Unbelievable Sunrise

by Robert Bales

Title

Unbelievable Sunrise

Artist

Robert Bales

Medium

Photograph - Photo

Description

I have been waiting for the clouds and this morning we had a weather change and the clouds were forming. I knew where there was a great looking silhouettes that I was going to use for background. I thought the palm trees and the mountains would make a great reflection in the water trap on the golf course. Mother Nature really put on a great show for the sunrise.
Here in the Southwest sunsets seems to this color of red during the Fall months and the first part of winter.
The timing of sunrise varies throughout the year and is also affected by the viewer's longitude and latitude, altitude, and time zone. These changes are driven by the axial tilt of Earth, daily rotation of the Earth, the planet's movement in its annual elliptical orbit around the Sun, and the Earth and Moon's paired revolutions around each other. The analemma can be used to make approximate predictions of the time of sunrise.I n late winter and spring, sunrise as seen from temperate latitudes occurs earlier each day, reaching its earliest time near the summer solstice; although the exact date varies by latitude. After this point, the time of sunrise gets later each day, reaching its latest sometime around the winter solstice. The offset between the dates of the solstice and the earliest or latest sunrise time is caused by the eccentricity of Earth's orbit and the tilt of its axis, and is described by the analemma, which can be used to predict the dates.
Variations in atmospheric refraction can alter the time of sunrise by changing its apparent position. Near the poles, the time-of-day variation is exaggerated, since the Sun crosses the horizon at a very shallow angle and thus rises more slowly.
Accounting for atmospheric refraction and measuring from the leading edge slightly increases the average duration of day relative to night. The sunrise equation, however, which is used to derive the time of sunrise and sunset, uses the Sun's physical center for calculation, neglecting atmospheric refraction and the non-zero angle subtended by the solar disc.

Uploaded

November 23rd, 2013

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