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Old 24-09-2016, 21:41   #31
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Re: Is the ocean blue or green?

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Originally Posted by tuffr2 View Post
Interesting yesterday I was at the ocean and it looked green. I was at the ocean a few days earlier and it looked blue. Do see the same two colors or am I losing it?

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The following quote from "Beneath the Surface; tales of a sailing marine biologist" may shed some light on the subject.

But why are the sea and the sky blue? The most commonly held belief is that the sea reflects the colour of the sky and this is partly true – the water reflects and scatters the light that strikes it making it possible, for example, to see the reflection of a tree in a lake. But the sea is still somewhat blue even when the sky is gray and, while swimming underwater, the water around you still appears blue. So, something else is having a greater effect. In fact, the sea appears blue for the same reason that the sky appears blue.

In a very narrow band of wavelengths between longer ones (such as microwaves and infrared waves) to shorter ones (x-rays and ultraviolet), the human eye can only see wavelengths of red, orange, yellow, green, blue, indigo and violet – the colours of the spectrum and the rainbow. All of these colours mixed together make up what we see as white light. But when white light from the sun hits the very small molecules in air, the various colours are selectively absorbed and scattered – smaller wavelength colours at the blue end of the spectrum are absorbed and radiated more readily than those at the red end of the spectrum. It is this radiated and scattered light that gives the sky its blue colour and the effect is called Rayleigh scattering after the physicist who first described it in the 1870's.

And the same effect works in the sea. As white light enters the sea the individual colours are selectively absorbed so that the warmer, longer wavelengths, starting with red, disappear first leaving a predominance of colours at the cooler, blue end of the spectrum and the light reflected back from the surface of the sea appears blue. Even in shallow water, a white dinner plate will appear to be light blue because the longer wavelengths of light at the red end of the spectrum have been absorbed.
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Old 24-09-2016, 23:15   #32
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Re: Is the ocean blue or green?

Everybody knows Columbus sailed the ocean blue in 14hundred and92..

I was born in Green Bay, very much green and gold !

And of course we have the Red Sea.

The waters all the colors o the rainbow....
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Old 25-09-2016, 03:41   #33
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Re: Is the ocean blue or green?

yes billgewater cairns marina is very busy / we are in the pioneer river mackay / which is blue except for storm water run off / mackay marina is 8 k's from here/ also very busy you can see the bottom most of the time / the overlooking walkway venues usually full of happy people / those that can't afford the lifestyle time wise probably see green
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Old 25-09-2016, 03:53   #34
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Re: Is the ocean blue or green?

Got to agree with thruska. Columbus did sail the 'Ocean Blue'.

Fyi...I was looking at the Atlantic Ocean from A1A in north Florida. Most of the time I see blue but once in awhile I see green. Same spot but probably different times of the day.

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Old 25-09-2016, 08:25   #35
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Re: Is the ocean blue or green?

How this for mud in icw in Texas
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Old 25-09-2016, 17:08   #36
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Re: Is the ocean blue or green?

When I feel well it looks blue. When I do not feel so good, it looks green. I am not sure whether it is the ocean or me.
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Old 25-09-2016, 18:14   #37
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Re: Is the ocean blue or green?

Homer and Lou Reed mention the wine dark sea, I imagine not a white wine though.
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Old 26-09-2016, 00:19   #38
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Re: Is the ocean blue or green?

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Originally Posted by Hudson Force View Post
Sometimes it's like this:

Homer's Wine red sea...
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Old 26-09-2016, 00:50   #39
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Re: Is the ocean blue or green?

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Originally Posted by jkindredpdx View Post
Homer's Wine red sea...
And sometimes it's both red and blue
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Old 26-09-2016, 13:44   #40
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Re: Is the ocean blue or green?

Absolutely beatiful pictures.

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Old 26-09-2016, 14:44   #41
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Re: Is the ocean blue or green?

I guess it is the color you see and when and your enjoyment.
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Old 26-09-2016, 15:41   #42
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Re: Is the ocean blue or green?

Some of you might find the discussion in this thread interesting.

International Orange? Safety Yellow?
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Old 26-09-2016, 18:08   #43
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Re: Is the ocean blue or green?

To me, offshore, it is always shades of deep blue except on rainy days it looks near grey.

I did not notice any differences between Atlantic, Pacific and Indian.

I have never seen green ocean. Must be where rivers and other fresh water mixes up with ocean water.

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Old 26-09-2016, 19:41   #44
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Re: Is the ocean blue or green?

I saw the green water from about 10 feet above the shore line along the roadway. On other days on the same roadway the ocean looks blue.

This was along A1A in north Florida.

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Old 26-09-2016, 19:50   #45
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Re: Is the ocean blue or green?

Alaska
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