Recent research has shown that nowadays the global warming started to affect even the oceans. As the global warming effect rises, the oxygen in the water decreases. According to scientists, the warmer the water, the harder the oxygen gets dissolves leading to not enough oxygen for the oceans, thus for the living plants and animals in the sea.
It was already noticed that parts of the southern Indian Ocean, the eastern Tropical Pacific and the Atlantic, are already less rich in oxygen. This ‘plague’ could reach even larger parts of the oceans between 2030 and 2040.
To understand better, when it’s hotter in the summer , the fish from the tanks stay closer to the surface trying to get more oxygen . Therefore, the solution for a good process of dissolved oxygen are colder waters.
Moreover, the sea water of the oceans has become more acid due to the high concentration of the greenhouse gas carbon dioxide. This also affects the level of oxygen and makes the water less hospitable for every species. According to Dr. Long, oceanographer at the US National Centre for Atmospheric Research in Bouder, Colorado, when the waters are warmer , they are are less dense and less likely to sink. Therefore, they leave no place to the colder water , richer in oxygen, to come to the surface. Where an unusual hot weather occurs , the danger is even higher for the existing fish and sellfish as the oxygen level dramatically drops.
If the marine plants and the phytoplankton are harmed, the photosynthesising becomes harder if not impossible, the other living creatures and every ocean will become greatly endangered.
According to the new map, it seems that by 2100, waters such as the ones off coast of Australia, Southeast Asia and Africa and parts of the South Atlantic , will still have enough oxygen. But at a faster rate, the climate change will certainly take its toll in parts of the Atlantic and northern waters in the Pacific.
Dr. Long came with the conclusion that oceans should be comprehensively observed and thorough research must continue. This way , many other things could be learnt about the oceans and therefore it will be easier to understand to climate change process and how to deal with it. If now it is not enough oxygen for the oceans, maybe it will be in the future.
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