New Delhi, Sept. 26 -- In a wake-up call to world leaders, the Intergovernmental Panel on Climate Change (IPCC) has warned that oceans are projected to transition to "unprecedented" conditions, marked by an increase in temperatures, higher acidification and a decline in the oxygen levels over the rest of the 21st century.

Marine heatwaves and extreme El Nino and La Nina phenomena will become frequent, IPCC said in a report released on Wednesday. It said that the global mean surface temperature is projected to rise by around 1.6 degree over pre-industrial levels by as early as 2031-2050 and this projection is used in the report to assess future scenarios.p19

Published by HT Digital Content Services with permission from HT Gurgaon....