Well-known climate scientists said on Friday they were “more certain than ever before” that humans have been the main cause of the “unequivocal” global warming recorded in the past 60 years, and warned the impact of greenhouse gas emissions would linger for centuries.
The landmark report, likely to rekindle debate over the fossil fuels powering the world’s economies, played down the fact temperatures have risen more slowly in the past 15 years, saying there were substantial natural variations that masked a long-term warming trend.
“It is extremely likely that human influence has been the dominant cause of observed warming since the mid-20th century,” says the summary issued Friday. This means a probability of at least 95%, up from 90% estimated in 2007 and 66% in 2001.
But scientists who challenge the notion of man-made climate change insist that the fact that temperatures have risen more slowly recently, despite rising greenhouse gas emissions, must mean something.
The Intergovernmental Panel on Climate Change (IPCC) insisted the warming trend is undeniable and alerted that if industrial greenhouse gas emissions keep rising, they are likely to increase global warming levels. This, in turn, will lead to changes in global sea levels, ice cover and other aspects of the climate already shifting in ways not seen for thousands of years.
The document is the result of four years of research by 259 scientists from 39 countries and it is part of the first comprehensive assessment in six years by the panel. The group was set up 25 years ago to give governments reliable information about climate change.
Images by f9photos/shutterstock.com and asharkyu
6 Comments
mikehaseler
Before it was “very likely”. Now it is “extremely likely”. Another 15 years with no warming and they will be dead certain.
conodo mose
This last sentence reveals the problem with the IPCC, their prognostications and the reason for its dismantling. IPCC cannot say there is not climate change because by its charter that is prohibited. It is irrelevant how many scientists work for them as their mandate opposes neutrality, scientific evidence, and truth.
Owen
Those who deny mankind’s contribution to warming have a “primitive understanding” of the science behind the Earth’s climate, says Christiana Figueres, head of the IPCC.
conodo mose
The “temperatures” reported by IPCC are computer modeled, an average of 73 (CMIP-5/rcp8.5) climate models. Model temperatures today are 0.8 deg C above the actual temperature from satellite (Remote Sensing Systems, RSS) and balloon (Univ of Alabama-Huntsville, UAH) measurements. Temperatures measured by satellite and balloon are essentially the same (or little changed) from those measured in 1978 when RSS first provided satellite temperature measurements. The modeled “temperatures” are now so extreme that the RSS-UAH (actual) global temperatures fall outside the model “temperatures” 99% confidence limit. So goes Christina Fugueres’ primitive understanding of science.
European
Please post the peer reviewed sources behind your postings. I guess you can’t, so please stopp.
RogueDave
James Corbett of CorbettReport.com dismantles the IPCC and their output.
https://www.youtube.com/watch?v=LOyBfihjQvI&feature=c4-overview&list=UU7TvL4GlQyMBLlUsTrN_C4Q
Can you say Agenda 21?