Climate panel: warming 'extremely likely' man-made

STOCKHOLM (WACH/AP) -- A landmark report by an international scientific panel says it's "extremely likely" that human activity is the dominant cause of global warming.

That's the strongest statement to date on the issue by the Intergovernmental Panel on Climate Change (IPCC).

In its previous assessment, in 2007, the U.N.-sponsored panel said it was "very likely" that global warming was man-made.

It now says the evidence has grown thanks to more observations, a better understanding of the climate system and improved models to analyze the impact of rising temperatures.

The IPCC says a human footprint can be found in the warming of the atmosphere and oceans, in rising sea levels, melting snow and ice and in changes in some climate extremes.

According to the panel's website, "The Working Group I (WGI) contribution to the IPCC Fifth Assessment Report provides a comprehensive assessment of the physical science basis of climate change in 14 chapters, supported by a number of annexes and supplementary material."

This report had 209 lead authors and 50 review editors from 39 countries. Additionally, the report included work from 600 contributing authors from 32 countries.

Three more reports will be released over the coming months with the final synthesis being released in November of 2014.

Here is a link to the "Summary for Policymakers" from the first report of the 5th assessment by Working Group I.