Our Oceans Are Losing Oxygen At A Shocking Rate

  • Our Oceans Are Losing Oxygen At A Shocking Rate

Our Oceans Are Losing Oxygen At A Shocking Rate

The number of areas in the global ocean depleted of oxygen, or anoxic waters, has quadrupled, the report found.

The ocean absorbs approximately a quarter of all fossil fuel emissions, but as global energy demand continues to grow, there is a fear that the world's seas will reach a saturation point.

This MPGCA Action event entitled Oceans and Coastal Zones Climate Action towards 1.5C pathways, is organized by the Future Ocean Alliance (FOA), the Global Ocean Forum (GOF), the International Union for the Conservation of Nature, the Intergovernmental Oceanographic Commission (IOC) of UNESCO, and the Alliance of Small Island States (AOSIS).

Species like jellyfish want low-oxygen areas, but low-oxygen sensitive ones, including most fish, don't. This warmer water holds less oxygen and scientists estimate that between 1960 and 2010, the amount of gas dissolved in the oceans declined by 2 per cent.

IUCN appearing director common, Dr Grethel Aguilar, mentioned: 'With this report, the dimensions of harm local weather change is wreaking upon the ocean comes into stark focus.

Oceans are expected on current trends to lose 3.0-4.0 percent of their oxygen globally by 2100.

According to the study, about 50 percent of oxygen loss in the upper part of the ocean is a result of temperature increase.

The report went on to say that deoxygenation is now altering the stability of marine life because it favours the species which don't require as a lot oxygen to thrive.

The threat to oceans from nutrient run-off of chemicals such as nitrogen and phosphorus from farms and industry has always been known to impact the levels of oxygen in the sea waters and still remains the primary factor, especially closer to coasts. Communities may have a reduced catch or are forced to spend more to obtain the affected species-impacts that threaten not only nutrient loss but cultural loss.

Oceans are expected to lose up to four per cent of their oxygen by the end of the century and the report warns that the ripple effect could prove costly for millions of people.

"Ocean oxygen depletion is menacing marine ecosystems already under stress from ocean warming and acidification".

This week, the World Meteorological Organization said that because of the growth of human-made emissions, the ocean was now 26% more acidic than before the revolution industrial.

"To stop the worrying expansion of oxygen-poor areas", he continued, "we need to decisively curb greenhouse gas emissions as well as nutrient pollution from agriculture and other sources".

World leaders will gather in Marseille in June for the IUCN's World Conservation Congress.

"Decisions taken at the ongoing [2019 United Nations Climate Change Conference in Madrid] will determine whether our ocean continues to sustain a rich variety of life, or whether habitable, oxygen-rich marine areas are increasingly, progressively, and irrevocably lost", Epps added.

Policymakers are now in negotiations at the COP25 climate summit in Madrid charged with ratifying a comprehensive rulebook for the 2015 Paris accord.