Trivia Question of the Day

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Presentation transcript:

Trivia Question of the Day

Lesson #4: Insolation

Insolation = Incoming Solar Radiation What is “Insolation?” Insolation = Incoming Solar Radiation

Earth’s Atmosphere and Insolation ***Brainstorm*** Does Earth’s atmosphere influence the amount of insolation? YES! Insolation may be transmitted, absorbed, reflected or scattered before reaching Earth’s surface Let’s take a closer look…

Earth’s Atmosphere and Insolation Incoming Solar Radiation = Outgoing Terrestrial (Earth) Radiation

What Influences the Absorption and Reflection of Insolation? 4 Main Factors Factor 1. Angle of Incidence Angle at which insolation hits Earth’s surface Determined by the altitude of the Sun Higher altitude = higher angle of incidence = more insolation absorbed Lower altitude = lower angle of incidence = less insolation absorbed ***Challenge Question*** In NYS, which season has the highest angle of incidence? Summer!

What Influences the Absorption and Reflection of Insolation? Factor 2. Earth’s Surface Characteristics Type of Material Specific heat is different for different materials (i.e. land heats up and cools down more quickly than water) Texture (how rough, uneven a surface is) More rough/uneven surface = more insolation absorbed (less reflected) Think: water! Color Darker colors = more insolation absorbed (i.e. dirt) Lighter colors = more insolation reflected (i.e. ice, snow)

Challenge Question

What Influences the Absorption and Reflection of Insolation? Factor 3. Interactions with Earth’s Materials and Living Things When energy from insolation causes water to change state (i.e. melt, evaporate) OR affects plant growth, it is NOT available to raise the temperature of Earth’s surface

What Influences the Absorption and Reflection of Insolation? Factor 4. Duration The amount of insolation received changes with the length of the day Longer day = more insolation received Shorter day = less insolation received ***Challenge Question*** In NYS, during which season is the length of the day the longest? Summer!