01 - Weather_Climate_Atmosphere(1)

History of meteorology 340 bc aristotle writes

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History of Meteorology 340 B.C.: Aristotle writes Meteorologica 1600s-1700s: Weather instruments invented 1843: Telegraph invented 1920s: Study of air masses and fronts 1940s: Upper-air observations begin 1950s: Development of weather radar and computers 1960s: First satellites launched
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Weather Weather – Atmospheric conditions at a particular time and place Elements: Temperature, pressure, humidity, cloud cover, precipitation, visibility, wind speed and direction
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Weather
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Tornado: 10 m – 1 km (not shown) Mid-latitude cyclone: 1000 km Hurricane: 500 km Thunderstorms: 10-100 km
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Climate The average weather over a long (10+ year) period of time Weather records Climate changes over long periods of time and is changing now Need to look at long-term trends in weather data to evaluate climate changes Often requires detailed statistical analysis You CANNOT see climate change by looking out the window!!! Can’t prove anything by cherry picking a few data points either
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Weather vs. Climate CANNOT use individual weather events to prove or disprove changes in climate! Climate is what you expect, weather is what you get
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Observing the Weather Weather Instruments Satellites (space) Radar (ground)
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Satellites – View clouds from space
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Radar – Views precipitation from ground Doppler radar – Can sense motion of precipitation particles toward/away from radar
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Reflectivity (rain)
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