CONVECTION REVIEW How does convection work?
Convection creates pressure systems.
When Air Rises = Low Pressure zone
When Air Sinks = High Pressure zone
HIGH PRESSURE SYSTEMS
Characteristics Air is going to sink in
areas of high pressure.
Air is going to spread out Move away from the high
These rotate because of the Coriolis Effect
Clockwise
LOW PRESSURE SYSTEMS
Characteristics Air is rising in a low
pressure system.
Air is coming together here flowing towards a low pressure
system.
This rotates because of the Coriolis effect
Counterclockwise
HIGH VS LOW What is considered high pressure?
High pressure (H) is air pressure that is equal to or above 29.92 inches
What is considered low pressure? Low pressure (L) is air pressure that is below 29.92 inches.
HOMEMADE BAROMETER Used to measure air pressure
Scientific Explanation: The pressure inside the jar is constant as we sealed it. So
when the atmospheric pressure ie, the pressure outside the jar, increases it pushes the rubber lid into the can which causes the straw to go up. So if the markings are higher than that was in the previous day, the atmospheric pressure is high and vice versa.
WEATHER INSTRUMENTS
Surface Instruments Upper-Level Instruments Anemometer: Wind
Speed
Hygrometer: Relative Humidity
Rain Gauge: Measures Rainfall
Ceilometer: Height of Clouds
Radiosondes: Measure Temperature,
Pressure, and Humidity
Doppler Radar: Uses frequencies Like Echolocation
Satellites: Track Clouds
FORECASTING Uses isopleths to plot data globally
Isopleth = Lines of equal value
Short Term Forecast = Very Accurate Use Immediate wind movement and cloud patterns
Long Term Forecast= Inaccurate Vague Too many factors
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