Understanding Pressure-Vertical, Horizontal Distribution & Measurement in Climatology YouTube Lecture Handouts

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Understanding Pressure - Vertical, Horizontal Distribution & Measurement in Climatology

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Climatology Pressure

  • Wind and atmospheric pressure both are important controlling factors of Earth’s weather and climate.

  • Wind exists because of horizontal and vertical differences (gradients) in pressure.

Image of Climatology Pressure

Image of Climatology Pressure

Image of Climatology 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

Temperature profile of atmosphere across various layers

Temperature Profile of Atmosphere

Temperature profile of atmosphere across various layers

Horizontal Distribution (at Sea Level)

The various winds discussed are:

  • Northeast Trade winds

  • South westerlies

  • Polar easterlies

Cells of easterlies and westerlies in both hemispheres

Cells of Easterlies and Westerlies

Cells of easterlies and westerlies in both hemispheres

Image of High And Low Pressure Systems

Image of High and Low Pressure Systems

Image of High And Low Pressure Systems

Barometer

  • It is an instrument measuring atmospheric pressure.

  • Used especially in forecasting weather and determining altitude.

Understanding barometer

Understanding Barometer

Understanding barometer

Aneroid Barometer

  • A device for measuring atmospheric pressure without the use of fluids.

Image of pressure guage

Pressure Guage

Image of pressure guage

Mercury Barometer

  • In that, atmospheric pressure balances a column of mercury.

  • The height of which can be exactly measured.

Image of Mercury Barometer

Image of Mercury Barometer

Image of Mercury Barometer