Weather Weather Meteorology The study of weather Meteorologist
- Slides: 13
Weather
Weather • Meteorology – The study of weather • Meteorologist – A person who studies and analyzes weather
Weather • Weather is caused by the movement or transfer of energy. • Energy is transferred wherever there is a temperature difference between two objects. – Easy to observe, difficult to explain, and nearly impossible to predict accurately.
Weather • Many weather phenomena result from a transfer of energy that occurs via the movement of air in the atmosphere. • This is known as convection. • Air contains vapor from the evaporation of liquid sources on the Earth’s surface. • When air cools, it condenses and released water vapor in the form of precipitation. – This is a brief overview of the water cycle.
Weather • The physical transfer of heat and moisture through the convection process is the basis for the formation of many meteorological patterns and features including: – Fronts, thunderstorms, tornadoes, depressions, etc.
Weather • Weather is the short-lived condition of the air. • Short-lived because in some places you could experience complete weather patters in one day. • Some weather conditions continue for several days, weeks, or months.
What Does Weather Consist Of? • Temperature • The measure of the kinetic energy of an object. – How fast it is moving. – The more kinetic energy (the faster the particles are moving) the higher the temperature. • Measures heat – The higher the temperature the hotter it is.
What Does Weather Consist Of? • Measuring Temperature – Thermometer • Measure air temperature • Readings are expressed in degrees Fahrenheit and/or Celsius (Centigrade) • Two Types – Mercurial Thermometers » Not used as often because mercury is hazardous – Alcohol Thermometers
What Does Weather Consist Of? • Air Pressure – How “heavy” the atmosphere is at any given location. – Measured using barometers. • An aneroid barometer is an example. – Readings are expressed in inches, centimeters, or millibars.
What Does Weather Consist Of? • Precipitation – The amount of moisture that is released in various forms. • Snow, rain, hail – Measured • Using a rain gauge • Readings are expressed in inches or centimeters.
What Does Weather Consist Of? • Wind speed – How fast or slow the wind is moving – Measured • Uses an Anemometer to measure wind speed. • Readings are expressed in miles per hour or kilometers per hour.
What Does Weather Consist Of? • Relative Humidity – This consists of air quality and amount of water vapor. • How much moisture is in the atmosphere. – Measured • Uses a psychrometer – Readings are expressed in percents • Uses a hygrometer – Readings expressed in percents
What Does Weather Consist Of? • Other Conditions Considered: – Cloud Conditions • Types of clouds present – Visibility
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