The oceans are becoming a repository for almost all of Earth’s excess heat, driving up sea levels and threatening coastlines, according to a leaked draft of the most comprehensive United Nations report addressing climate science.
Temperatures in the shallowest waters rose by more than 0.1 degree Celsius (0.18 degree Fahrenheit) a decade for the 40 years through 2010, the study found. Average sea levels have increased worldwide by about 19 centimeters (7.5 inches) since 1901 and researchers said it’s “very likely” the system of ocean currents that includes the Gulf Stream will slow in the coming decades.
Changes have been observed in ocean properties of relevance to climate during the past 40 years, including temperature, salinity, sea level, carbon, pH and oxygen.Oceans are becoming more acidic, with the pH level dropping by about 0.1 since industrialization because the seas are absorbing human emissions of carbon dioxide, according to a report.
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