Ocean temperatures are rising far faster than previously thought, report says

Ocean temperatures are rising far faster than previously thought, report says

These robots measure ocean temperature, salinity, and pH.

The paper says that in a scenario where no effort is made to reduce greenhouse gas emissions, the Coupled Model Intercomparison Project 5 (CIMP5) models predict that the top 2,000 meters of oceans will see a temperature rise of 0.78-degrees Celsius by the end of the century.

The new analysis, published in Science, shows that trends in ocean heat content match those predicted by leading climate change models, and that overall ocean warming is accelerating. Emissions in the United States jumped 3.4 percent past year from 2017 - the second-largest annual increase in more than two decades, according to a preliminary estimate by the economic research company Rhodium Group. "Ocean heating is a very important indicator of climate change, and we have robust evidence that it is warming more rapidly than we thought". The fallout could include rising sea levels, destruction of corals, severe weather systems and a decrease in ice sheets and glaciers.

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. And warming oceans lead to a lot of other dire consequences, some immediately felt by humans and other creatures, and some more generally destructive to life as we've long known it.

A key factor in the more accurate numbers is an ocean monitoring fleet called Argo, which includes almost 4,000 floating robots that "drift throughout the world's oceans, every few days diving to a depth of 2,000 meters (yards) and measuring the ocean's temperature, pH, salinity and other bits of information as they rise back up", said the report. In reality, the oceans' temperature, at waters down to 2,000 meters, reached a 0.1 degrees Celsius increase between 1975 and 2010. Also, the quality of older ocean data has been substantially improved, and there are both better and independent methods that account for the sparseness of ocean data before Argo era.

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In fact, these scientists say records for ocean warming have been broken nearly yearly since the year 2000.

The fourth takes a completely different approach, using the fact that a warming ocean releases oxygen to the atmosphere to calculate ocean warming from changes in atmospheric oxygen concentrations, while accounting for other factors, like burning fossil fuels, that also change atmospheric oxygen levels.

In the same direction, the European Union's Copernicus Climate Change Service estimated that 2018 had been the hottest year regarding global surface temperature.

"If the ocean wasn't absorbing as much heat, the surface of the land would heat up much faster than it is right now", Malin Pinsky, an associate professor in the department of ecology, evolution and natural resources at Rutgers University, told The New York Times.

Through the data collected, scientists have documented increases in rainfall intensity and more powerful storms such as hurricanes Harvey in 2017 and Florence in 2018.

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