Understanding Pressure - Vertical, Horizontal Distribution & Measurement in Climatology YouTube Lecture Handouts
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Understanding Pressure - Vertical, Horizontal Distribution & Measurement in Climatology
Climatology Pressure
- Wind and atmospheric pressure both are important controlling factors of Earthีs weather and climate.
- Wind exists because of horizontal and vertical differences (gradients) in pressure.
Vertical Distribution
- At the lower layer of the atmosphere:
- Density of air and the atmospheric pressure is high.
- Atmospheric pressure decreases with increasing height.
- Troposphere the rate of decrease in air pressure is 34 mb for every 300 m of height.
- The various layers include troposphere, stratosphere, mesosphere and thermosphere
Horizontal Distribution (At Sea Level)
The various winds discussed are:
- Northeast Trade winds
- South westerlies
- Polar easterlies
Barometer
- It is an instrument measuring atmospheric pressure.
- Used especially in forecasting weather and determining altitude.
Aneroid Barometer
- A device for measuring atmospheric pressure without the use of fluids.
Mercury Barometer
- In that, atmospheric pressure balances a column of mercury.
- The height of which can be exactly measured.
โ Manishika