CLIMATE CHANGE WILL DEPLETE OCEAN OXYGEN AND KILL FISH

Posted by: chaamjamal on: February 5, 2022

In: Uncategorized
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LINK TO SOURCE: https://news.yahoo.com/climate-change-will-deplete-ocean-oxygen-kill-fish-studies-show-182130028.html#:~:text=Climate%20change%20is%20going%20to,life%20depend%20on%20to%20survive.&text=The%20study’s%20models%20show%20deoxygenation,that%20deoxygenation%20may%20be%20irreversible.

PART-1: WHAT THE SOURCE ARTICLE SAYS

Climate change will deplete ocean oxygen, kill fish, studies show. Climate change is going to wreak havoc on the world’s oceans, according to two new studies, depleting the warming waters of the oxygen that fish and other sea life depend on to survive. By 2080, around 70 percent of the oceans on the planet will suffer from a lack of oxygen due to warmer temperatures, a study published in November by researchers with the American Geophysical Union’s journal Geophysical Research Letters concluded. The study finds that substantial deoxygenation of the middle ocean depths, where a large percentage of the fish that people eat are found, began occurring in 2021. Oceano Dunes, south of Pismo State Beach in California is actually very important to us because a lot of commercial fish live in this zone,” Yuntao Zhou, an oceanographer at Shanghai Jiao Tong University and lead author of the study, said in a statement. The study’s models show deoxygenation will begin affecting all ocean depth zones by 2080, and that deoxygenation may be irreversible. Even if humans stopped emitting greenhouse gases and reversed global warming by sucking carbon dioxide from the air, the question of “whether dissolved oxygen would return to pre-industrial levels remains unknown,” Zhou said. This underscores the importance of halting climate change — and the resulting ocean deoxygenation — as quickly as possible, according to scientists. The reason for the declining oxygen levels in oceans is that warmer waters hold less dissolved oxygen and ocean temperatures are rising at an alarming rate. According to another new study released this week and published in the scientific journal PLOS Climate, a majority of the world’s ocean surface has consistently exceeded the normal range since 2014. High water temperatures threaten ecosystems such as coral reefs and kelp forests, which fish feed on. Researchers from the Monterey Bay Aquarium in Monterey, Calif., mapped 150 years of sea surface temperatures to establish the normal temperature ranges. They found that 2014 was the first year in which a majority of ocean surface areas went above what would normally be considered an extremely hot temperature by historical standards. That benchmark has been surpassed every year since then, making what was once extreme heat the new normal. There are dead and dying coral underwater in the Maldives. Some parts of the Maldives are believed to have lost up to 90 percent of corals because of changing conditions such as rising sea water temperature. There were dead and dying coral off the island of Huraa in 2019 near Malé, Maldives. Climate change is not a future event. The reality is that it’s been affecting us for a while. Research shows that for the last seven years more than half of the ocean has experienced extreme heat. While heat in and of itself threatens marine life, declining oxygen levels add an additional danger, and the middle ocean depths are most vulnerable because they do not have additional sources of oxygen. The ocean surface absorbs oxygen from the atmosphere, and the lowest sea depths gain oxygen from the decomposition of algae. But the ocean’s middle depths, which are from about 600 feet to 3,300 feet below the surface and are called mesopelagic zones, will be the first area to lose large amounts of oxygen because they do not get oxygen from either of those sources. They are also home to many of the world’s commercially fished species, including tuna, swordfish and anchovies. Losing those fish species to deoxygenation could devastate fishing-based economies and cause shortages of seafood for communities that rely on it. Deoxygenation affects other marine resources as well, but fisheries are maybe most related to our daily life,” Zhou said. The researchers also found that oceans closer to the poles, where warming is occurring faster, are also losing oxygen more quickly. Global temperatures are on the rise and have been for decades.

Dead and dying coral underwater in the Maldives. Some parts of the Maldives are believed to have lost up to 90 percent of corals because of changing conditions such as rising sea water temperature.

PART-2: CRITICAL COMMENTARY

TO RAISE THE ATMOSPHERE’S TEMPERATURE BY 1C, THE GREENHOUSE EFFECT WOULD HAVE TO TRAP ABOUT 6E21 JOULES OF ENERGY. IF THE ATMOSPHERE COULD GIVE UP THAT ENERGY TO THE DEEP OCEAN, THERE WOULD BE NO GLOBAL WARMING ON THE SURFACE, BUT THE DEEP OCEAN WOULD WARM BY 0.001C. THE ATMOSPHERE’S ABILITY TO CAUSE MAJOR TEMPERATURE CHANGES IN THE OCEAN IS RELATIVELY WEAK BUT THE OCEAN HAS ACCESS TO THE OCEAN’S GEOTHERMAL HEAT AND ITS ABILITY TO WARM ITSELF AS WELL AS THE ATMOSPHERE ARE SIGNIFICANT AS SEEN IN THE PALEO DATA FOR THE PETM PRESENTED IN A RELATED POST: LINK: https://tambonthongchai.com/2018/10/28/petm/

PUT ANOTHER WAY, THE ABILITY OF THE ATMOSPHERE TO TRAP SOLAR ENERGY WITH THE GREENHOUSE EFFECT TO CAUSE SIGNIFICANT CHANGES TO THE OCEAN’S TEMPERATURE IS NOT CREDIBLE. WE SHOULD ALSO CONSIDER THAT THE ATMOSPHERE AND OCEAN TAKEN TOGETHER WEIGH 1.36E18 TONNES OF WHICH THE OCEAN IS 99.62% AND THE ATMOSPHERE 0.28%. THE NOTION THAT THE ATMOSPHERE CAN TRAP HEAT WITH THE GREENHOUSE EFFECT AND CAUSE SIGNIFICANT TEMPERATURE CHANGES TO THE OCEAN IN ADDITION TO CAUSING GLOBAL WARMING ON THE SURFACE WHERE THE GLOBAL WARMING ENERGY BALANCE USES UP ALL THE TRAPPED ENERGY TO EXPLAIN GLOBAL WARMING, IS AN EXTREME CASE OF THE ATMOSPHERE BIAS OF CLIMATE SCIENCE DESCRIBED IN RELATED POSTS ON THIS SITE LINKED BELOW.