What determines how much sunlight a region receives?

What determines how much sunlight a region receives?

In the absence of air factors, the amount of solar energy received at Earth's surface is determined by the duration of the daylight period and the course of the Sun across the local sky. 22. In most regions of the world, the amount of sunlight reaching the ground varies by day and from year to year as well. During the night, clouds block out some light, while other lights such as stars shine through cloud cover.

The variation in daylight hours is due to the fact that the Sun is surrounded by a large atmosphere called the "Earth's Cloud Cover". As light waves travel through this atmosphere they are sometimes scattered by particles inside it or caught by clouds floating in its direction. When this happens, the light appears to come from another place, so when we look up at the sky we don't see all of the stars visible from down here on Earth.

Another factor that affects how much sunlight reaches the ground is the location of the Sun in relation to the Earth. If it is very high in the sky then more of the Sun's rays are blocked out by the horizon than if it is low in the sky. This is because as the angle between the Sun and the Earth increases, more of the Sun's rays reach straight down rather than being bent by the Earth's atmosphere.

How much of the sun’s radiation is visible on Earth?

On clear days, approximately 40% of the solar energy received at the earth's surface is visible radiation in the spectral range of 0.4 to 0.7 mm, whereas 51% is infrared radiation in the spectral range of 0.7 to 4 mm. The total radiation released by the sun in a given unit of time is almost constant. However, because some parts of the spectrum are absorbed or scattered out of view before they have a chance to affect life on Earth, the actual rate of energy release varies over time.

In addition to heat, sunlight is also responsible for a large part of the oxygen that we breathe every day. When light hits water, it breaks it down into hydrogen and oxygen molecules. The presence of these gases indicates that this process is still going on today, even though more rapidly produced chemicals such as iron oxides or sulfur compounds are also found in natural waters. This shows that sunlight is essential for the survival of living organisms!

The amount of visible light that reaches the earth's surface depends on how much cloud cover there is between it and the sun. If all clouds were removed, then only 35% of the sun's energy would be visible. But most of the time, clouds play an important role in protecting us from excessive heat by reflecting away much of the sunlight before it has a chance to cause any damage.

What affects the amount of sunlight that reaches the planet?

Reflectivity The quantity of sunlight that reaches the Earth's surface is controlled by the reflectivity of the surface, the angle of the Sun, the output of the Sun, and the cyclic fluctuations in the Earth's orbit around the Sun. Reflectivity can be increased by weather or climate events that increase the absorption of light waves, such as clouds or snow/ice. Or it can be decreased by events that cause bright spots or dark areas, such as volcanoes or deserts. The average global reflectivity is about 15%.

Angle The distance between the Earth and the Sun varies throughout its orbit, causing different parts of its surface to experience darkness or full daylight. On midsummer days in the Northern Hemisphere, the Sun is high in the sky, almost directly above the horizon, which means it doesn't go down at all. In the Southern Hemisphere, the Sun goes down until it reaches the southern horizon, where it comes up again on the opposite side of the Earth a few months later.

Output The output of the Sun depends on how far away it is from the Earth and what type of star it is. The farther away it is, the less intense its light is. And the bigger it is, the more intense its light is. The Sun is a huge ball of gas that generates heat because the atoms that make up its atmosphere vibrate when they receive photons (the name for bundles of light).

How many hours of sunlight do we get per day?

The amount of sunshine may be divided into three categories: The yellow bars represent the amount of hours of sunshine received by latitude on the current date, which is the default view. The number of daylight hours each day ranges from 0 to 24, but most latitudes get 9 to 15 hours. Latitudes that are closer to the equator will see more hours of daylight in summer and less in winter.

In addition to this daily variation, the total yearly amount varies based on the position of the Earth around the Sun. Days are longer near the Equator and shorter near the Poles. This results in a difference of almost four weeks between the longest and shortest days of sunlight observed anywhere on Earth.

The average daily amount of direct sunlight at any given location is called the solar irradiance. The solar irradiance changes throughout the year as well as across the surface of the planet. It is highest in the middle of the day in the northern hemisphere when the sun is directly over the horizon, and it is lowest at sunrise and sunset when the sun is not yet over the horizon.

At noon in the northern hemisphere, the solar irradiance is about 1,360 watts per square meter (W/m2). This amount increases toward midnight when the sun has moved southward, reaching a maximum value of 3,330 W/m2 at 2 a.m. In the southern hemisphere, these numbers change significantly.

About Article Author

Marie Braden

Marie Braden is currently a biologist for one of the most prestigious research institutions in the country, where she applies her knowledge of genetics to improving crop yield. Marie loves being able to help people through her work, which is why she also does outreach for an environmental organization dedicated to preserving biodiversity around the globe.


BrownfieldSummit.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.

Related posts