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"Warming of the climate system now is unequivocal," the group said in a statement on Monday. "Observations show increases in globally averaged air and ocean temperatures, as well as widespread melting of snow and ice and rising globally averaged sea level."
The dominant cause of the warming since the 1950s is human activities, they said, adding that their scientific finding is based on "a large and persuasive body of research."
"Due to natural variability," the statement noted, "not every year is warmer than the preceding year globally. Nevertheless, all of the 10 warmest years in the global temperature records up to 2011 have occurred since 1997, with 2005 and 2010 being the warmest two years in more than a century of global records."
"This statement is the result of hundreds of hours of work by many AMS members over the past year," comments 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."
Turning to the causes of such drastic changes, the AMS concluded that although the climate is always changing in some respects, the melting of the polar ice sheets, extreme flooding, intense droughts and the retreat of most of the world's glaciers "are beyond what can be explained by the natural variability of the climate."
They continue: "It is clear from extensive scientific evidence that the dominant cause of the rapid change in climate of the past half century is human-induced increases in the amount of atmospheric greenhouse gases, including carbon dioxide (CO2), chlorofluorocarbons, methane, and nitrous oxide. The most important of these over the long term is CO2, whose concentration in the atmosphere is rising principally as a result of fossil-fuel combustion and deforestation."
The AMS' new language follows pressure from some environmentalists and scientists who have criticized the meteorologist professionals for being ambiguous about the growing scientific evidence about the relationship between weather events and global climate change.
As the Summit County Citizens Voice explains: "The organization recently took some flak from environmental activists who want weather forecasters to discuss how climate change might be affecting what people experience in their day-to-day weather. One group, Forecast the Facts, publicly called out TV weather forecasts by name. The group also published a study suggesting that 27 percent of TV weather forecasters call global warming a scam, while half deny that global warming is caused by emission of greenhouse gases."
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"Warming of the climate system now is unequivocal," the group said in a statement on Monday. "Observations show increases in globally averaged air and ocean temperatures, as well as widespread melting of snow and ice and rising globally averaged sea level."
The dominant cause of the warming since the 1950s is human activities, they said, adding that their scientific finding is based on "a large and persuasive body of research."
"Due to natural variability," the statement noted, "not every year is warmer than the preceding year globally. Nevertheless, all of the 10 warmest years in the global temperature records up to 2011 have occurred since 1997, with 2005 and 2010 being the warmest two years in more than a century of global records."
"This statement is the result of hundreds of hours of work by many AMS members over the past year," comments 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."
Turning to the causes of such drastic changes, the AMS concluded that although the climate is always changing in some respects, the melting of the polar ice sheets, extreme flooding, intense droughts and the retreat of most of the world's glaciers "are beyond what can be explained by the natural variability of the climate."
They continue: "It is clear from extensive scientific evidence that the dominant cause of the rapid change in climate of the past half century is human-induced increases in the amount of atmospheric greenhouse gases, including carbon dioxide (CO2), chlorofluorocarbons, methane, and nitrous oxide. The most important of these over the long term is CO2, whose concentration in the atmosphere is rising principally as a result of fossil-fuel combustion and deforestation."
The AMS' new language follows pressure from some environmentalists and scientists who have criticized the meteorologist professionals for being ambiguous about the growing scientific evidence about the relationship between weather events and global climate change.
As the Summit County Citizens Voice explains: "The organization recently took some flak from environmental activists who want weather forecasters to discuss how climate change might be affecting what people experience in their day-to-day weather. One group, Forecast the Facts, publicly called out TV weather forecasts by name. The group also published a study suggesting that 27 percent of TV weather forecasters call global warming a scam, while half deny that global warming is caused by emission of greenhouse gases."
# # #
"Warming of the climate system now is unequivocal," the group said in a statement on Monday. "Observations show increases in globally averaged air and ocean temperatures, as well as widespread melting of snow and ice and rising globally averaged sea level."
The dominant cause of the warming since the 1950s is human activities, they said, adding that their scientific finding is based on "a large and persuasive body of research."
"Due to natural variability," the statement noted, "not every year is warmer than the preceding year globally. Nevertheless, all of the 10 warmest years in the global temperature records up to 2011 have occurred since 1997, with 2005 and 2010 being the warmest two years in more than a century of global records."
"This statement is the result of hundreds of hours of work by many AMS members over the past year," comments 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."
Turning to the causes of such drastic changes, the AMS concluded that although the climate is always changing in some respects, the melting of the polar ice sheets, extreme flooding, intense droughts and the retreat of most of the world's glaciers "are beyond what can be explained by the natural variability of the climate."
They continue: "It is clear from extensive scientific evidence that the dominant cause of the rapid change in climate of the past half century is human-induced increases in the amount of atmospheric greenhouse gases, including carbon dioxide (CO2), chlorofluorocarbons, methane, and nitrous oxide. The most important of these over the long term is CO2, whose concentration in the atmosphere is rising principally as a result of fossil-fuel combustion and deforestation."
The AMS' new language follows pressure from some environmentalists and scientists who have criticized the meteorologist professionals for being ambiguous about the growing scientific evidence about the relationship between weather events and global climate change.
As the Summit County Citizens Voice explains: "The organization recently took some flak from environmental activists who want weather forecasters to discuss how climate change might be affecting what people experience in their day-to-day weather. One group, Forecast the Facts, publicly called out TV weather forecasts by name. The group also published a study suggesting that 27 percent of TV weather forecasters call global warming a scam, while half deny that global warming is caused by emission of greenhouse gases."
# # #