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Information on the subject:
I thought this was the most unusual thing I saw on the Alaskan cruise in the water. These two bodies of water were merging in the middle of the Alaskan gulf and there was a foam developing only at their junction.
I believe this is an example of a Halocline described on Wikipedia en.wikipedia.org/wiki/Halocline
The melting glaciers are fresh water and the ocean has a higher percentage of salt causing the two bodies of water to have different densities and therefore makes it more difficult to mix.
In oceanography, a halocline is cline caused by a strong, vertical salinity gradient within a body of water. Because salinity (in concert with temperature) affects the density of seawater, it can play a role in its vertical stratification. Increasing salinity by one kg/m3 results in an increase of seawater density of around 0.7 kg/m3.
In the midlatitudes, an excess of evaporation over precipitation leads to surface waters being saltier than deep waters. In such regions, the vertical stratification is due to surface waters being warmer than deep waters and the halocline is destabilizing. Such regions may be prone to salt fingering, a process which results in the preferential mixing of salinity.
Originally posted by moosevernel
picture of an undersea lake:
Originally posted by zooplancton
after sailing constantly for 3 years, I was never afforded such a cool phenomenon.
I did get to. witness "glass" conditions in the Indian ocean once.
thanks for sharing!