1. Gathering Weather Data Section 12.3

2. Data From Earth ’ s Surface Meteorologists measure temperature, air pressure, wind speed, and relative humidity __________– measures temperature; Fahrenheit or Celsius; liquid in glass or bimetallic strip _________ – measures air pressure; mercury or aneroid

3. Data From Earth ’ s Surface __________ – measures wind speed __________– measures the direction of wind _________ – measures humidity; sling psychrometer

4. Automated Surface Observing NWS, FAA, and Dept. of Defense established the ASOS. Began in 1990’s 24/7 weather data Provides info for aviation, weather forecasting, and weather research

5. Data in the Upper Atmosphere __________ is an instrument for gathering data in the upper atmosphere Include sensors and transmitters Suspended from a weather balloon Rawindsonde = radar + _____ + radiosonde Began in 1980’s now replaced by GPS tracking