Oxygen Level in the Marine Are Dropping, and It Is All Because of Us

The level of oxygen in our oceans has dropped in the last half century, and human activity including burning fossil fuels and dumping fertilisers in the sea will be to blame, based on a new study.

The level of oxygen in our oceans has dropped in the last half century, and human activity including burning fossil fuels and dumping fertilisers in the sea will be to blame, based on a new study.

Researchers examined five decades of data in the most comprehensive survey of ocean oxygen amounts ever carried out and found the total amount of oxygen in the planet 's oceans has reduced by 2 percent.

"While the minimal decrease of oxygen in the atmosphere is considered non-critical, the oxygen reductions in the ocean may have far-reaching consequences due to the uneven distribution," explains oceanographer Lothar Stramma.

"For fisheries and coastal economies this process could have harmful consequences."

Hundreds of thousands of historic and contemporary ocean oxygen measurements were joined for the brand new research, including data from distant regions and the deep sea where detailed recordings are less simple to obtain – the lowest layer of the ocean –.

"We were able to document the oxygen distribution and its changes for your ocean for the first time," says another of the team, Sunke Schmidtko.

"These numbers are a vital prerequisite for enhancing predictions for the ocean of the future."

As temperatures rise across the planet, a chemical reaction is kicked off by the procedure below the sea: warmer water is less efficient at trapping gases like oxygen, which means it escapes into the atmosphere.

Warmer water is also lighter and expands more, so less oxygen is making its way down to the lower depths of the ocean.

On top of the overall drop in oxygen levels, the researchers discovered the quantity of water with no oxygen in it has quadrupled since 1960.

Each of this is terrible news for anything that lives underneath the sea, and our planet's finely balanced ecosystem as a whole.

More regions of the ocean will probably become uninhabitable, the researchers predict, which leads to fragmented additional pressure on underwater species and zones of life as the occurrence continues.

The researchers warn that "far-reaching implications for marine ecosystems and fisheries can be expected", and based on the prevailing trend, estimate a further fall in the oxygen level of between 1 to 7 percent between now and 2100.

It's another example of why we must get a hold on climate change asap in the event the team's forecast is right.

As we have seen from things like world's inadvertent use of the ocean as a rubbish tip, the damage we cause to global waters might get a knock-on effect on us – whether that's through adding toxins into the food chain, or heating oceans changing global weather patterns.

The good thing here is that scientists finally have more data than before to find out what's going on, and how we should react - and also the investigations don't cease here.

"We hope to get additional data on regional development that will also help us to better understand the international tendencies," says Stramma.