MIT study warns that sea will change color due to climate change


Due to climate change, at the end of the century, much of the sea will have changed color.

According to a study by the Massachusetts Institute of Technology (MIT), marine phytoplankton, the microscopic algae responsible for the green portion of the water, affected its life cycle, composition and distribution, due to climate change.

These bodies They use chlorophyll to synthesize solar energy, hence the green portion of the water.

In an article published in Communications of nature, the researchers explain that developed a model that simulates the growth and interaction of different phytoplankton speciesand how the mix of species in various places will change as temperatures rise around the world.

With global warming, the seas will continue to be bluish or greenish, but with new shades. The change of color is indicative of a chain of changes in marine life.

The scientists found that, by the year 2100, more than 50% of the world's oceans will change color due to this climatic phenomenon. These changes will be very subtle, it is likely that the human eye will not see them, but the optical sensors do.

"Changes induced by heating are causing less nutrients to reach the surface layerTherefore, phytoplankton is more likely to decline in many parts of the ocean, "said Stephanie Dutkiewicz, a MIT researcher and lead author of the study.

According to the researcher, temperatures also affect the rapidity with which phytoplankton grows. He explained that species adapted to hot water grow much faster than others adapted to cold water, so there will be regional changes in the composition, quantity and distribution of marine micro-organisms that color water.

"The sea will remain blue. Some regions to the north and south of the equator and the subtropical turns may possibly be bluer. Green will become more present in polar waters and tropical coastal waters, where phytoplankton brings more heat, "he says.

Scientists also recognize that In order to better match the color of the sea in the future, it will be necessary to include other microscopic constituents of sea water, such as bacteria, minerals and sea salinity.

Sea plants need, in addition to the sun, nutrients such as nitrogen or phosphorusIf ocean circulation is retarded by global warming, these nutrients will not reach the surface.


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