NATIONAL — A United Nations report published today concludes that human activity is responsible for at least half of the global warming that has been documented since the 1950s.
The IPCC Assessment Report is a benchmark study on global warming published every few years based on work conducted by nearly 1,000 researchers from around the world and a review by about as many scientists.
This year’s report says scientists have confirmed theories about climate change and the danger it presents to mankind in the form of floods, droughts and erratic and violent weather.
“It is extremely likely that human influence has been the dominant cause of the observed warming since the mid-20th century,” according to the latest assessment by the Intergovernmental Panel on Climate Change (IPCC).
The evidence for this has grown, thanks to more and better observations, an improved understanding of the climate system response and improved climate models.
Warming in the climate system is unequivocal and since 1950 many changes have been observed throughout the climate system that are unprecedented over decades to millennia.
Each of the last three decades has been successively warmer at the Earth’s surface than any preceding decade since 1850, reports the Summary for Policymakers of the IPCC Working Group I assessment report, Climate Change 2013: the Physical Science Basis, approved on Friday by member governments of the IPCC in Stockholm, Sweden.
“Observations of changes in the climate system are based on multiple lines of independent evidence. Our assessment of the science finds that the atmosphere and ocean have warmed, the amount of snow and ice has diminished, the global mean sea level has risen and the concentrations of greenhouse gases have increased,” said Qin Dahe, Co-Chair of IPCC Working Group I.
Thomas Stocker, the other Co-Chair of Working Group I said: “Continued emissions of greenhouse gases will cause further warming and changes in all components of the climate system. Limiting climate change will require substantial and sustained reductions of greenhouse gas emissions.”
“Global surface temperature change for the end of the 21st century is projected to be likely to exceed 1.5°C relative to 1850 to 1900 in all but the lowest scenario considered, and likely to exceed 2°C for the two high scenarios,” said Co-Chair Thomas Stocker. “Heat waves are very likely to occur more frequently and last longer. As the Earth warms, we expect to see currently wet regions receiving more rainfall, and dry regions receiving less, although there will be exceptions,” he added.
Projections of climate change are based on a new set of four scenarios of future greenhouse gas concentrations and aerosols, spanning a wide range of possible futures. The Working Group I report assessed global and regional-scale climate change for the early, mid-, and later 21st century.
“As the ocean warms, and glaciers and ice sheets reduce, global mean sea level will continue to rise, but at a faster rate than we have experienced over the past 40 years,” said Co-Chair Qin Dahe.
The report finds with high confidence that ocean warming dominates the increase in energy stored in the climate system, accounting for more than 90% of the energy accumulated between 1971 and 2010.
Political con artists have been trying to portray climate change as a natural phenomena or false theory in order to protect oil companies and other high volume polluters from accountability, but they ignore the cost of inaction.
“The concept of global warming was created by and for the Chinese in order to make U.S. manufacturing non-competitive,” said Donald J. Trump, on the eve of the 2012 presidential election.
Trump — the profound megalomaniac who shared in a $400 million estate left when his father died on June 25, 1999 and convinced much of the world that he possesses business acumen — may be ignorant that the first scientist to write about the ‘greenhouse effect’ was French physicist Joseph Fourier in 1824; followed by Irish physicist John Tyndall in 1861, but he is part of a sinister plot intended to harm people to protect money.
Climate change denial is an organized attempt to downplay, deny or dismiss the scientific consensus on the extent of global warming, its significance, and its connection to human behavior for commercial or political reasons.
The character and methods among climate change deniers is reminiscent of the tobacco industry’s deadly deception around heart attacks and cancer or the underhanded strategies and tactics used to create doubts about the Holocaust rather than skepticism, which is essential for good science.
Anonymous billionaires donated $120 million to more than 100 anti-climate groups working to discredit climate change science between 2002 and 2010.
Without an immediate and concentrated effort to reverse the effect of climate change, heavily populated regions of the Earth will become inhospitable to human habitation due to rising sea levels and unpredictable alterations in weather patterns.
Republican Gov. Chris Christie, running for re-election, recently dismissed climate change as a “distraction” instead of confronting it as a key reason behind the severity and course of Superstorm Sandy. Christie withdrew New Jersey from the Regional Greenhouse Gas Initiative (RGGI), a market-based effort to reduce gas emissions in the northeastern and mid-atlantic states.
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