The World Meteorological Organization has warned that the earth's wild weather this year is bursting the annual heat record due to man-made global warming, and this is compounded by a strong El Nino.

According to an early bird report on 2015 from the United Nations' weather agency, this year will be the warmest year on record.

Michel Jarraud, Secretary General of the World Meteorological Organization, said the world might have warmed by as much as 1 degree Celsius over pre-industrial times.

"So in a sense if we want to stay under 2 degrees Celsius, we have already warmed the atmosphere by more than half of what we need to do, so this is actually of great concern because as we said in the press conference on greenhouse gases, whatever CO2 has been emitted in the atmosphere stays there for very long time - for decades to centuries, so time is really not on our side."

International leaders have set a goal of keeping global warming within 2 degrees Celsius of pre-industrial times.

Omar Baddour, a climate expert at the World Meteorological Organization, predicted that next year might be even warmer due to the El Nino effect.

"If we look at the previous year, 2014, which was last year the warmest on record, it was not an El Nino year, and this year is not actually the full El Nino year, it is still starting and it will pick up next year, so what we can expect roughly is that next year might be warmer than this year because of the effect of El Nino."

Dr. Youba Sokona, vice chairman of the Intergovernmental Panel on Climate Change, warned that global warming is an indisputable fact.

He said several messages were conveyed through the IPCC Fifth Assessment Report released last November.

"Out of the 17 pages, we can exact three main key messages from the report. First, there is no doubt that climate change is unequivocal. There is no doubt about it. The second message is that the more we disrupt our climate system, the more we face severe, pervasive, disruptive consequences, impacts, and those might then be irreversible. And the last one is a message of hope. Still we do have means to build, present and better future."

The report warned that discreet climate changes monitored since the 1950s were unprecedented.

It also pointed out that if no greater efforts were made, global warming may result in severe and irreversible consequences in large areas of the world by the end of this century.