Special Report on the Ocean and Cryosphere in a Changing Climate

In its Summary for Policymakers (SPM), the report said that, since 1970, the "global ocean has warmed unabated" and "has taken up more than 90% of the excess heat in the climate system."

"[6] Global mean sea levels (GMSL) rose by 3.66 mm (0.144 in) per year which is "2.5 times faster than the rate from 1900 to 1990".

In their summary of the SROCC, Carbon Brief said that rate of rising sea levels is "unprecedented" over the past century.

Worst-case projections are higher than thought and a 2 metres (6.6 ft) rise by 2100 "cannot be ruled out",[9] if greenhouse gas emissions continue to increase strongly.

As the ocean warms, mixing between water layers decreases, resulting in less oxygen and nutrients being available for marine life.

"[10] Carbon Brief described AMOC as "the system of currents in the Atlantic Ocean that brings warm water up to Europe from the tropics.

[12]: 98  "Expert assessment and laboratory soil incubation studies suggest that substantial quantities of C (tens to hundreds Pg C) could potentially be transferred from the permafrost carbon pool into the atmosphere under the Representative Concentration Pathway (RCP) 8.5" projection.

[8] According to the Times, "Sea levels are rising at an ever-faster rate as ice and snow shrink, and oceans are getting more acidic and losing oxygen.

"[8] IPCC Working Group I Co-Chair, Valérie Masson-Delmotte, was quoted as saying in Monaco, that "Climate change is already irreversible.

Melting glaciers and ice sheets are causing sea levels to rise, increasing the risk of inundation and devastation to hundreds of millions of people living in coastal areas.

[17] National Geographic said that according to the report, "These challenges are only going to get worse unless countries make lightning-fast moves to eliminate greenhouse gas emissions...