PHY 118 final study guide -chapter 12

PHY 118 final study guide -chapter 12 - iv Use interactive...

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PHY 118 Final Study Guide: Chapter 12 I. National Weather Service (NWS): a. U.S. Government Agency responsible for gathering and disseminating weather- related information b. Provides forecasts and warnings of hazardous weather including: i. Thunderstorms ii. Flooding iii. Hurricanes iv. Tornadoes v. Winter weather vi. Extreme Heat c. Forecasting – Predicting the future state of the atmosphere based on scientific techniques and data i. Relies on the skill of the forecaster d. Forecasting involves i. Collecting weather data 1. National Centers for Environmental Prediction is the branch of the NWS that does this; located in maryland ii. Transmitting data iii. Compiling data globally iv. Analyzing accurately e. Nowcasting – A type of trend forecasting (determines speed and direction of fronts, cyclones, and areas of clouds/precipitation) i. Most effective over periods of just a few hours ii. Works well for predicting severe + short lived weather events 1. Hailstorms, tornadoes, and microbursts iii. Heavily dependent on weather radar and geostationary satellites
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Unformatted text preview: iv. Use interactive computers that integrate data from many sources f. Geostationary Satellites – Satellites that remain fixed over a given site i. Remains ‘fixed’ by orbiting at a greater distance and thus a higher speed than earth’s orbit ii. Keeps it moving in time with Earth iii. Provides visible, infrared (cold and hot) , and water-vapor (coming off of the Gulf of Mexico) images for North America every 30 minutes iv. Allow us to track movements of large weather systems that cannot be seen by weather radar or polar-orbiting satellites v. Important in tracking development + movement of tropical storms and hurricanes g. Polar Satellites – Orbit Earth at low altitudes and require only 100 minutes to orbit Earth i. Circle earth from pole to pole, north to south ii. Drift about 15 degrees westward over surface during each orbit iii. Obtain images of the entire Earth twice each day and coverage of a large region in only a few hours...
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This note was uploaded on 05/05/2011 for the course PHY 118 taught by Professor Schroeder during the Spring '11 term at Miami University.

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