We all know that the ocean is blue because water absorbs the red part of the light spectrum.
The absence of red makes blue to scatter largely. But some parts of the ocean appears from blue to green.
The reason for it is the most important light-absorbing substance in the oceans is chlorophyll, produced by the phytoplankton.
Due to this green pigment – chlorophyll – phytoplankton preferentially absorb the red and blue portions of the light spectrum (for photosynthesis) and reflect green light.
The study reported in the journal Nature Communications said climate change was already changing the makeup of phytoplankton, and adding to it, the report said that the colour of the oceans and the colour of the blue planet will also change !
Some regions that are greener now, such as near the poles, may turn a deeper hue in the next 80 years, as warmer temperatures brew up more diverse phytoplankton. The study says, the blue regions, such as the subtropics, will turn into darker shades.