Weather ReView

Weather ReView - Weather Dynamics ReView By: Vaibhav...

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Weather Dynamics Re V iew By: Vaibhav Mokashi Topic Details Weather The day-to-day environmental conditions in an area Climate Set of environmental conditions averaged over many years Factors that Influence weather dynamics 1. Air wind (atmosphere) 2. Water 3. Energy capacity to do work, measured in Joules (J) or Calories (Ca) 1 Ca = 4.2 J Formulas EMR Electromagnetic radiation travel at the speed of light (3 x 10 8 m/s) and can be divided into bands depending on the frequency range. Cosmic Rays High Energy (high frequency) Heat Transfer Transferred by 4 main methods: 1. Conduction 2. Convection 3. Advection 4. Radiation Conduction Generally happens when a solid is in direct contact with the heat source. Convection This is the transfer of energy by movement of fluid particles (includes liquids and gases). Heated fluids get less dense and rise, causing cooler more dense fluids to take its place. Advection The horizontal transport of heat. Radiation The transfer of heat in the form of waves sun to earth. Distance from Sun to Earth: Frequency Decreases Wavelength Increases Involve particles Hot Air Cool Air
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North American Weather Systems A weather system is a set of temperature, wind, pressure, and moisture conditions in a specific region that moves as a unit Weather systems occur as a result of the movement of air masses in our atmosphere Air mass A large body of air with the same temperature and moisture content throughout Ranges from 100 km across to 1000 km across Form when air above the ground or ocean is relatively still for a few days or weeks 1. Maritime (Water) polar (Poles) air masses- cool, moist 2. Continental (Land) polar air masses- cold, dry 3. Maritime tropical (Tropics- areas near equator) air masses- warm, moist 4. Continental tropical air masses- dry, warm North American weather systems move from west to east and can be one of these three types: 1. Low Pressure (spread out particles) Systems Tend to bring cloudy skies and stormy weather warm air 2. High Pressure (particles close together) Systems Tends to bring clear skies cold air 3. Stationary Front Occurs when a warm air mass and a cold air mass meet and remain still for a period of time Results in stable weather until the air masses are influenced by upper level winds 4. Jet Streams High speed winds in the upper troposphere; often around mid-latitudes and move from high pressure to low pressure areas 5. Cold Front The leading edge of a cold air mass 6. Warm Front The leading edge of warm air mass Although these systems can occur over a large part of the continent some regions can experience
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This note was uploaded on 05/29/2010 for the course SCI 5421 taught by Professor Russel during the Spring '10 term at Morton College.

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Weather ReView - Weather Dynamics ReView By: Vaibhav...

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