Quantcast
Environmental News for a Healthier Planet and Life

Help Support EcoWatch

Scientists Link Southern Ocean's Rapid Warming to Human Activity

Oceans
Scientists Link Southern Ocean's Rapid Warming to Human Activity
PxHere

In the past few decades, the Southern Ocean surrounding Antarctica has gotten less salty and has warmed at roughly twice the rate of global oceans overall.

Now, in a new study, scientists found convincing evidence that these trends are the result of two human influences: climate change from greenhouse gas emissions and the depletion of the ozone layer.


The research, published this week in the journal Nature Geoscience, was authored by scientists from Environment and Climate Change Canada and the Scripps Institution of Oceanography in California.

Using climate models, data from the Argo global network of floating ocean sensors and past records, the researchers determined that Antarctica's warming and freshening waters are directly linked to ozone depletion and greenhouse gas emissions, as opposed to natural variabilities.

This is the first time such a connection has been found specifically for the Southern Ocean, lead author Neil Swart of Environment and Climate Change Canada told Canada's National Observer.

"While the influence of ozone depletion and greenhouse gas increases on the Southern Ocean have been suggested for some time, our research provides the evidence that links the observed changes to these mechanisms, and defines their relative importance," Swart said in a press release for the study.

The 1987 Montreal Protocol, an international effort to ban chlorofluorocarbons, has led to significant recovery of the Antarctic ozone hole. On the other hand, global greenhouse gas emissions from fossil fuels and other industries have risen dramatically since the industrial revolution.

"Moving forward, the ozone layer is recovering while greenhouse gases are continuing to increase, leading to opposing trends," Swart added. "Our work suggests that greenhouse gases are more important than ozone in determining Southern Ocean trends."

As so-called "carbon sinks," our oceans are key to mitigating the effects of climate change. The Southern Ocean is one of the most prolific carbon sinks, taking in nearly half the total amount of anthropogenic CO2 absorbed by the world's oceans.

But as the ocean's ability to absorb CO2 decreases, global temperatures could increase and lead to greater weather extremes such as heat waves and stronger precipitation events, Swart explained to the National Observer.

"It is vital to understand changes in the Southern Ocean because it is a key region of global heat and carbon uptake, and it underlies ice sheets with many meters of sea-level rise potential," Swart said in the press release.

Eating lots of fruits and vegetables will boost the immune system. Stevens Fremont / The Image Bank / Getty Images

By Grayson Jaggers

The connection between the pandemic and our dietary habits is undeniable. The stress of isolation coupled with a struggling economy has caused many of us to seek comfort with our old friends: Big Mac, Tom Collins, Ben and Jerry. But overindulging in this kind of food and drink might not just be affecting your waistline, but could potentially put you at greater risk of illness by hindering your immune system.

Read More Show Less

EcoWatch Daily Newsletter

A graphic shows how Rhoel Dinglasan's smartphone-based saliva test works. University of Florida

As the world continues to navigate the line between reopening and maintaining safety protocols to slow the spread of the coronavirus, rapid and accurate diagnostic screening remains critical to control the outbreak. New mobile-phone-based, self-administered COVID-19 tests being developed independently around the world could be a key breakthrough in making testing more widely available, especially in developing nations.

Read More Show Less

Trending

A meteorologist monitors weather in NOAA's Center for Weather and Climate Prediction on July 2, 2013 in Riverdale, Maryland. Mark Wilson / Getty Images

The Trump White House is now set to appoint two climate deniers to the National Oceanic and Atmospheric Administration (NOAA) in one month.

Read More Show Less
A plastic bag caught in a tree in New Jersey's Palisades Park. James Leynse / Stone / Getty Images

New Jersey is one step closer to passing what environmental advocates say is the strongest anti-plastic legislation in the nation.

Read More Show Less

Did you know that nearly 30% of adults do, or will, suffer from a sleep condition at some point in their life? Anyone who has experienced disruptions in their sleep is familiar with the havoc that it can wreak on your body and mind. Lack of sleep, for one, can lead to anxiety and lethargy in the short-term. In the long-term, sleep deprivation can lead to obesity, diabetes, and cardiovascular disease.

Fortunately, there are proven natural supplements that can reduce insomnia and improve quality sleep for the better. CBD oil, in particular, has been scientifically proven to promote relaxing and fulfilling sleep. Best of all, CBD is non-addictive, widely available, and affordable for just about everyone to enjoy. For these very reasons, we have put together a comprehensive guide on the best CBD oil for sleep. Our goal is to provide objective, transparent information about CBD products so you are an informed buyer.

Read More Show Less

Support Ecowatch