A new study in the journal Nature says most sea level rise research may have underestimated coastal water heights by an average of 1 foot or about 30 centimeters.

GENEVA – The world could see annual global temperatures pass a key threshold for the first time in the coming five years, the U.N. weather agency said Thursday. The 1.5 C mark is the level countries agreed to cap global warming at in the 2015 Paris accord. Scientists say average temperatures around the world are already at least 1 C higher now than from 1850-1900 because of man-made greenhouse emissions. The five-year period is expected to see annual average temperatures that are 0.91 C to 1.59 C higher than pre-industrial averages, it said. The forecast is contained in an annual climate outlook based on several long-term computer models compiled under the leadership of the United Kingdom’s Met Office.