the sea colours?

Question

why is the sea blue in half the world and green the other side??

Answer 1

There are two reasons for the color of the sea; both of them contribute to the answer.


A. The sea reflects the sky.
You have probably noticed that the sea is not very blue-looking when the sky is overcast. Water reflects and scatters the light that strikes it; this is shown by the fact that you can see your reflection in puddles. When the sky is brilliant blue, the sea is also, because it reflects the blue of the sky. A good answer to why the sky is blue has already been posted at MADSci.

B. The sea refracts light just as the sky does.
Blue light is more easily bent, or refracted, than red light; thus, light refracted back from the surface of the sea appears blue. Furthermore, when you are underwater the water around you appears blue because more blue light is scattered back to your eye than red light. Here are some professional shots to show what I mean.
The scattering of light by the air, or by water, is called Rayleigh scattering.

Why is the ocean blue?

The ocean often looks blue because sunlight shines on tiny particles suspended in the water. Along the shores of some areas, however, the water looks green because the blue water is mixed with yellow pigments present in floating plants.

Some oceans exhibit other colors:


The Black Sea looks black because it has little oxygen and a high concentration of hydrogen sulfide.


The Red Sea looks red because it contains seasonal blooms of algae that color the surface water red.


The Yellow Sea looks yellow because it contains a yellow mud carried into it by adjoining rivers.

Answer 2

Green one is close to the shore, while the blue are far and very deep. Sometimes, the color of the sky reflects on the sea water.

Answer 3

It is colourless but seen as blue in most areas, white towards the polar tips. Green - due to algee - but nor all over - very few locations you would see such sight - specially if there is a river flowing to the sea in that area. But If I am correct, there is a season in South African tip where you get greenish water.

Answer 4

Not quite true. The apparent colour of the sea depends on a number of factors including its depth, underlying strata and vegetation, amount of suspended materials, the intensity and angle of the sun, etc.

Answer 5

its not the sea actually its the vegetation growing in water that gives it the color and the reflction of the sky makes the other part blue

Answer 6

Where sea is to deep,there with sea color it's blue,and where,it's not deep there with Bush's etc.down in water color looks green, so mostly it deepened on deepness and under ground basis.

Answer 7

i'm living near rome,and where i go,sea color is brown!!!ooops,can you explain it too???

Answer 8

the algea

Answer 9

polluting I think

Answer 10

Why not?