Ocean temperatures rising faster than previously thought

Ocean temperatures rising faster than previously thought

People jump into the Atlantic Ocean during the annual Polar Bear Plunge on New Year's Day in Coney Island on January 1, 2019 in the Brooklyn borough of New York City.

'Because the ocean has large heat capacity it is characterized as a 'delayed response´ to global warming, which means that the ocean warming could be more serious in the future, ' the researcher said.

In the Arctic, the warming oceans are also causing a serious decline in sea ice, which only compounds the ongoing threats of climate change such as sea level rise.

The paper claims that ocean heating is a critical maker for global warming because an estimated 93% of excess solar energy gets trapped by greenhouse gases that accumulate in the oceans around the globe. The new article, led by Dr. Lijing Cheng of the Institute of Atmospheric Physics, Chinese Academy of Sciences, highlights how the new observations along with adjusted older records now clearly show not only how the ocean is warming but that the warming is accelerating.

When we see the effects of climate change around us, we mostly think about increasing temperatures in the atmosphere.

The thermal expansion - water swelling as it warms - would raise sea level 12 inches (30 centimeters), above any sea level rise from melting glaciers and ice sheets.

The oceans are said to be warming faster than previously thought.

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Assuming a "business-as-usual" scenario in which no effort has been made to reduce greenhouse gas emissions, the Coupled Model Intercomparison Project 5 (CMIP5) models predict that the temperature of the top 2,000 meters of the world's oceans will rise 0.78 degrees Celsius by the end of the century.

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.

Overall, temperatures in the ocean down to 2,000 metres rose about 0.1 degree Celsius (0.18F) from 1971-2010, he said. If, however, humans act and can reach the goals set by the Paris agreement, ocean warming could be cut in half by 2081-2100, the authors said. This ocean-monitoring battalion, called Argo, has provided consistent and widespread data on ocean heat content since the mid-2000s.

The study authors say the warming is happening because of climate change created by such human activities as the burning of fossil fuels. Warmer temperature will also damage coral reefs, which are actually nurseries for fish.

Another study report from the European Union's Copernicus Climate Change Service had revealed that 2018 was the fourth warmest year, in terms of global surface temperatures, in records dating back to the 19th century.

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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