With depth, the intensity of sunlight drops fast. The depth of the water influences not just the colors of light seen underwater, but also the intensity, or quantity of light.
In an open ocean, sunlight may penetrate up to a depth of 200 to 300 meters below sea level if it falls on the water surface.
The ocean body is separated into three segments depending on the depth to which sunlight may penetrate. The following are the details:
The first zone is the euphotic zone
sometimes known as the sunshine zone. It reaches a depth of almost 200 meters below sea level. The majority of commercial fisheries are found in this stratum, as well as many other marine species such as turtles.
Below the euphotic zone, this zone exists. It extends from 200 to 1000 meters below sea level in vertical depth. Because of the larger depth, the quantity of light diminishes dramatically. Due to the lack of sunshine, the process of photosynthesis does not take place here.
The Midnight (Aphotic) zone
is the deepest section of the ocean, where there is no light and it is completely dark. This zone is found below 1000 meters, and it is here that incredibly sophisticated types of creatures may live and thrive under great pressure.
As a result, as the depth of the water increases, the quantity of light diminishes.
With depth, the intensity of sunshine gradually diminishes. The intensity, or quantity of light, is affected by the depth of the water, as well as the hues of light that are visible underwater.
Depending on the condition of the water, a certain portion of incoming light is reflected away as it reaches the ocean surface. Less light will be reflected if it is quiet and smooth. More light will be reflected if the water is agitated and there are numerous waves.
Sunlight comprises all of the hues of the spectrum, from violet to red, on land and above the ocean’s surface, each with its own wavelength. When you go underwater, though, the light changes swiftly. Clear ocean water absorbs all colors except blue by around 20 to 30 meters below the surface.
Ocean Currents and the Sun’s Energy
Parts of the waters are warmed by the sun. Warm water rises in the same way as warm air does. As the temperature of the ocean rises in one location, colder ocean waters from another area will come in to replace the warmer ocean waters, resulting in our ocean currents.
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