Published: Sun, January 13, 2019
Sci-tech | By April Francis

Oceans warming faster than expected

Oceans warming faster than expected

Though a warmer ocean might make for a more pleasant swim, it carries deadly consequences.

The world's oceans are rising in temperature faster than previously believed as they absorb most of the world's growing climate-changing emissions, scientists said Thursday.

"Ocean heating is a very important indicator of climate change, and we have robust evidence that it is warming more rapidly than we thought".

Ocean temperatures are less influenced by year-to-year variations in the weather.

The oxygen content in the world's oceans has decreased since 1960, an average of more than two percent, found a study at the Geomar Helmholtz centre for ocean research in the year 2017.

This thermal expansion will lead to a temperature rise of 0.78 degrees Celsius by the end of the century - raising sea levels a foot (30cm) on top of that caused by melting glaciers and ice sheets.

The authors also note that warmer oceans mean stronger storms, hurricanes, and precipitation.

Cheng explained that oceans are the energy source for storms, and can fuel more powerful ones as temperatures - a measure of energy - rise.

By taking up about 93% of the Earth's energy imbalance created by increasing heat-trapping gases in the atmosphere from human activities, the oceans are the main memory of climate change.

The four studies, published between 2014 and 2017, provide better estimates of past trends in ocean heat content by correcting for discrepancies between different types of ocean temperature measurements and by better accounting for gaps in measurements over time or location.

"If you want to see where global warming is happening, look in our oceans", Zeke Hausfather, a UC Berkeley graduate student and co-author of the research paper, said in the blog post. "That was a problem, because of all things, that is one thing we really hope the models will get right".

The system uses nearly 4,000 drifting ocean robots that dive to a depth of 2,000 metres every few days, recording temperature and other indicators as they float back to the surface.

The latest findings disprove, therefore, previous reports that the warming in the past few years, have exposed.

For the new study, scientists used data collected by a high-tech ocean observing system called Argo, an global network of more than 3,000 robotic floats that continuously measure the temperature and salinityof the water.

"Scientists are continually working to improve how to interpret and analyze what was a fairly imperfect and limited set of data prior to the early 2000s", Hausfather said in the v. The second scenario assumes no change in emissions and projects warming that could severely affect ocean ecosystems and sea levels.

The planet is "clearly warming", according to the analysis.

But scientists say that boom will be short-lived as lobsters continue on to Canada.

Like this: