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Meteorology and Atmospheric Pressure: Understanding Weather Events and Pressure Systems, Summaries of Earth, Atmospheric, and Planetary Sciences

University of the OzarksEarth, Atmospheric, and Planetary Sciences

An overview of meteorology, focusing on the collection, interpretation, and analysis of meteorological data related to severe weather events. It covers the concept of atmospheric pressure, its effect on the troposphere, standard barometric pressure, and how altitude affects atmospheric pressure. Additionally, it discusses the comparison of atmospheric pressure on Earth, Mars, and Venus, and the relationship between atmospheric pressure and weather. Lastly, it introduces high and low pressure systems.

Typology: Summaries

2021/2022

Uploaded on 09/27/2022

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Notes! – Keep with you at home
don’t return to this lesson to school.
Date: ______________________
S2-4-05 Collect, interpret, and analyze meteorological data related to a severe weather
event. Include: meteorological maps, satellite imagery, conditions prior to and following
the event.
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Download Meteorology and Atmospheric Pressure: Understanding Weather Events and Pressure Systems and more Summaries Earth, Atmospheric, and Planetary Sciences in PDF only on Docsity!

Notes! – Keep with you at home

don’t return to this lesson to school.

Date: ______________________ S2- 4 - 05 Collect, interpret, and analyze meteorological data related to a severe weather event. Include: meteorological maps, satellite imagery, conditions prior to and following the event.

Atmospheric Pressure

If all the weather occurs in the troposphere what effect do the other layers of the atmosphere have on the troposphere? Each layer of air applies pressure on the layer below to create atmospheric pressure. The air molecules in the layers of the atmosphere are being pulled towards the earth’s surface by the force of gravity. So why don’t we feel the atmospheric pressure? Two reasons:

  1. We are use to the pressure, it pushes all around us in all directions, not only downward
  2. The atmosphere consists of gases which we move through and it moves around us , so we don’t feel the pressure. Look at fig. 13.

Comparing ATM Pressure with other Planets The atmospheric pressure on Mars is much less than on Earth it is about 1/1000th the pressure on Earth. Venus has an atmospheric pressure about 100 times that of Earth. It has a thick CO2 atmosphere. The atmosphere is poisonous to people and because it is so thick it is difficult to see objects far away from you

Atmospheric Pressure and the Weather

Air Pressure systems are responsible for most weather conditions on the earth.

  • Air moves from high pressure to low pressure.
  • Clear, cool, sunny skies are associated with high pressure systems.
  • Cloudy, warm, wet skies are associated with low pressure systems.
  • Cool air is heavy and exerts more pressure on the earth.
  • Warm air is lighter and rises, exerting less pressure on the earth.
  • However, as the warm air rises, it cools and condenses to form clouds which produces rain thunderstorms, tornados, hurricanes etc.

Review the characteristics of a High Pressure and Low Pressure System What are the characteristics of a high pressure system? page 499 in text

  • Air is pushing down on the

ground

  • Air is cold and dense
  • Air moves in a clockwise

direction

  • Air moves out at the bottom

of the high pressure system

  • Creates clear sky
  • May be hundreds of km wide What are the characteristics of a low pressure system? page 500 in text
  • Air is being pulled up and

creates clouds

  • Air is warm
  • Air moves inward at the

bottom of the system

  • Air moves in a

counterclockwise direction

  • Creates unstable conditions

like snow and rain

  • Usually smaller than a high

pressure system