005, shows great detail partly because sunlight illuminates the undulating clouds from the side.  Image Credit & Copyright: Witta Priester Explanation: http://apod.nasa.gov/apod/ap130227.html

What kind of clouds are these? Although their cause is presently unknown, such unusual atmospheric structures, as menacing as they might seem, do not appear to be harbingers of meteorological doom. Known informally as Undulatus asperatus clouds, they can be stunning in appearance, unusual in occurrence, are relatively unstudied, and have even been suggested as a new type of cloud. Whereas most low cloud decks are flat bottomed, asperatus clouds appear to have significant vertical structure underneath. Speculation therefore holds that asperatus clouds might be related to lenticular clouds that form near mountains, or mammatus clouds associated with thunderstorms, or perhaps a foehn wind - a type of dry downward wind that flows off mountains. Such a wind called the Canterbury arch streams toward the east coast of New Zealand's South Island. This image, taken above Hanmer Springs in Canterbury, New Zealand, in 2005, shows great detail partly because sunlight illuminates the undulating clouds from the side.

Image Credit & Copyright: Witta Priester
Explanation: http://apod.nasa.gov/apod/ap130227.html

7 comments:

  1. Wow How beautiful!!!!! Over my country of New zealand

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  2. America in 1993 in Alaska Banks shot a research project using radio waves, ELF / ULF / VLF to track submarines created a theme. America facility jointly by the Air Force, Navy America, University of Alaska Fairbanks, and nearly 15 other American universities and office use. The manufacturer of the facility, the company is BAE Advanced Technologies.
    This system known as
    High-frequency active ionospheric research program

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