Strongest climate signals coming from Arctic and extreme weather events
By Bob Berwyn
FRISCO — Some of the most compelling signs of global warming impacts continued to come from the Arctic in 2012, where sea ice extent reached a record low and Greenland experienced record surface melting last summer.
Another worrying sign is the warming in permafrost regions, where significant thawing could release a new surge of heat-trapping greenhouse gases that would intensify warming.
Science, conservation groups call for high-level talks on addressing climate challenges
By Summit Voice
SUMMIT COUNTY — Citing damage from intense storms like Sandy, more intense and frequent wildfires and prolonged droughts, a coalition of national groups, including the American Meteorological Society and the American Fisheries Society, are calling for a national, science-based climate summit.
In a Feb. 8 letter to President Bararck Obama, the groups said the summit “would be designed to identify policies and actions that can be taken by each Federal agency and by state and local governments to address the causes and effects of climate change.”
SUMMIT COUNTY — The combination of more atmospheric carbon dioxide and less particulate pollution could result in a steady increase in the intensity of North Atlantic hurricanes, according University of Iowa researcher Gabriele Villarini, an assistant professor of civil and environmental engineering
SUMMIT COUNTY — While there are still a few prominent TV weather announcers who publicly question the overwhelming body of global warming science, the American Meteorological Society has updated its official position on climate change, acknowledging unequivocally “that Earth’s lower atmosphere, ocean, and land surface are warming; sea level is rising; and snow cover, mountain glaciers, and Arctic sea ice are shrinking. The dominant cause of the warming since the 1950s is human activities.”
“This statement is the result of hundreds of hours of work by many AMS members over the past year,” said AMS executive director Keith Seitter. “It was a careful and thorough process with many stages of review, and one that included the opportunity for input from any AMS member before the draft was finalized,” Seitter said. The full statement is online at the AMS website.
Increased atmospheric water vapor seen as key ingredient
By Summit Voice
SUMMIT COUNTY — Parts of the U.S. have seen clear statistical trends more extreme precipitation events in the past few decades, according to a new paper from the American Meteorological Society based on extensive research from federal and state agencies, as well as academic sources.
Increased water vapor in the atmosphere, as outlined by many climate change models, may be one of the key factors in the the observed changes, according to the researchers, who said that weren’t able to measure statistically significant changes in severe thunderstorms.