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Lecture Notes (Week 1 - 1/14/16)

by: Briana Notetaker

Lecture Notes (Week 1 - 1/14/16) GEOG 1112 030

Marketplace > Georgia State University > Geography > GEOG 1112 030 > Lecture Notes Week 1 1 14 16
Briana Notetaker
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About this Document

These notes will be included on the first exam, from dates February 5th - February 7th. These notes are titled, 'Intro to Weather & Weather Maps.'
Prof. Qureshi
Class Notes
Geog1112, geography, intro to, intro to weather and climate, weather, climate





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This 2 page Class Notes was uploaded by Briana Notetaker on Friday January 15, 2016. The Class Notes belongs to GEOG 1112 030 at Georgia State University taught by Prof. Qureshi in Spring 2016. Since its upload, it has received 72 views. For similar materials see INTRO TO WEATHER & CLIMATE in Geography at Georgia State University.


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Date Created: 01/15/16
Geog 112 - Intro to Weather & Climate Lecture Notes 1/14/16: (Homework opens 1/15/16, due 1/21/16 @ 11:59pm) Intro to Weather & Weather Maps  Earth’s atmosphere o thin envelope of gases (mostly nitrogen and oxygen) o provides protections, air, water  What’s the difference between weather & climate? o Weather  state of atmosphere at a given place and time  short term (minutes to days) o Climate  long term state of atmosphere over many years  averages (at least 30 years) and extremes (record temps, etc.)  Observing the Weather: Surface o US: most surface observations (obs) from Automated Surface Observing System (ASOS) stations o Located at 900+ airports o Atlanta ASOS is Hartsfield Jackson  Observing the Weather: Upper-air o Radiosonde: instrument package carried by balloon o Launched mainly at NWS office o Balloon rises, obs recorded o Balloon expands, explodes, sonde drifts to ground  Observing the Weather: Storms and Precipitation (Precip) o Doppler Radar: detects precipitation, t-storms, tornadoes o Sends out energy pulses, bounce off water droplets, return to radar o Can detect intensity, speed, and direction motion  Observing the Weather: From Space o Satellites up in space “see” weather on Earth o Also measure water vapor, temperatures, lightning, etc.  Surface Weather Maps o Weather obs collected, plotted on synoptic scale maps  Synoptic = coincident in time Geog 112 - Intro to Weather & Climate o A universal time must be used  Universal Time o Time zone centered on Greenwich, England (Prime Meridian)  GMT, UTC, z  1200z = noon at Greenwich; 0000z = midnight o Time Conversion  EST: Subtract five hours  EDT: Subtract four hours o Atlanta: 1200z = morning; 0000z = evening  Station Model o Weather obs collected for as many as 18 variables o Obs coded onto station models  How to Decode Pressure o Look at first digit  Between 0 and 4: add a 10  Between 5 and 9: add a 9 o Add a decimal between last two digits o Examples:  849 = 984.9mb  138 = 1013.8mb  582 = 958.2mb  946 = 994.6mb  285 = 1028.5mb  Analyzing Weather Maps o Lines DRAWN ON WEATHER MAPS o Connect locations with same value of a weather variable o Examples  Isotherms: lines of equal temperature  Isobars: lines of equal pressure  Isotachs: lines of equal wind speed


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