Last year was the warmest year on record for land and sea, partly because seasonal El Nino climate patterns prevailed year-round, and melting ice pushed sea levels to the highest ever, a study based on the work of more than 450 scientists worldwide confirmed on Tuesday.

The State of the Climate report, published by the American Meteorological Society, followed a report by two U.S. government agencies that found 2015's global average temperature was the hottest ever by the widest margin on record.

The annual study, led by the National Oceanographic and Atmospheric Administration, would likely add fuel to the ongoing debate over global warming policies such as the international agreement forged in Paris in December.