In 80 years, the color of the ocean may be different
Water molecules on their own are able to absorb most of the light spectrum of sunlight, with the exception of the blue part—which is why mostly-barren swaths of the open ocean look blue in satellite images taken from space. But when there are phytoplankton in the water, they absorb and reflect back different wavelengths of light, hence the green coloring in certain areas of the oceans. Previous models looked at estimates of chlorophyll—which is contained in the phytoplankton—in the water, which can vary depending on ocean currents and isn’t a particularly good indicator of differences impacted by the changing climate.
Source: qz.com