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Measuring temperatures

Measuring temperatures. Actually measuring sensible heat transfer Can be measured as Kelvins, degrees Celsius, or degrees Fahrenheit. Fahrenheit. Developed in the early 1800’s by Daniel G. Fahrenheit Coldest temperature measured was set to O°F

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Measuring temperatures

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  1. Measuring temperatures • Actually measuring sensible heat transfer • Can be measured as Kelvins, degrees Celsius, or degrees Fahrenheit

  2. Fahrenheit • Developed in the early 1800’s by Daniel G. Fahrenheit • Coldest temperature measured was set to O°F • Approximate temperature of the human body was 100°F • Melting point of ice became 32°F • Boiling point of water became 212°f

  3. Celsius • Also developed in the early 1700’s this time by Anders Celsius • Placed the freezing point of water at 0°C • Placed the boiling point of water at 100°C

  4. FAHRENHEIT TO CELSIUS AND VICE VERSA • CELSIUS TO FAHRENHEIT • TAKE °C THEN MULTIPLY BY 1.8 AND ADD 32 • FAHRENHEIT TO CELSIUS • TAKE °F SUBTRACT 32 THEN DIVIDE BY 1.8

  5. Temperature controls • Latitude • Altitude • Cloud cover • Land water heating differences (Continentality) • Localized Microscale – Environment • Prevailing Winds

  6. Altitude • Because of the temperature decrease with the normal lapse rate, temperatures will drop as you go up in elevation • Mountainous areas are therefore typically cooler than low-lying areas • Temperature rangesare usually higher for mountainous zones

  7. Cloud cover • Moderate temperatures • Reduce the amount of insolation reaching the Earth’s surface • Lowers daytime temperatures • KEEPS NIGHT TEMPERATURES MODERATE • Prevents longwave radiation from being lost to space

  8. Land-water heating differences • Land heats and cools faster than water • The main reasons relate to • Evaporation • Transparency • Specific heat • Movement

  9. Continentality • Index of Continentality A = difference °C in warmest and coldest months , Ф = location’s latitude

  10. Sensible Heat flux Latent Heat flux

  11. Extremes Extremes

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