Arctic Sea Ice Melt, Methane Release Shows Amplifying Feedbacks from Human Caused Climate Change

robertscribbler

For years now, scientists have warned that additional atmospheric heat caused by human releases of carbon dioxide (CO2) could result in amplifying feedbacks that cause even more heat. At first, most of these comments were academic, an exercise in predicting what would happen if humans did not curtail greenhouse gas emissions. But as human CO2 emissions continued to increase, global warming amplified and changes accelerated. Now the warnings from scientists are much more direct. Consider NASA scientist James Hansen’s most recent statement:

“We don’t have a substantial cushion between today’s climate and dangerous warming. Earth is poised to experience strong amplifying feedbacks in response to moderate additional global warming.” – James Hansen

Amplifying Feedbacksvia Microphone

An amplifying feedback is a rapidly increasing response to an initial forcing. In everyday life, people are generally familiar with what happens when you put a microphone close to a speaker. The microphone picks…

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