For a clear night and with windspeeds < 3 m/s, the atmosphere is
Clear Night Wind < 3 m/s: Understanding Atmospheric Stability
Atmospheric stability refers to the atmosphere's tendency to resist or promote vertical air movement. Specific conditions influence this stability.
Key Conditions
- Clear Night: Allows unimpeded outgoing longwave radiation from the Earth's surface.
- Windspeeds < 3 m/s: Indicates very light or calm conditions, limiting vertical mixing.
Atmospheric Response
During a clear night, the ground surface loses heat rapidly through radiation. This causes the lowest layer of air to cool significantly.
With minimal wind, this cold, dense air near the surface is not mixed with the warmer air above. This leads to a situation where temperature increases with height, known as a temperature inversion.
Stability Assessment
A temperature inversion suppresses vertical motion because parcels of air rising from near the surface are colder (and denser) than their surroundings, forcing them back down. Conversely, sinking air warms faster than it should if it were to reach a lower, colder level.
Therefore, under these specific conditions (clear night, low windspeed), the atmosphere is significantly stable.
Important Questions from Basics of Environment
- Protecting nature and the wilderness for its own sake is referred as
- A local population genetically, structurally and functionally adapted to its local environment is called
What percentage of energy coming from the Sun is re-radiated towards the space?
Largest amount of freshwater is present in :
Consider the following statements:
(a) The radiation reflected back to the atmosphere is called albedo.
(b) The atmosphere is essential in maintaining the heat balance of the body.
(c) The heat and sunlight both pass through the atmosphere.
Which of the statements(s) given above is/are correct?
