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Introduction Topics (Units, Isoplething , Radiation)

Introduction Topics (Units, Isoplething , Radiation). Temperature Conversions. Kelvin scale should be used in all formulas and calculations! Kelvin = Celsius + 273.15 Celsius = (5/9)*(Fahrenheit – 32) Fahrenheit = [(9/5)*Celsius] + 32. Temperature Conversions ( cont ).

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Introduction Topics (Units, Isoplething , Radiation)

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  1. Introduction Topics (Units, Isoplething, Radiation)

  2. Temperature Conversions Kelvin scale should be used in all formulas and calculations! Kelvin = Celsius + 273.15 Celsius = (5/9)*(Fahrenheit – 32) Fahrenheit = [(9/5)*Celsius] + 32

  3. Temperature Conversions (cont) Example: Convert 85oF to the Kelvin Scale. Celsius = (5/9)*(Fahrenheit – 32) = (5/9)*(85 – 32) = 29.4oC Kelvin = Celsius + 273.15 = 29.4 + 273.15 = 302.6 K

  4. Isoplething Contouring to visualize spatial data.

  5. Isoplething Example

  6. Inferences from Islopleths Clouds form where air rises and dissipate where air sinks. Air is forced to rise when blown into mountains and sinks after cresting the peak. With a westerly wind, where do we expect to see the most rain?

  7. Radiation Basics The higher the temperature of an object, the more energy it emits! Quantified by the Stefan-Boltzmann Law: Energy Emitted = σ * Temperature4 σ = 0.0000000567 W/m2K4 Everything with a temperature emits radiation.

  8. Stefan Boltzmann Example • A hot cup of coffee (35oC) is sitting outside. It absorbs 400 W/m2 of energy from the sun. Is coffee getting warmer, getting colder, or keeping a constant temperature. Kelvin = Celsius + 273.15 = 35+ 273.15 = 308 K Energy Emitted = σ * Temperature4 = (0.0000000567 W/m2K4) * (308 K)4 = 510 W/m2 So, what’s happening to the coffee?

  9. Lab Assignment 1.1 (a, b) 1.41.7 (a, b, c) 1.10 (a, c, d, e) 2.1 (a, b, c) 2.2 2.6

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