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Q.

What is katabatic current?

Asked by nitesh kumar, 23 Jul '07 01:22 pm
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Answers (3)

1.

Basically it is a measurment of Notcturnal flow of winds at the boundry and slope.IT is primarily for Vertical Transport and Mixing experiments usually near a glacier.It is usually mausred at complex terrain regions;It isa big chpater by itself
Great Question baddy !
Answered by srini, 23 Jul '07 01:32 pm

 
  
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2.

A katabatic wind, from the Greek word katabatikos meaning "going downhill", is a wind that blows down a topographic incline such as a hill, mountain, or glacier. Such winds, particularly when they occur over a wide area, are sometimes called fall winds.

A distinction is drawn between winds that feel warmer than their surroundings (generally called Fhn or regionally, Chinook, Santa Ana, Bergwind or Diablo) and those that are cooler (for instance the Mistral in the Mediterranean, the Bora (or Bura) in the Adriatic or the Oroshi in Japan). In more recent times, however, the term katabatic wind usually refers to the cold variant.

The cold form of katabatic wind originates in a cooling, either radiatively or through vertical motion, of air at the top of the mountain, glacier, or hill. Since the density of air increases with lower temperature, the air will flow downwards, warming adiabatically as it descends, but still remaining relatively cold.

Cold katabatic winds are frequently f ...more
Answered by impossible, 23 Jul '07 01:24 pm

 
  
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3.

The evolution of Antarctic katabatic wind in the vicinity of Terra Nova Bay has been studied using a three-dimensional, hydrostatic, limited area model. Realistic simulations of a summer katabatic event, using different horizontal resolutions, have been performed by employing a sequential self-nesting procedure. The high-resolution orography data allow a description of the structure of the main valleys and of the two different flows descending from the broad Reeves Glacier and (with less accuracy) channelled into the much narrower Priestley Glacier valley, respectively. The mechanism of katabatic wind development has been investigated by means of a Lagrangian diagnostic study performed along trajectories flowing down from the above-mentioned glaciers. Heat balance and kinetic energy balance have been evaluated accurately in order to asses the characteristics of the two katabatic currents that may superpose once they reach the Nansen Ice Sheet.
Answered by Ashok kumar, 23 Jul '07 01:23 pm

 
  
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