He said the increases measured by experts around the world meant that within the last year, global temperatures had increased by 25 per cent of the total increase since the 1880s.He said the rising temperatures were having very real impacts on the environment. He said he expected that sea ice levels will be found to be at an all time low this summer. Meanwhile, within the last 18 months, around one quarter of all coral colonies in the oceans had suffered bleaching as a result of warmer water and increased acidification.In such circumstances, the corals expel the algae living in their tissues and turn white. While coral can recover from such events, it is very often fatal.Mr Holthaus said he expected the record temperatures to continue for between four to six months, at which point they would begin to level out.Climate Change (IPCC) said in 2014 that there was a clear evidence human influence.It said warming of the atmosphere and ocean system was unequivocal. Many of the associated impacts such as sea level change, had occurred since 1950 at rates unprecedented in the historical record.