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Mr. Hartwell -- F-M Meteorology

Mr. Hartwell -- F-M Meteorology. Atmospheric Optics High Atmosphere. http://www.atoptics.co.uk. Earth’s Atmosphere. Atmosphere Optics. Dust, aerosols, & water droplets reflect & refract light from the sun Air particles scatter colors to make the sky blue and sunsets red

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Mr. Hartwell -- F-M Meteorology

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  1. Mr. Hartwell -- F-M Meteorology Atmospheric Optics High Atmosphere http://www.atoptics.co.uk

  2. Earth’s Atmosphere

  3. Atmosphere Optics • Dust, aerosols, & water droplets reflect& refract light from the sun • Air particles scatter colors to make the sky blue and sunsets red • Air at different temperatures & densities refract light in different ways

  4. Reflection • Reflection: Re-transmission of light from a surface

  5. Refraction • Refraction: Bending of light as it enters/exits a substance; dependant on density changes.

  6. Scattering • Scatter: Light hits dust & particulates and bounces light in different directions • Results in fluorescence & different coloration

  7. Nacreous Clouds above the Troposphere • Tropospheric clouds at bottom; rare nacreous clouds above • Form at -85oC in lower stratosphere • 15-25 km high Image: Paul Newman NASA Goodard Space Flight Center

  8. Nacreous Clouds • Form of PSCs • (Polar Stratospheric Clouds) • Wave pattern shows wind patterns in stratosphere • AKA: Mother of pearl clouds Image: McMurdo Station, Antarctica

  9. Polar Stratospheric Clouds • Type 1 • Form at warmer temperatures (-78oC) • Sites of destruction of ozone in polar regions • Type 2 • Lower temps • Composed of ice crystals Click the picture for more images of Nacreous clouds

  10. Noctilucent Clouds • “Night-shining clouds” • Typical at latitudes 50-650 Click the picture for more images of Noctilucent Clouds

  11. Noctilucent Clouds • Source? • Volcanic dust • Meteoric dust?

  12. Rocket Trails & Others • Water droplets act as prisms to produce: • Coronas • Fogbow • Specter Chasing Click here to view the images

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