The effect of increasing altitude is the same at practically all latitudes on Earth: It makes the hours of daylight longer, and it makes the sun rise earlier and set later than it would if that location were at sea level. That is, two minutes of daylight are added for every 4,921.3 feet of altitude.
Does elevation affect sunrise time?
The variation with altitude is approximately linear, and so we conclude that sunset is later by 1 minute for every 1.5 kilometres in altitude, and that sunrise is earlier by the same amount.
What determines sunrise time?
Sunset and sunrise have exactly the same definition: the time when the apparent uppermost ray of the Sun is on the astronomical horizon. If it is the first ray, it is sunrise and if it is the last ray, it is sunset. (For a viewer on Earth, where the ocean seems to touch the sky defines the horizon.)
Why do days get longer?
Actually, though, the Earth is tilted 23.4 degrees! (A circle is 360 degrees.) This tilt is the reason that days are longer in the summer and shorter in the winter. The hemisphere thats tilted closest to the Sun has the longest, brightest days because it gets more direct light from the Suns rays.
Is there any light before sunrise?
In its most general sense, twilight is the period of time before sunrise and after sunset, in which the atmosphere is partially illuminated by the sun, being neither totally dark or completely lit. However there are three categories of twilight that are defined by how far the sun is below the horizon.
Why does it get dark so early in Colorado?
The reason why this week is home to the earliest sunsets of the year is due to the solar noon, or the exact time of the suns highest point in the sky. The solar noon gets later in the day in December, despite the days themselves shortening until the winter solstice on the Dec. 21.