CLIMATE RISING AND FALLING STATE OF HYDROSPHERIC OXYGEN LEVEL: A GRIM GLOBAL CONCERN

Abstract

Though humans' basic needs are prioritized first, health and environment quality are equally important. Environmental issues are based on a variety of factors. One of these is the rising temperature and consequent decrease in oxygen levels in water bodies such as lakes, oceans, and seas. The right amount of oxygen is essential for life on Earth because it serves as a lifeline for living organisms; it could jeopardize marine ecosystems, shifting habitat conditions, human health, and the environment as a whole. The data for this study were primarily gathered from secondary sources such as books, government offices, research articles, and websites published at various times. According to research, the primary cause of marine oxygen loss is human-caused global warming. Human beings also play a role in coastal regions by depositing wastes in the water bodies, moreover it is difficult to avoid this completely. Most significant drops in oxygen levels have been noticed in the equator and the Arctic Ocean. The spatial distribution and pattern of low or no oxygen across the globe is the focus of this review article. It also goes over the reasons for unequal oxygen loss in different parts of the world. Introduction According to the most recent and comprehensive research of Oxygen Changes in the World's Oceans, total global oxygen concentration has decreased by 2% on an average between 1960 and 2010. (Laffoley and Baxter, 2019).Climate change is considered to be a key cause to this "deoxygenation," since it affects the quantity of oxygen that seawater can contain as well as the circulation patterns that deliver oxygen-rich water to deeper oceans. There are pockets of little or no oxygen all around the planet, including sections of the tropical oceans off the coasts of California, Peru, and Namibia, as well as the subterranean waters of the Arabian Sea. Most marine life will perish since the oxygen levels in these places are so low. Nitrous oxide (N O), a strong greenhouse gas, can be released 2 in low oxygen zones (Schmidtko S, Stramma L, Visbeck M., 2017). This paper aims to demonstrate how the rising temperature of the climate affects the level of oxygen in the hydrosphere. The world is now more than 1°C warmer than before industrialization, and it is on track to be 3 degrees warmer in the near future. Compared to natural processes that affect climates, such as solar fluctuation and volcanic eruptions, human actions, primarily the burning of fossil fuels and deforestation, have contributed to climate change over the last 50 years. According to NASA and the National Oceanic and Atmospheric Administration's alarming new analysis, the amount of heat trapped by the Earth has doubled in just 15 years. According to researchers, it's a massive amount of energy that's already having far-reaching effects. According to NASA scientist Norman Loeb, the planet is absorbing too much energy, which will result in higher temperatures and more melting of snow and sea ice, as well as a rise in sea level. Scientists discovered that the Earth is 1* 1 Mohammad Afsar Alam and Mumtaz Alam