The Wayƒarers Journal ©

The Journal

The Wayƒarers

The Selƒ

The Journey

The Burden

The Mountain

   The Ancients
   The Earth
   The Life
   The Modern Man
   The Nonpareils

     The Crepuscular
     The Dayspring

      Alpenglow
      Blueglow
      Earth Shadow
      Even
      Green Flash
      Sunglow
      Suntouch
      Venus Belt

     The Heavens
     The Phenomena
     The Predictable

   The Steps
   The Way

The Appendix

The Wayƒarer
The Mountain
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THE DAYSPRING
The Alpenglow

The Alpenglow Go Down Go Up
The Glossary Definition
Alpenglow n. astr. 1. An atmospheric phenomenon occurring when the sun is just below the horizon, in which a horizontal red glowing band is observed on the horizon opposite to the sun.
This occurs when the sun is below suntouch and is caused by the sunlight being reflected off airborne ice, snow or water.
The Alpenglow
This is an optical phenomenon in which a horizontal red glowing band is observed on the horizon opposite to the sun. This effect occurs when the Sun is just below the horizon. Alpenglow is easiest to observe when mountains are illuminated but can also be observed when the sky is illuminated through backscattering.
Since the Sun is below the horizon, there is no direct path for the light to reach the mountain. Unlike sunset or sunrise, the light that causes alpenglow is reflected off airborne snow, water, or ice particles low in the atmosphere. These conditions differentiate between the alpenglow from the normal sunrise or sunset.
The term is generally confused to be any sunrise or sunset light seen on the mountains, but true alpenglow is not direct sunlight, and is only observed when the sun is below the suntouch.
The Alpenglow
(m5da-al.alpenglow) Alpenglow at Maroon Bells, Colorado By John Fowler, Placitas, NM
Mountains or Airborne Particles
In the absence of mountains, an airborne colloidal suspension of particles, called aerosols in the sky opposite the sun can be illuminated in the same way by the remaining red scattered light straddling the border of the Earth′s own shadow, a line on the earth known as the terminator or twilight zone.
An observer on the terminator of such an orbiting body with an atmosphere would experience twilight due to light scattering by particles in the gaseous atmospheric layer. This back-scattered light produces a red band above the horizon opposite the Sun.

The Alpenglow Photo Gallery Go Down Go Up
Alpenglow on San Jacinto Mtns
(m5da-al.20191210.1747) The Alpenglow on San Jacinto Mountains

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